A 2-D scanning system uses a fast-rotating raster-polygon as a single scanning component to produce straight scan lines over a 2-D image surface. An approach angle of incident light beams to the raster-polygon is selected to minimize pin-cushion distortion of scan lines introduced by polygon scanning on the image surface, and a tilt angle of the rotational axis of the raster-polygon is selected to position said polygon-scanning distortion symmetrically on the image surface. In addition, scan optics are configured to generate a predetermined amount of barrel distortion of scan lines on the image surface to compensate for pin-cushion distortion introduced by polygon scanning.

Electrical power is dynamically managed among one or more power sources and one or more loads. A plurality of monitor nodes is connected to an input terminal connected to each source, and to an output terminal connected to each load. A plurality of electrical power storage cells is connected among the input and output terminals, each cell being capable of storing power from at least one of the sources and being capable of discharging stored power to at least one of the loads. A plurality of controllable switches is connected to the cells. A programmed controller dynamically monitors operating conditions at the monitor nodes during operation of each source and each load, and selectively dynamically controls the switches to interconnect the cells in different circuit topologies in response to the monitored operating conditions.

Embodiments include systems and methods of powering a mobile device using a sink device. The method may include detecting a coupling of the mobile device to the sink device and transmitting an acknowledgement in response to a query, the acknowledgement confirming that the sink device has charging capability. Power may be selectively provided in response to the power request. According to some embodiments, the method includes transmitting a query by a communications transmitter to determine if a sink device has charging capability, and deactivating a driver for a power line and transmitting a power request using the communications transmitter in response to receiving an acknowledgement signal from the sink device. The method may further include selectively providing power received from the sink device to a charging circuit of the mobile device. The mobile device may include an HDMI transmitter for communicating through a transmission line to an HDMI sink device.

A method by which a halogen atom of a halogen compound can be efficiently replaced with an electrophilic group. Also provided are: a reagent for converting a functional group through a halogen-metal exchange reaction, characterized by comprising either a mixture of a magnesium compound represented by the formula R1—Mg—X (I) (wherein R1 represents a halogen atom or an optionally substituted hydrocarbon residue; and X1 represents a halogen atom) and an organolithium compound represented by the formula R2—Li (II)(wherein R2 represents an optionally substituted hydrocarbon residue) or a product of the reaction of the magnesium compound with the organolithium compound; and a process for producing with the reagent a compound in which a halogen atom of a halogen compound has been replaced with an electrophilic group.

Atmosphere control members (ACMs) are used in various ways. In one aspect, at least one of the atmospheres in contact with the ACM is cause to flow over the surface of the ACM. In another aspect, the ACM is an internal ACM which does not form part of the exterior surface of a container. In another aspect, the ACM forms part of a reusable module. In another aspect, a plurality of sealed containers, each including an ACM, are stored in an outer container also including an ACM. FIGS. 3-5 illustrate a shipping container (11) comprising an internal ACM (3) having one surface which is exposed to the packaging atmosphere within the shipping container and an opposite surface which is part of a closed chamber (2) to which gases can be supplied in a controlled fashion.

A turbocharger arrangement in an internal combustion engine is provided. The turbocharger arrangement includes a turbocharger housing surrounding a sealed inner space and a shaft extending through the turbocharger housing. The turbocharger arrangement further includes a turbine wheel arranged on the shaft and driving a compressor unit, a bearing arrangement mounting the shaft in the turbocharger housing, an oil supply device lubricating the bearing arrangement, and a pressure changing unit in fluidic communication with the sealed inner space configured to adjust the pressure in the sealed inner space based on engine operating conditions.

An imaging apparatus includes a front lens group including a front lens element and a reflector, a movable frame supporting the front lens element, and a driver driving the movable frame to reduce image shake. The driver includes first and second voice coil motors, each including a coil and a magnet. The magnets are positioned orthogonal to each other in a plane orthogonal to a first optical axis that passes through the front lens element. The first and second voice coil motors are positioned on opposite sides of a first plane, including the first optical axis and a second optical axis that extends from the reflector. Centers of each magnet and coil are on one side of a second plane, including the first optical axis and is orthogonal to the first plane. The magnets are inclined and approach the first plane in a direction away from the second plane.

The present invention relates to a moving member control apparatus that makes sure unerring control of a moving member having an ill-balanced structure and an imaging apparatus that incorporates that control apparatus.

The CPU acquires the output of an angular velocity sensor and performs image shake correction. An angle 1 calculating unit integrates a signal from which an offset component is removed to calculate an angle 1. An angular velocity subtraction amount calculating unit calculates an angular velocity subtraction amount based on a signal obtained by subtracting a first offset from the output of the angular velocity sensor and a signal obtained by subtracting a second offset from the output of the angle 2 calculating unit. An angle 2 calculating unit integrates a signal obtained by subtracting the angular velocity subtraction amount from the output of the angular velocity sensor to calculate an angle 2. The CPU performs image shake correction based on the angle 1 prior to operation of a release SW, whereas the CPU performs image shake correction based on the angle 2 after operation of the release SW.

An imaging apparatus for performing wireless communication with an external device. An instruction transmitting unit transmits an operation instruction to the external device. A response signal receiving unit receives a response signal from the external device. A first controlling unit starts a first operation relating to an imaging process in a case that a first time passes from a point of receiving the response signal by the response signal receiving unit. The external device executes a second operation relating to the imaging process in a case that a second time passes from a point of transmitting the response signal from the external device to the imaging apparatus.

A viewfinder 3 includes a finder optical system S2 including first and second lens groups L1, L2; a zoom frame 6 provided with first and second cam grooves 63, 64 configured to rotate about an optical axis A2 to move the first and second lens groups L1, L2 in the optical axis direction in accordance with the shapes of the first and second cam grooves 63, 64; and a diopter adjuster 9 configured to adjust the diopter of the finder optical system S2. The diopter adjuster 9 changes the position of the zoom frame 6 in the optical axis direction to adjust the diopter of the finder optical system S2, and adjusts, during rotation of the zoom frame 6, the position of the zoom frame 6 in the optical axis direction such that the diopter of the finder optical system S2 is maintained.

An ophthalmologic imaging apparatus includes an observation light source configured to generate infrared light for illuminating a subject's eye via an illumination optical system, an imaging unit configured to receive light returned from the subject's eye via an imaging optical system, and an electronic shutter control unit configured to refresh charge generated caused by light received by the imaging unit in response to turning off of the observation light source.

An imaging apparatus includes a shooting lens having a focus lens for adjusting a degree of focus on an imaging plane; an image sensor converting an optical image of a photographic subject to an electric image signal and outputting it; a confirmation image creator creating a focus state confirmation image in which a part, or a whole of an image expressed by the image signal is enlarged; a display displaying the focus state confirmation image; and a focus evaluation value calculator calculating a focus evaluation value based on the image signal; wherein when a state of an inclination of change in a focus evaluation value calculated at a plurality of positions of the focus lens while moving the focus lens is different from a state of an inclination of change in a focus evaluation value calculated immediately before, the focus state confirmation image is displayed on the display.

A method of reducing light damage in a shutterless imaging device includes receiving a signal from a hardware device. The signal from the hardware devices is analyzed. In response to the analysis of the signal from the hardware device, a lens of the shutterless imaging device is adjusted. Adjusting the lens spreads out energy of far-field image light incident on an image sensor of the shutterless imaging device.

A digital camera is provided with a vertically long camera body having an approximately rectangular solid shape. An LCD panel provided in a rear surface of the camera body is arranged such that longitudinal directions of the display screen and the camera body correspond to each other. The digital camera is operated through a touch panel provided in a lower portion of the display screen. In a taking mode, an image is displayed in a small size on an upper portion of the display screen. In reproducing, the camera body is rotated sideways by 90 degree. In a reproducing mode, display posture of the image is also rotated by 90 degree, and the image is displayed in a large size on the entire display screen.

A swinging bob toy having three bobs constrained on a string, the middle bob being slideably constrained between the two end bobs, and at least one of the bobs being reversibly separable into two partial bobs. A wide variety of new tricks and maneuvers are made possible by the separability of the bobs. The two partial bobs have roughly the same weight thereby providing balanced orbits. Each of the two partial bobs slides less easily along the string than a non-separated bob. The two partial bobs have roughly the same diameter along at least one axis thereby allowing visual illusions to be performed.

The system described in this disclosure may be configured to read information stored on toy objects that indicates whether the toy objects have been used and/or are being used with other toy objects, gaming systems, and/or other devices. The system described in this disclosure may be configured to facilitate an association of the information stored on the toy objects with virtual entities in a virtual space, update virtual content associated with the virtual entities, determine relationships between users, and/or other perform other functions based on the information stored on the toy objects. The information stored on the toy objects may be updated responsive to the toy objects being used by users with other toy objects, gaming systems, and/or other devices. The use of the toy objects by users may include two or more users playing together with toy objects and/or playing with gaming systems associated with the toy objects.

A hanging lamp assembly provides visual stimulation and relaxation. The assembly includes a container having a transparent perimeter wall defining an interior space. A first fluid and a second fluid are positioned in the interior space defining a liquid mass. The second fluid has a density different than a density of the first fluid wherein the first fluid and the second fluid are layered within the interior space defining a fluid interface between the first liquid and the second liquid. The first fluid is a non-clear color and the second fluid is a different color than the first fluid. A plurality of items is positioned in the interior space such that the items are suspended in the liquid mass. A light source is coupled to the container directing light towards the liquid mass. A hanger is coupled to the container such that the container swings freely from a supporting structure.

A heat dissipation device of a light engine for a projector has a housing, a fan module, a light engine and a heat sink. The light engine is positioned in the housing and connected to the heat sink. The heat sink is positioned out of the housing. The housing has a fan-enclosed flow channel attached on an outer surface of the housing. The fan module is guided by the fan-enclosed flow channel to the heat sink to enhance heat dissipation efficiency of the light engine for the projector.

A counter configured to perform counting at both edges of an input clock to output an additional value or a subtraction value for a previous count value and a next count value includes a first latch circuit that latches the input clock, a second latch circuit that latches an output from the first latch circuit, a holding section that holds data of the 0th bit of a count value, and a correction section that performs count correction on data of the first and subsequent bits of the count value on the basis of an output of the second latch circuit.

Embedded logic is implemented in a partially reconfigurable programmable logic device (PLD), thus allowing debugging of implemented instantiations of logic after partial reconfiguration. Several instantiations of logic are received at the PLD. One instantiation of logic is implemented in a reconfigurable region of logic within the PLD. The instantiation of logic includes a port that provides a constant interface between the reconfigurable region of logic and a fixed region of logic within the PLD. The port may receive signals from probe points implemented within the reconfigurable region of logic. The port may provide the signals to a signal interface implemented within a fixed region of logic. Furthermore, an embedded logic analyzer may be implemented in either the reconfigurable region of logic or the fixed region of logic. The embedded logic analyzer receives signals from the probe points and provides signal visibility to an external computing system.

A ring oscillator circuit causing a pulse signal to circulate around a circle to which an even number of inverting circuits are connected in a ring, wherein one of the inverting circuits is a first starting inverting circuit, which drives a first pulse signal according to a control signal, another of the inverting circuits is a second starting inverting circuit, which drives a second pulse signal based on a leading edge of the first pulse signal, still another is a third starting inverting circuit, which drives a third pulse signal based on the leading edge of the first pulse signal after the second pulse signal is driven, and the first to third starting inverting circuits are arranged within the circle of the inverting circuits in order of the third, second, and first pulse signals in traveling directions of the pulse signals.

A ring-oscillator-based on-chip sensor (OCS) includes a substrate having a semiconductor surface upon which the OCS is formed. The OCS includes an odd number of digital logic stages formed in and on the semiconductor surface including a first stage and a last stage each including at least one NOR gate including a first gate stack and/or a NAND gate including a second gate stack. A feedback connection is from an output of the last stage to an input of the first stage. At least one discharge path including at least a first p-channel metal-oxide semiconductor (PMOS) device is coupled between the first gate stack and a ground pad, and/or at least one charge path including at least a first n-channel metal-oxide semiconductor (NMOS) device is coupled between the second gate stack a power supply pad.

Imaging apparatus and methods for bindery systems. An example apparatus disclosed herein includes a platform having a plurality of openings to provide suction through a surface of the platform and a first track that moves across the surface of the platform. The first track has a plurality of apertures to fluidly couple the suction to an upper surface of the first track.

A vehicular imaging and display system includes a rear backup camera at a rear portion of a vehicle, a video processor for processing image data captured by the rear camera, and a video display screen responsive to the video processor to display video images. During a reversing maneuver of the equipped vehicle, the video display screen displays video images captured by the rear camera. During forward travel of the equipped vehicle, the video display screen is operable to display images representative of a portion of the field of view of the rear camera to display images representative of an area sideward of the equipped vehicle responsive to at least one of (a) actuation of a turn signal indicator of the vehicle, (b) detection of a vehicle in a side lane adjacent to the equipped vehicle and (c) a lane departure warning system of the vehicle.

Currency bills are received, transported, and imaged to produce image data from which a visually readable image of each currency bill can be reproduced. Each of the currency bills includes a denomination, a serial number, and a set of secondary identifiers. One of the currency bills is determined to be a suspect bill. The suspect bill serial number is attempted to be extracted from the image data associated with the suspect bill. In response to failing to extract a complete serial number of the suspect bill, a serial number field in a suspect report is populated with a serial number snippet image.

An exemplary system for managing the deployment of a seismic data acquisition system uses a module configured to execute a plurality of task in the field by receiving one or more seismic devices. The module may include a power source that provides electrical power to the seismic devices. The module may also include a processor programmed to retrieve data stored in the seismic devices, perform diagnostics, facilitate inventory and logistics control, configure seismic devices and update data or pre-programmed instructions in the seismic device.

A printing device includes at least one printing engine that has actuators and sensors. At least one engine controller is operatively connected to the printing engine, the engine controller uses software to control operations of the printing engine. At least one non-volatile memory is operatively connected to the engine controller. The non-volatile memory stores values used by the engine controller to control operations of the printing engine. Further, at least one adapter card is operatively connected to the non-volatile memory and to the actuators and sensors. The adapter card stores data and receives sensor feedback from the sensors. The adapter card uses the data and the sensor feedback to control the actuators by bypassing the engine controller when communicating with the actuators. The adapter card provides adapter card feedback to the non-volatile memory.

A forging heat resistant steel of an embodiment contains in percent by mass C: 0.05-0.2, Si: 0.01-0.1, Mn: 0.01-0.15, Ni: 0.05-1, Cr: 8 or more and less than 10, Mo: 0.05-1, V: 0.05-0.3, Co: 1-5, W: 1-2.2, N: 0.01 or more and less than 0.015, Nb: 0.01-0.15, B: 0.003-0.03, and a remainder comprising Fe and unavoidable impurities.

Disclosed are: a casting aluminum alloy that is excellent in elongation as alternative properties of a high cycle fatigue strength and a thermal fatigue strength and is suitably usable for a casting for which both of the excellent high cycle fatigue strength and the excellent thermal fatigue strength are required, for example, an internal combustion engine cylinder head; a casting made of the aluminum alloy; a manufacturing method of the casting; and further, an internal combustion engine cylinder head composed of the aluminum alloy casting and manufactured by the manufacturing method of the casting. The casting aluminum alloy contains, in terms of mass ratios, 4.0 to 7.0% of Si, 0.5 to 2.0% of Cu, 0.25 to 0.5% of Mg, no more than 0.5% of Fe, no more than 0.5% of Mn, and at least one component selected from the group consisting of Na, Ca and Sr, each mass ratio of which is 0.002 to 0.02%.

In a reflow process, a plurality of solder bumps between a first workpiece and a second workpiece is melted. During a solidification stage of the plurality of solder bumps, the plurality of solder bumps is cooled at a first cooling rate. After the solidification stage is finished, the plurality of solder bumps is cooled at a second cooling rate lower than the first cooling rate.

A multi-sectional portable pigging pole configured to retrieve a pig from a pipe. The pigging pole includes a first shaft member and a second shaft member. The first shaft member and the second shaft member are configured to interlock so as to form a shaft. The shaft is configured to extend reach into the pipe to retrieve the pig from therein.

A plug for heat-conducting tubes is equipped with: a plug main body, which is formed so as to be capable of being inserted into the heat-conducting tubes; a columnar member, which is capable of being inserted into and removed from the plug main body from the cylindrical open end of the plug main body, and has at its outer circumference a tapered surface; and a wedge member, which is formed so as to be capable of being inserted into and removed from the plug main body from the cylindrical open end of the plug main body, and has at its inner circumference a tapered surface which opposes the tapered surface of the columnar member when the wedge member is inserted into the plug main body.

Disclosed is a system for managing multiple objects in an object zone. The system comprises multiple machine-readable object identification tags configured to be respectively attached to the multiple objects; a storage unit moving through the object zone to store the selected objects which are respectively attached with the machine-readable object identification tags; at least one machine-readable storage unit identification tag attached to the storage unit; and multiple spaced reading units capable of remotely reading the multiple machine-readable object identification tags and the at least one machine-readable storage unit identification tag, wherein the objects attached with the machine-readable object identification tags within a predefined spatial range defined based on the at least one machine-readable storage unit identification tag are associated with the storage unit. A method thereof and a storage unit are also disclosed.

An improved document scanning device and a scanning method for checking the transparency and thickness of an identification document. In a preferred embodiment, any one surface of the document is illuminated by the illumination source facing the said surface and the opposite surface of the document is captured by the camera. The amount of light that passes through the illuminated surface of the document is measured and contrasted with the amount of light that passes through the same surface of a reference or original document. The scanning method is also capable of validating an identification document by detecting and authenticating any laser image imprinted on such document.

An imaging reader reads targets by image capture in both handheld and hands-free modes of operation. Upon detection of the mode of operation, a controller sets the resolution and frame rate of a solid-state imaging sensor to different values in each mode to optimize target reading performance in each mode.

The spark plug has a configuration satisfying the relationships of B≧0.7A and 0.3 mm≦A≦0.6 mm, where B is an axial thickness along the central axis line Q of the weld portion formed between the base material electrode and the noble-metal chip, and A is an axial distance along the central axis line Q between the intersection points P3 and X. The intersection point P3 is a point at which a phantom axis line radially distant from the central axis line Q by D/2 (D being a diameter of the noble-metal chip) intersects with the boundary line between the weld portion and the noble-metal chip. The intersection point X is a point at which an extension of the contour line of the base material electrode in the vicinity of the weld portion intersects with a boundary line between the weld portion and the base material electrode.

An exhaust system for a compression ignition engine comprising an oxidation catalyst for treating carbon monoxide (CO) and hydrocarbons (HCs) in exhaust gas from the compression ignition engine, wherein the oxidation catalyst comprises: a platinum group metal (PGM) component selected from the group consisting of a platinum (Pt) component, a palladium (Pd) component and a combination thereof; an alkaline earth metal component; a support material comprising a modified alumina incorporating a heteroatom component; and a substrate, wherein the platinum group metal (PGM) component, the alkaline earth metal component and the support material are disposed on the substrate.

A method for extending the service life of a Collective Protection (CP) filter includes: providing at least one CP filter comprising a filter bed; and passing an airstream through a guard bed configured to protect the filter bed by removing one or more of airborne contaminants and battlefield contaminants. An apparatus for extending the service life of a CP filter includes: a CP filter comprising a filter bed; and a guard bed configured to protect the filter bed by removing one or more of airborne contaminants and battlefield contaminants.

A sorbent container includes a plurality of sealed pockets connected in a strip. At least one of the pockets is a filled pocket containing a quantity of sorbent material. A pocket adjacent to the filled pocket is empty.

The present invention relates to the description of machine-assisted production assemblies and to the optimization thereof, said assemblies having, built therein, a patented device for folding into deep coated folds, thus making it possible to create paper packaging for fast food, said assemblies all comprising a folded element from a folded paper strip 31. Said machines are modular and all comprise, upstream, an assembly of modules 5, 6, and 7 that supply a folded paper strip 31 that is then converted in a specific finishing module 8 for making, from said lidded paper strip, a packaging for a sandwich or loose product such as fries or chicken pieces.

An inflatable structure may be formed from a single piece of flexible film using a provided method of manufacturing. The inflatable structure may include quilting seals which divide the inflatable chamber. The inflatable structure may also include an external valve opening extending through multiple layers of the flexible film. The external valve opening may further be partially defined by edge portions of the flexible film formed by folding the flexible film. The external valve opening may be configured to align with an opening in a container or an inflation aperture in a pouch so that the inflatable structure can be inflated while inside the container/pouch. A corresponding inflation device fills the inflatable structure with air and may do so without requiring heat sealing or contact between the inflatable structure and outlet of the inflation device. A hinged plate apparatus may assist in directing air into the external valve opening.

In an embodiment of the disclosed technology, a bag is used for transporting and organizing items. The bag is generally formed of a removably attachable upper and a lower portion. The upper portion forms at least a portion of one side of the bag and is attached to the lower portion by a fastening mechanism. The lower portion forms the bottom and at least a portion of the sides of the bag. The upper portion is detachable to provide a hanging accessory organizer, having pockets and suspension device. In embodiments of the disclosed technology, access to the bag may be provided by an additional fastenable opening. Zippers may be used as the fasteners, and may run parallel to one another, completely or partially surrounding the perimeter of the upper portion.

The present invention regards a package (1) for food products comprising a flexible container (2) having a first wall (5) and a second wall (6) opposite each other and peripherally sealed along at least the respective side edges (5a, 6a, 5b, 6b), a space (8) inside said walls containing, optionally in sterile conditions, a food product (73), and a gusset element (10) extended between the upper edges (5c, 6c) of said first wall (5) and of said second wall (6), said gusset element (10) defining a pocket (14) turned towards the interior of said flexible container (2), characterized in that it comprises an opening and closing device (3) housed in said pocket (14) and constrained to said flexible container (2), said opening and closing device (3) comprising a pourer body (15) associated with an opening and closing cap (16), and cutting means (42) suitable to perforate said flexible container (2) at the time of the first opening of said packaging (1). The invention also regards a method for packaging a food product, in particular in sterile conditions, in a package of the aforesaid type, a flexible container for a package of the aforesaid type as well as a method for producing such container.

A packaging device allowing for the distribution, storage and cooking of various food products, such as perishable or frozen food product(s). The packaging device includes a plurality of micro-perforations that may promote the extended shelf-life of the perishable food product and the maintenance of the quality of the perishable food product or be configured to maintain the integrity of a frozen food product. The packaging device also includes a venting system that allows the cooking of the perishable or frozen food products within the packaging device.

This device for locking an opening part (9) of a jet engine nacelle with respect to a fixed part (7, 17) comprises: means (13, 16) for locking said opening part (9) with respect to said fixed part (7, 17), means for actuating (21) these locking means that are mounted such that they can move on said opening part (9) between a closed position, in which they enable said locking means (13, 16) to be immobilized, and an open position, in which they enable these locking means (13, 16) to be released. Said actuating means comprise gripping means (21). This device comprises means (41, 43) for immobilizing, in the open position, said gripping means (21) with respect to said opening part (9) at least in the direction of movement of said opening part (9).

A pallet changing device (40) for changing pallets on a machine tool comprises a changing device (15) including connecting elements (26, 28) for releasably connecting the pallet changing device (40) to pallets (7, 8), a rotational drive (19) for rotating the changing device (15) in a working plane (18), and a lifting device (20) for raising and lowering the changing device (15) and thus the working plane (18) within a workspace (21). The rotational drive (19) is arranged outside the workspace (21).

A system and method for modifying a gas turbine engine in the field to drill a series of cooling holes in a turbine rotor disk made of a superalloy. A portable field repair system includes a stand configured to receive, support, and position a turbine rotor disk, a drill having a self-feeding spindle and configured to automatically drill a predetermined depth through a superalloy and to automatically stop upon completion, a drill guide configured to coordinate the drill with a plurality of radial axes associated with a precise hole pattern to be cut and a drill mount configured to mechanically couple the drill to the drill guide and to position the drill during the modification of the gas turbine engine turbine rotor disk.

A method of chip-removal machining a tooth gap of a work piece includes executing a first substantially linear plunging movement of the cutting tool along a first plunge vector and machining a region of the work piece near a tooth head of a first tooth flank of the tooth. A substantially transverse movement of the tool along a transverse vector is then executed to machine a region of the work piece near a tooth head of the second tooth flank of the tooth. A second plunging movement of the cutting tool along a vector path is then executed, to an end point of the second plunging movement that lies at a position of the work piece corresponding to the slot depth of the tooth gap to be fabricated. The cutting tool is rotated about an axis of rotation thereof during execution of these steps.

A seal assembly between a disc cavity and a turbine section hot gas path includes a stationary vane assembly and a rotating blade assembly downstream from the vane assembly and including a plurality of blades that are supported on a platform and rotate with a turbine rotor and the platform during operation of the engine. The platform includes a radially outwardly facing first surface, a radially inwardly facing second surface, a third surface, and a plurality of grooves extending into the third surface. The grooves are arranged such that a space is defined between adjacent grooves. During operation of the engine, the grooves guide purge air out of the disc cavity toward the hot gas path such that the purge air flows in a desired direction with reference to a direction of hot gas flow through the hot gas path.