Abstract: A tooling fixture is disclosed that includes a weldment having spaced apart lateral members interconnected by opposing side members. Spaced apart trunnions support the side members for rotation about an axis, in one example. A locating pin is arranged between each side member and trunnions to enable quick and accurate location of the tooling fixture relative to the trunnions. The pins are at a right angle relative to the axis, in one example. Tooling plates are removable secured to each of the lateral members. Adjustable brackets are secured to the tooling plates and support tooling that cooperates with a workpiece supported on the tooling fixture. In one example, jack blocks, shims, squaring plates and stops are used to permit precise adjustment and repeatable relocation of the tooling in three directions.

Abstract: A tooling apparatus for positioning end effector tooling for engagement with a workpiece to facilitate the performance of work operations on the workpiece. The apparatus includes an elongated rectangular tubular backbone member, a plurality of tubular collars positioned over and secured to the backbone member at predetermined longitudinally spaced locations along the backbone member, and a plurality of support structures secured to a side of one or more of the collars utilizing a plurality of fasteners engaging apertures in the collars and aligned apertures in the underlying backbone member.

Abstract: A hydraulic subassembly is preassembled outside the vehicle into which it is later installed, using an assembly tool. The components of the subassembly are fastened in predetermined positions on the assembly tool, following which hydraulic connections are made between the components. The completed subassembly is fastened to a pickup tool and then disconnected from the assembly tool, allowing an assembly operator to lift the subassembly away from the assembly tool and carry it to the vehicle for installation. The pickup tool is also used to position and hold the subassembly within the vehicle while the subassembly is being connected to hydraulic systems on the vehicle. Following installation of the subassembly, the pickup tool is unfastened from the subassembly and removed from the vehicle.

Abstract: In one embodiment, an apparatus for constraining an object includes a first clamping surface configured to apply a first holding force to a first surface of the object; a second clamping surface configured to apply a second holding force to a second surface of the object; and an actuator configured to selectively move the second clamping surface relative to the first clamping surface.

Abstract: A plasma processing system for processing a wafer is provided. The system includes an electrostatic chuck (ESC) positioned inside a plasma processing chamber and configured to support the wafer. The ESC includes a positive terminal for providing a first force to the wafer and a negative terminal for providing a second force to the wafer. The system also includes a first circuit arrangement configured to measure at least a first voltage for determining a value of a positive load current applied to the positive terminal. The system further includes a second circuit arrangement configured to measure at least a second voltage for determining a value of a negative load current applied to the negative terminal. The system yet also includes circuitry configured to adjust a bias voltage using the values of the positive load current and the negative load current for balancing the first force and the second force.

Abstract: The invention relates to a device (11) for handling an article (13) such as a coil spring, and to an installation for handling an article. The device (11) comprises a body (10) having an internal housing (12) suitable for containing said article (13), said housing (12) presenting at least one open end (10A, 10B) and a constriction zone (14) that is suitable in a stable state, in which said constriction zone (14) presents a reduce dimensions (D14X) that is reduced in a first direction (X), for retaining said article (13) inside the body (10), and for being deformed to adopt a deformed configuration enabling said article (13) to be inserted into the housing (12) or enabling said article (13) to be extracted from the housing (12). The installation includes force-application means for acting on the device to change it between its stable state and its deformed configuration.

Abstract: A device for fixing at least one workpiece on at least one workpiece carrier is disclosed. The device has at least one engaging and fixing element designed as a mold for releasable arrangement between the workpiece and the workpiece carrier, where at least one first mold surface is designed for receiving a first volume of adhesive and for fixing an adhesive surface of the workpiece to the engaging and fixing element. At least one second mold surface of the engaging and fixing element is designed for receiving a second volume of adhesive and for fixing a contact and adhesive surface of the workpiece carrier to the engaging and fixing element. A method for machining workpieces is also disclosed.

Abstract: An alignment apparatus and method for aligning work pieces. The alignment apparatus includes a base member and at least on adjustable leg that extends from the base member. The alignment apparatus additionally includes a vacuum plate mounted to the adjustable leg. The alignment apparatus also has a an actuator mounted to the base member wherein the actuator includes a shaft extending therefrom. The alignment apparatus includes an attachment member connected to the shaft.

Abstract: Provided is a positioning apparatus including: a reference member that is serving as a reference for positioning; a support part that supports the reference member; and a first fixing member provided on the support part that fixes the reference member and the support part or releases the fixing. The reference member is connected to the support part in a movable state and fixed to the support part by the first fixing member after a position is determined. The reference member of the positioning apparatus is precisely installed to a reference position.

Abstract: A method for shielding discarded or unwanted items provided with a Radio Frequency Identification (RFID) tag, comprises the following steps. First, a facility containing an inventory including a plurality of products each including a radio frequency identification (RFID) tag is provided. Then, the facility is provided with an RFID waste collection container defining a magnetic shielding enclosure for shielding and electromagnetically isolating the RFID tags when the products are disposed therein. Next, it is determined if one of the plurality of products is not wanted. Subsequently, the unwanted product is discarded by placing the unwanted product into the RFID waste collection container so that the RFID tag of the unwanted product does not interfere with ongoing activities in the facility by emitting errant signals.

Abstract: An apparatus and method for supporting a workpiece against a wall (wall or ceiling surface) in order to further mount the workpiece, typically on the wall or ceiling. This helping tool allows a single person to hold a workpiece in place(s) at an elevation while working on final installation. The disclosure includes a knuckle member which at least two generally orthogonal passages therethrough which receive bars having wall pads. The bars can be positionally adjusted within the passageways to preferably create the appropriate shaped “box” enclosure to hold the workpiece. The preferred shape enclosure is the smallest which will hold the piece the closest to the wall surface while being adjustable for different sized workpieces.

Abstract: A device mounter head and a device mounting method using the device mounter head are provided. The device mounter head includes: a cylinder block unit including at least one cylinder in which a piston unit moving along the at least one cylinder is disposed; a pressure control unit which controls pressure inside and outside the at least one cylinder so that the piston moves along the at least one cylinder based on the controlled pressure; and a nozzle which is connected to the piston unit, and includes an inlet exposed to an atmosphere outside the cylinder block unit and a nozzle communication vent connected to the inlet and provided with the controlled pressure, wherein the inlet is configured to suck, grab and release a component using the controlled pressure.

Abstract: A chuck device is disclosed having two or more jaws for gripping an object, and an adjustment mechanism for adjusting the rotational centre of the object gripped in the jaws. The adjustment mechanism can have two adjusting devices, which can adjust the position of the rotational centre of the gripped object after it has been gripped in the chuck, and optionally a sensor mechanism for detecting the position of the object gripped within the jaws. The chuck device can typically sense the actual rotational centre of the gripped device at the location to be cut, by obtaining the measurement information from the sensor devices, and can then move the rotational centre of the jaws gripping the object to ensure that the object is centred at the position to be cut, and not necessarily at the chuck.

Abstract: A method of operating a clamp (100) that includes a first clamping jaw (102), a support element (104) to which the first clamping jaw is attached and a trigger handle (118) pivotably mounted to a clamp body (112). The method includes actuating the trigger handle causing the first clamping jaw to experience incremental motion and varying the incremental motion as a function of a load encountered by the support element by varying an effective lever arm of the trigger handle by moving a fulcrum point into contact or out of contact with the trigger handle based on the load.

Abstract: A separating device with integrated storage securing an electrical charging device and providing wire management for portable computers, such as notebook computers or laptop computers, in a cart, pedestal, desk-mounted depot, or similar devices is shown herein. Briefly stated, in its preferred embodiment, the separating device comprises a sheet of rigid material with a thin thickness cut in a roughly trapezoidal profile, a plurality of holes, a plurality of tabs, and a plurality of slots. The separating device is designed to accept a portable computing device and its charging device. Wires running from the charging device to the portable computing device are fed through the separating device for wire management. Wires running from the charging device to a power plug are wrapped around the separating device for further wire management. Also, the separating device may be attached to a device capable of accepting the separating device.

Abstract: Management of the holding member that holds the semiconductor substrate is efficiently implemented. Provided is a holding member management apparatus that manages a substrate holding member that holds a semiconductor substrate in a manufacturing apparatus that manufactures a stacked semiconductor apparatus by joining a plurality of semiconductor substrates; comprising a history storing part that stores the usage history of the substrate holding member in association with identification information that specifies the substrate holding member and a holding member specifying part that specifies and outputs identification information of the substrate holding member whose usage is to be suspended based on the usage history stored in the history storing part.

Abstract: A quick-release vise utilizing one or more clamp shafts that can be easily re-configured to clamp with CW or CCW rotation of a clamp handle. The clamp shaft is received in a housing secured to the underside of a workbench, and is free to slide in and out. The clamp shaft passes through aligned holes in a pair of opposing jaws, at least one of which is moveable. A pinion freely slides on the clamp shaft within the housing and converts rotational movement from the clamp shaft into linear movement via a meshing rack gear. The linear motion actuates a bridge which slides against a laterally fixed wedge causing the bridge to displace a locking element which clutches and moves the clamp shaft to affect clamping between the jaws. The wedge and bridge pair can be inverted to allow clamping to occur with a either CW or CCW rotation of the clamp handle and/or re-oriented to cause a spreading motion between the jaws rather than a clamping motion.

Abstract: A method comprises loading a tooling module onto a module carrier unit, inserting the module carrier unit into a molding press so that the carrier unit rests on a supporting member of an injection molding press, and closing the molding press until the tooling module is mated to an ejection side of a mold base.

Abstract: A machine is provided for making a fluid level sender assembly having a first mounting member with a flange and a fluid level sender including a second mounting member that telescopically connects with the first mounting member. The machine has a base, a holding member to support the first mounting member, a head member having an outer ring configured to rotate the flange, the head member moving between a first and second position to allow placing the first mounting member on the holding member and a second position to allow the outer ring to rotate the flange and a sensor receiving member to engage the fluid level sender. The sensor receiving member may move with respect to the holding member to telescopically position the fluid level sender and the plurality of different longitudinal positions such that a plurality of differently sized fluid level sender assemblies can be constructed.

Abstract: A clamping mechanism is described which includes an end clamp which may include a face plate, a pair of opposing first jaws operably attached to the face plate selectively positionable toward and away from one another, each of the pair of first jaws having a first jaw inner clamp member and a first jaw outer clamp member forming a nest there between, and a pair of opposing second jaws operably attached to the face plate selectively positionable toward and away from one another, each of the pair of second jaws having a second jaw inner clamp member and a second jaw outer clamp member forming a nest there between.

Abstract: A mandrel for manufacturing a stent from a single wire includes a cylindrical member having a plurality of pins at a proximal end region, a plurality of pins at a distal end region, and a plurality of indentations between the proximal pins and the distal pins. These indentations form a helical pattern on the outer surface of the cylindrical member. The single wire is wrapped around every proximal pin and distal pin on the mandrel by following the indentations in the mandrel. The single wire is slid through the indentation under any crossing section of wire and over the next crossing section of wire in an under-over pattern.

Abstract: An apparatus for securing a cap onto a cylindrical container includes a main stage and three clamps. Each of the clamps is pivotally attached to the main stage and rotatable about a respective axis of rotation. The axes of rotation of the clamps define an outer circle having a center. Each of the clamps comprises a generally planar body and an arcuate edge and can be used to both center a cap and grip and rotate a vial for attachment of the cap.

Abstract: A fixture for final finishing flange faces of a hub of a knuckle assembly includes a mounting surface, a drive arrangement and a clamping arrangement. The drive arrangement is operative for engaging and rotating the hub of the knuckle assembly relative to the remainder of the knuckle assembly. The drive arrangement includes a drive member extending along a drive axis. The drive member is rotatable about the drive axis. The clamping arrangement is carried by the mounting surface. The clamping arrangement radially surrounds the drive arrangement and is operative for clamping the fixture relative to the mounting surface. The clamping arrangement includes a housing, a piston assembly radially positioned between the housing and the drive member, and a clamping sleeve radially disposed between the piston assembly and the clamping sleeve. The piston is movable in a first direction generally parallel to the drive axis.

Abstract: It is an object of the present invention to provide a workpiece holding method which enables a workpiece to be held when a multi-fingered hand is used to grasp the workpiece that is in an untidy heap, even if a target workpiece is subject to interference from another workpiece, and thereby the method enhances the success rate for holding the workpiece.

Abstract: A fixture that allows for quickly preparing, painting and finishing a plurality of door panels that have opposed side surfaces interconnected by a relatively narrow edge. The fixture includes upper and lower horizontal support bars. A plurality of spaced vertical support bars extend between and are slidably attached to the upper and lower horizontal support bars so that the spacing between vertical support bars may be adjusted to accommodate the size of the door panels. A plurality of mounting stations are on the vertical supports. A pair of pins are received by the mounting stations and engage the opposite edges of a panel for pivotal movement, painting and finishing of the panel there between.

Abstract: An apparatus and associated method for orienting a workpiece during processing. A fixture supports the workpiece adjacent a noncontacting biaser. At least one of the fixture and the biaser are selectively movable in a first direction with respect to the other. The biaser directs a first magnetic force capable of moving the workpiece relative to the fixture in a different second direction without physical contact between the biaser and the workpiece during a travel path segment of movement between the fixture and the biaser. The biaser further directs a second magnetic force capable of moving the workpiece relative to the fixture in a third direction. that is different than the second direction, without physical contact between the biaser and the workpiece during a subportion of the travel path segment of movement between the fixture and the biaser.

Abstract: An edge-handling chuck, a system for holding and rotating a test substrate at a high speed and a method for chucking a rotating substrate are disclosed. The Chuck includes a plate having a central axis, a fluid opening and a top surface with a varied topography characterized by symmetry about the central axis. The topography is such that a volume flow rate of fluid between the fluid opening and a periphery of the top surface sufficient to counteract substrate sagging is significantly less than a volume flow rate needed for a similar but flat-surfaced chuck to similarly counteract such sagging. The system may further include a spindle motor and a gas system that supplies gas through the fluid opening to a gap between the top surface and a back surface of the substrate. A radial velocity of the fluid through the gap is approximately constant.

Abstract: A method of manufacturing an optical lens, the method comprising the steps of blocking a lens member at a first positioning on a blocker; determining the first positioning of the lens member with respect to the blocker; comparing the first positioning of the lens member with a predetermined positioning in order to determine a positioning error between the first positioning and the predetermined positioning; determining a surface positioning of the surface to be manufactured with respect to the blocker according to the positioning error; and configuring operational parameters of a lens manufacturing tool in order to manufacture a surface according to the determined surface positioning such that the desired optical properties of the optical lens are respected. The invention further relates to an apparatus for manufacturing an optical lens.

Abstract: A cassette changing device for a microtome has a housing having a loading opening, a transfer opening and an unloading opening. The openings are arranged with respect to each other linearly in the housing. A slide is disposed in the housing linearly movably between a first position and a second position and has a first receiving compartment and a second receiving compartment. The first and second compartments are aligned with respect to each other so that, in the first position of the slide, the first compartment and the second compartment are respectively aligned with a first two of the openings and, in the second position of the slide, the first compartment and the second compartment are respectively aligned with a second two of the openings.

Abstract: An automobile run channel installing method for installing a run channel in a sash of an automobile door is provided. The method involves setting a run channel to a conveyance device having only a pair of arms, the run channel having a concave section and only two corner sections; pushing both corner sections of the run channel into corner sections of an upper portion of the sash, respectively; pressing and fitting an upper-sash roller of the arm into the concave section of the run channel to move from the corner section of the upper sash; and pressing and fitting a lower-sash roller of the arm into the concave section of the run channel to move from a higher portion to a lower portion of a lower portion of the sash and to fit the run channel into the lower sash.

Abstract: An end-of-arm tool having a workpiece interface tool is attachable to an articulable robotic arm. The end-of-arm tool can be configured by engaging an adjustable modular unit including a swing arm, a cylinder, and a workpiece interface tool to a rail element of the end-of-arm tool. The adjustable modular unit machine-slides in the rail element to a preferred x-axis position, machine-pivots to a preferred angular orientation, and machine-extends along a longitudinal axis of the cylinder to a preferred z-axis position, and machine-rotates to a preferred rotational angle about the z-axis.

Abstract: A method and apparatus are provided, for positioning a work piece, such as a piece of crown molding, through use of an apparatus including a work piece support plate pivotably attached along a pivot axis to a base. The base is adapted to rest on a horizontal reference plane, such as the table of a mitre saw, for pivoting motion of the support plate about the pivot axis to a desired angle with respect to the base, while the pivot axis is simultaneously positioned to extend substantially parallel to a longitudinal line of intersection between a horizontal and a vertical reference plane, established by the table and fence of the mitre saw, to hold the work piece at a desired tilt angle with respect to the vertical reference plane, so that the work piece may be cut in substantially the same orientation as it will be mounted.

Abstract: A workpiece machining method includes attaching a workpiece to a workpiece support with the aid of joining means. The workpiece and the workpiece support are joined to one another by an annular joining means. The composite produced is machined. The machined workpiece is separated from the workpiece support.

Abstract: A microtome comprises a histological cassette support member that is adapted and configured to allow the microtome to be used in connection with relatively thin histological cassettes. A method of reversibly altering a microtome for use with different size histological specimen cassettes includes providing a microtome comprising a first histological tissue cassette clamp, providing a second histological tissue cassette clamp, securing the second histological tissue cassette clamp to the microtome via the first histological tissue cassette clamp, and securing a histological tissue cassette to the microtome via the second histological tissue cassette clamp when the second histological tissue cassette clamp is secured to the microtome via the first histological tissue cassette clamp.

Abstract: A wafer holding apparatus for holding a wafer in a semiconductor fabrication apparatus includes a stage having a wafer receiving area with a large number of apertures. A gas, supply source supplies gas to the apertures to levitate the wafer by gas pressure. The levitated wafer is held in contact with a retainer disposed above a peripheral part of the wafer receiving area by the gas pressure, which the retainer resists. The wafer is thereby held securely even when the stage is moved, and the surface configuration of the wafer is not affected by the presence of foreign matter between the wafer and stage.

Abstract: An apparatus for processing a medical stent that includes a holding device for holding a stent and a processing device for processing the stent held by the holding device that includes a first chamber for a fluid medium adapted to exert pressure around the stent. The first chamber for the fluid medium at least partially surrounds or encompasses the stent in the holding device that may include a housing which substantially encloses the first chamber for the fluid medium. A method of processing a medical stent is described. The method may include holding a stent with a holding device, and processing the stent with a processing device while holding the stent with the holding device. Holding the stent may include pressurizing a first chamber for a fluid medium to exert pressure around the stent. A method of producing or manufacturing a stent according to this method is described.

Abstract: A scrapbooking page alignment device for temporarily aligning at least two adjacent scrapbook pages having retention receivers extending from their respective spine edges, the device comprising (i) a base; and (ii) two or more spaced retention posts extending from said base; where said retention posts are dimensioned to temporarily receive the retention receivers of the two adjacent scrapbook pages.

Abstract: A workpiece hold-down clamp for securing a workpiece to a fixture plate, the workpiece hold-down clamp comprising: a clamp post for mounting to the fixture plate; and a clamp finger which is adjustably mounted to the clamp post, wherein the clamp finger is configured for selective movement along the clamp post, and wherein the clamp finger comprises a portion for engaging the workpiece; wherein the clamp finger comprises a cantilever beam which is flexible.

Abstract: The present invention relates to a method and apparatus to be used when welding two abutting sections of pipe or tubing, and also to purge blocks for establishing a localized inert atmosphere inside two abutting pipe sections in the region of a desired weld joint. The present invention comprises an inflatable bladder with elongated engaging members that can be removable positioned within the ends of two abutting pipe sections in order to center the two abutting sections of pipe and create the purge block.

Abstract: A method and apparatus for removing the lowest workpiece from a stack of a plurality of substantially similar workpieces. A horizontal shuttle has a lip on its edge, and is driven in one direction to remove the lip from a void beneath the stack, thereby permitting the stack to fall. The lowest workpiece drops into the void, and the next higher workpiece rests on the upper surface of the shuttle lip. The shuttle is subsequently reversed to drive the workpiece into a slot in a vertical clamp body. The clamp body is driven downwardly, thereby driving the workpiece downwardly, to be acted upon by a secondary device, such as a conventional degating apparatus.

Abstract: A part hanger is provided that engages a part being treated in a manner that orients the part so that treatment liquid tends to drain from the part. To this end, a part hanger is provided that is configured to suspend a part for treatment with a liquid. The part hanger includes one or more elongate members formed into a substantially U-shape having first and second side legs connected by a bottom leg. The first leg is configured to support a portion of the part from below at a first leg distal end. A hanger extension is connected at one end to a second leg distal end. The hanger extension is disposed substantially parallel to the bottom leg and terminates at a hanger extension distal end in a mounting feature. The hanger extension terminates prior to contacting the first leg distal end such that the first leg distal end and the mounting feature define a part clearance gap through which at least a portion of the part may extend into the U-shape.

Abstract: An optical fiber ribbon holding member capable of readjusting a position of an optical fiber ribbon without requiring a heating operation is provided. A holding member main body that has a U-shaped cross section and a space to which a plurality of optical fiber ribbons can be accommodate in a laminated state, and a lid body an opening surface of which has a reverse U-shaped cross section are employed. A latch structure is formed on wall portions of a lid body and a holding member main body, and engages to each other when the lid body covers the holding member main body. Heating operation is not required, and the optical fiber ribbons are held by only a simple operation of covering the lid body, so that the operation of holding the optical fiber ribbons is easily performed and readjustment of the position of the optical fiber ribbons can be performed.

Abstract: The present invention provides a clamping device for a vehicle body transfer cart, in which a rotation unit for rotating a cart unit, an air supply unit for supplying air to the cart unit, and an electrical signal unit for transmitting an electric signal to the cart unit are installed in a single processing device such that the structure of the device is simplified, the number of components is decreased to reduce manufacturing and installation costs, the structure of the cart unit is improved to be suitable for the clamping device, and thus the weight of the cart unit is reduced.

Abstract: A device for maintaining a plurality of doors in an upright and spaced position for treatment is provided. The device comprises a body with a plurality of radially extending hinge plate connectors each for connecting to a respective hinge plate. Also provided is a kit for assembling the device and a method for maintaining a plurality of doors in an upright and spaced position for treatment.

Abstract: A workpiece clamp comprising: a body; a workpiece-engaging spring edge connected to the body; and an opening for accepting a screw for securing the body to a fixture plate.

Abstract: A measuring chip installation/removal device of the present invention secures and removes a measuring chip to and from the top surface of an SPR measurement device that measures a specimen in the measuring chip by surface plasmon resonance. The measuring chip installation/removal device includes: a chip carrier on which the measuring chip is mounted; a chip carrier guide that guides the chip carrier on the top surface; and a first magnet provided in the chip carrier, and a second magnet is provided in the chip carrier guide. Orientation of a magnetic force received by the first magnet from the second magnet is reversed by displacing the chip carrier guide, so that the chip carrier is secured to or removed from the top surface.

Abstract: A lower tool frame is used in manufacturing a plurality of convertible roofs. Structural roof parts are disposed in the lower tool frame upside down with respect to their use position. Forward connection parts are provided for selectively connecting the forward end of the convertible roof to a windshield frame and rearward connection parts are provided for attaching the rearward end of the convertible roof to a vehicle body. A single upper tool frame is lowerable onto the lower tool and is used to position the forward and rearward connection parts with respect to the structural roof parts. The single upper tool frame is used to assemble all of the convertible roofs for a series of vehicles.

Abstract: A panel loading method for loading an inner panel to an outer panel that has a bent portion provided by bending a periphery thereof, the outer panel and the inner panel being overlapped to integrate the outer panel and the inner panel at the periphery thereof. The method includes: providing at least one of the outer panel and the inner panel by an elastic body; disposing the outer panel onto a panel receiver so that the bent portion is directed upward; placing a guide plate on or above the bent portion; loading the inner panel into the outer panel from above the guide plate; and inserting the inner panel into an inside of the bent portion.

Abstract: A holding assembly for an edge of a flexible film sheeting where the assembly comprises an elongate flexible channel member for extending along the edge and an elongate locking strip detachably engagable within the channel member for clamping the associated film sheeting therebetween has the locking strip moved into place by a guide body arranged for sliding movement across a support surface such as the ground on which the film sheeting is located. The guide body having a slot therein for receiving the channel member and carries a pivotal lever including a pair of rollers for guiding and forcing the locking strip into place. The guide body is carried on a skid and moves underneath the edge of the film across the width of the opening to be closed.

Abstract: A vacuum hold-down system for use with workpieces of various shapes and/or sizes is disclosed. The system comprising a vacuum hold-down table defining a mask support plane and an apertured vacuum table mask which is selectably positionable on said mask support plane, wherein said vacuum hold-down table and said vacuum table mask is configured to define a plurality of selectable different contiguous arrays of vacuum apertures, by suitable relative positioning of said vacuum table mask and said vacuum hold-down table in said mask support plane.