Abstract: For the defects that manual adhesive tape pasting is low in efficiency and high in cost, and it is difficult to automatically paste adhesive tapes at specified positions of inner and outer surfaces of an item according to a certain length through a handheld box sealer and an adhesive tape seal pasting mechanism, a cantilever type plane automatic adhesive tape pasting device is invented. A liftable two-stage telescopic cantilever adhesive tape pasting head structure, a roller type automatic adhesive tape feeding structure, an adjustable fixed-length cutting structure and a roller type pasting structure are adopted for the device to achieve the automatic adhesive tape pasting on inner and outer side planes of an item. After the item needing adhesive tape pasting is positioned, the pasting process is completely automatically conducted without manual participation, the labor intensity is reduced, the labor efficiency is improved.

Abstract: A protective device, in particular a safety toe cap, for use with an article of footwear is provided. A safety toe cap of the present technology includes one or more strain hardened portions configured to strengthen or reinforce sections of the safety toe cap against impact, particularly from above. The one or more strain hardened portions have increased strength in relation to adjacent non-strain hardened portions and therefore may maintain adequate protection of a user's toes and foot, while simultaneously allowing for lowered material use and a device with a lightweight, streamlined profile.

Abstract: A footwear article is provided having an upper and a wear guard arranged across a vamp of the upper. In one embodiment, the wear guard is configured with a grid pattern of raised articulations extends entirely across a width of the vamp. In another embodiment, the footwear article also include a heel guard positioned above a heel region of the upper. In yet another embodiment, a tab may be coupled to the heel guard.

Abstract: A transfer printing apparatus includes a mold, a stamper, a pressing roller and a curing unit. The mold has a first surface with first and second concavities, the second concavity has first and second planes, the first plane is perpendicular to the first surface, and the second plane is inclined to the first surface. The stamper having a second surface is disposed in the first concavity. The first and second surfaces are coplanar, and the second surface has transfer printing microstructures. The first and second surfaces are suitable for coated an adhesive layer. The pressing roller presses a base film onto the adhesive layer, such that the adhesive layer is integrated with the base film. The curing unit cures the adhesive layer on the base film, such that a taper corresponding to the second concavity and optical microstructures corresponding to the transfer printing microstructures are formed on the adhesive layer.

Abstract: Fibre fabric cutting system and method with a first and a second conveyor belt guided along a first and second curved path, respectively. A fibre fabric supply unit supplies a web of fibre fabric to a cutting section of the first curved path. A cutting unit cuts the web of fibre fabric into sheets. The first curved path and the second curved path cooperate to define for the sheets a first transport path including a plurality of vertically spaced levels extending transversally to the vertical direction and arranged one above the other. The cutting section defines the first level and each of the subsequent levels is defined by a section of one of the conveyor belts. Sheets transported along the first transport path move from one level to the next level and are alternately supported against the gravitational force by the first and the second conveyor belt on consecutive levels.

Abstract: An apparatus for forming absorbent cores (54) that include absorbent pads (50) of cellulose fluff and superabsorbent polymers, comprising a forming section (12) configured for forming a continuous moving chain (52) of absorbent pads (50) oriented in a direction transverse with respect to the direction of movement (X) of the chain (52), the forming section (12) comprising a dispenser device (56) configured for applying superabsorbent polymers on said absorbent pads (50) oriented in a transverse direction at a variable concentration in a direction (Y) transverse with respect to said direction of movement (X) of the continuous chain (52).

Abstract: A method for applying an elastomer on a sheath (2) includes the step of applying by pad-printing an elastomer layer on a portion (20) of the sheath (2). A pad-printing machine (1) is also provided for implementing the method. The invention can particularly be used for textile sheaths used in the protection of exhaust-gas flow pipes in an automobile.

Abstract: This disclosure discloses an adhesive tape printer comprising a housing, a first storage part configured to receive a first roll provided to one side of the housing in the first horizontal direction, a feeding roller, a printing head, a second storage part configured to store a second roll wherein the adhesive tape with print is wound around an axis line in the second horizontal direction, provided to the other side of the housing in the first horizontal direction, a feeding motor provided further on the other side than the first storage part and further on the one side than the second storage part so that an axis direction of an output shaft matches the second horizontal direction, a first opening/closing cover provided to an upper part on the one side, and a second opening/closing cover provided to an upper part on the other side.

Abstract: The disclosure discloses an adhesive tape cutting apparatus. The apparatus includes a feeding roller configured to feed an adhesive tape, a guide plate configured to contact and guide a surface of the other side end of the adhesive tape, a movable blade configured to advance from the adhesive layer and cut the adhesive tape, disposed below the guide plate so that a blade edge of the movable plate vertically faces the guide plate, a travel mechanism for causing the movable blade to travel along the tape width direction along the guide plate, and a movable blade support device configured to support the movable blade with respect to the travel mechanism in the manner that the movable blade slopes so that the blade edge presses the adhesive tape to the guide plate in the travel direction along the tape width.

Abstract: Head for the automatic positioning of fiber blankets, which determines a path for the fiber blanket (2) to be positioned, as far as a positioning zone (5), passing via a resin-impregnation zone (4) and via a cutting zone (3), including, in front of and behind said zones (3 and 4) individual sets of rollers (6-7) that convey the fiber blanket (2) and control the tension thereof.

Abstract: A liquid discharge apparatus includes a transportation portion which transports a medium in a transportation direction, a cutting portion which moves in an intersection direction intersecting with the transportation direction and cuts the medium, and a head portion which is provided so as to be aligned with the cutting portion in the intersection direction, has a cutout portion on which the cutting portion is arranged, moves in the intersection direction and discharges liquid onto the medium.

Abstract: The present disclosure provides a method and apparatus for coating a medical device.

Abstract: A manufacturing method and apparatus of an organic resin coated metal sheet is provided. Temperatures of edge portions of the metal sheet and a temperature of an approximately central portion of the metal sheet are respectively measured using a metal-sheet temperature measuring device arranged directly upstream of lamination rolls. Respectively measured temperature values are inputted to a heating temperature controller, and output values calculated by the heating temperature controllers are inputted to a metal sheet center portion heater and the metal sheet center portion heater, respectively, to control the heating of a widthwise approximately center portion and edge portion, respectively, to a first and second temperature, respectively, the second temperature being higher than the first. A resin film is extruded to pre-rolls and is sandwiched and pressure-bonding to the metal sheet between a pair of lamination rolls. Resin portions projecting from both edge portions are then removed.

Abstract: A printer has a printer unit including a recording head and automatic cutter, and an adhesive transfer unit disposed downstream from the automatic cutter. The adhesive transfer unit has a transfer mechanism that supplies adhesive tape and transfers adhesive to recording paper at a transfer position. When a paper detector disposed upstream from the transfer position detects recording paper, the control unit of the printer causes the pressure mechanism to alternately form the contact state pressing the recording paper to the adhesive tape, and the non-contact state in which the recording paper is separated from the adhesive tape. Adhesive is transferred to the recording paper passing the transfer position while this contact operation repeats intermittently.

Abstract: An apparatus for producing a three-dimensional shaped product in which a powder and a shaped article are loaded on a base plate, a frame body is installed upright on a table, a support projecting from the frame body and/or a projected streak provided at the top of the frame body are used to support the base plate, the base plate is supported by arranging the center of gravity of the base plate so as to be present, two or more recesses provided at the back of the base plate are fitted into two or more supports which cross each other and/or projected streaks, and projected parts provided on supports and/or wall parts of the frame body are contacted with horizontally surrounding parts of the base plate on both sides in the longitudinal direction of at least one recess among the recesses, thereby attaining the above object.

Abstract: A transistor is formed by applying modifier coatings to source and drain contacts and/or to the channel region between those contacts. The modifier coatings are selected to adjust the surface energy pattern in the source/drain/channel region such that semiconductor printing fluid is not drawn away from the channel region. For example, the modifier coatings for the contacts can be selected to have substantially the same surface energy as the modifier coating for the channel region. Semiconductor printing fluid deposited on the channel region therefore settles in place (due to the lack of a surface energy differential) and forms a relatively thick active semiconductor region between the contacts. Alternatively, the modifier coatings can be selected to have lower surface energies than the modifier coating in the channel region, which actually causes semiconductor printing fluid to be drawn towards the channel region.

Abstract: A method for applying an elastomer on a sheath (2) includes the step of applying by pad-printing an elastomer layer on a portion (20) of the sheath (2). A pad-printing machine (1) is also provided for implementing the method. The invention can particularly be used for textile sheaths used in the protection of exhaust-gas flow pipes in an automobile.

Abstract: A method of manufacturing roofing shingles including the steps of coating a continuously supplied shingle mat with roofing asphalt to make an asphalt-coated sheet, the asphalt-coated sheet having at least one prime region, applying alternate granules onto the at least one prime region, applying prime granules over the alternate granules to form a granule-covered sheet, and cutting the granule-covered sheet into shingles.

Abstract: A thermally activated pressure sensitive adhesive is provided and a substrate includes the thermally activated pressure sensitive adhesive applied to one side of thereof. A method and system for include forming a pressure sensitive adhesive coated substrate using a thermally activated pressure sensitive adhesive coated substrate.

Abstract: One possible embodiment of the invention may be an apparatus and process for making papier-mâché. One possible version of the apparatus may comprise an open top container forming a hollow interior capable of holding an amount of papier-mâché solution; a papier-mâché media dispenser, a portion of which can reversibly sit within the hollow interior of the open top container, the dispenser further comprising a pair of dispenser walls spaced apart in parallel opposing configuration by a plurality of pins that are located between the dispenser walls; a papier-mâché media holder, the holder reversibly located between the dispenser walls, wherein a strip could be pulled from media held by the holder and could be generally interwoven through the pins to generally present a portion of the strip to the solution present in interior of the container.

Abstract: The invention relates to a method for the impregnation of a product consisting of fibrous material and formed from a continuous web (22), the method comprising at least one first step of cutting out a specific zone (24) of the continuous web (22) and at least one second step of applying an impregnation product to the specific zone (24), the first and second steps being carried out simultaneously or virtually simultaneously.

Abstract: A method of manufacturing roofing shingles comprises the steps of: coating a continuously supplied shingle mat with roofing asphalt to make an asphalt-coated sheet, the asphalt-coated sheet having at least one prime portion and at least one headlap portion, varying the thickness of the asphalt-coated sheet such that the at least one prime portion of the asphalt-coated sheet has a first thickness and the headlap portion has a second thickness, the thickness of the asphalt-coated sheet being varied by passing the asphalt-coated sheet through compression rollers, applying granules onto the asphalt-coated sheet to form a granule-covered sheet, and cutting the granule-covered sheet into shingles.

Abstract: A foam-in-bag dispending system is featured with a dispenser with chemical output port, a film feed assembly which feeds film to the dispenser for receiving chemical output from the dispenser. The film feed assembly includes a film drive roller set which includes a first roller and a second roller rotating on non-coincident axes, an a support structure which supports the film drive roller set. The support structure includes a first frame structure and a second frame structure with the first frame structure supporting the first roller and being adjustable relative to the second frame structure so as to move said fist roller away from said second roller.

Abstract: An intermittently laying method for intermittently forming laid layers (14) comprising a fluidized substance (13) laid thereon on a surface of a sheet-like member (12) moving in one direction, in the moving direction, the method comprising steps of: folding a part of the sheet-like member (12) corresponding to a non-laid portion (15) between adjacent laid portions inwardly towards a back surface side of the sheet-like member (12) on an upstream side of a coating head (16) for laying the fluidized substance (13) on the sheet-like member (12) thereby forming a continuous surface-to-be-laid (30) on a surface side; continuously supplying the fluidized substance (13) from the laying means to the surface-to-be-laid thereby forming the laid layer (14); bringing back the inwardly folded non-laid portion (15) so as to be flush with the surface-to-be-laid (30) on a downstream side of the coating head (16); and intermittently interposing the non-laid portion (15) between continuously laid adjacent laid layers (14).

Abstract: The invention concerns a method and a device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter-winder, or in any other device for treatment of a web. In the event of disturbance, the web (P) is made to be wound in a controlled way around at least one web guide roll (18a).

Abstract: The invention generally provides a method of coating a material, the method including the following steps: (a) forming a generally elongate coating structure (15), the coating structure having an internal cavity (17) extending at least substantially along its length, and wherein the internal cavity of the coating structure is capable of receiving a core material (21); (b) inserting a core material (21) into the internal cavity (17) of the coating structure (15); (c) compressing the coating structure at a first location (44) along its length so as generally to form a seal at that location; and (d) compressing the coating structure at a second location along its length (45).

Abstract: The invention relates to a device for the application of a liquid medium onto at least one side of a moving material web, specifically a cardboard web, including at least one roll and at least one feed device for the coating medium, whereby during operation of the device a liquid sump forms between the roll and the web. Nozzle lips of a nozzle body of the feed device are configured so that the desired dimension of the open surface of the liquid sump and the depth of immersion of the nozzle lips into the liquid sump, and thereby the level of the liquid sump are adjustable. The nozzle lips are surrounded up to 80% of their total length by the liquid sump.

Abstract: The method relates to a disposable device for the application of a coating (2) on a tablet, a capsule or a pill. The coating (2) is applied enclosing the tablet, capsule or pill (3) during its passage through a bowl formation (4) with a coating mass (5) and through an elastic diaphragm (12) located in the bottom (11) and provided with a centrally disposed, conveniently penetrable opening (13). During the passage of the tablet, capsule of pill (3) the opening (13) encloses the tablet, capsule or pill and simultaneously shapes a film of coating mass (5) thereon.

Abstract: This invention provides a unitary nozzle for use in a taping apparatus. The unitary nozzle features a cradle section adjacent a tube receiving section and a flange for sealingly receiving a mastic tube. A mastic is extruded and contained along a path extending along one side of the tape and between a front and rear end of the nozzle.

Abstract: An edge banding apparatus (21) for adhesively securing banding material (28) to an edge of a board (27). The apparatus (21) includes a board support structure (22) formed to support a board (26) in a near vertical orientation with the edge (27) to be banded in a downwardly facing orientation. An adhesive applying assembly (23) is positioned relative to the board support structure (22) and is formed to apply adhesive (54) to the downwardly facing edge (27) during relative motion between the board (26) and the adhesive applying assembly (23). The apparatus (21) includes a banding material applying assembly (24) positioned downstream of the adhesive applying assembly (23) and formed to apply a banding material (28) to the edge after the adhesive (54) is applied and a cutoff assembly (25) which cuts off the banding material (28) as the banded board (26) passes the cutoff device (25).

Abstract: A tissue dispenser is disclosed which permits a user to choose from a variety of liquids to be sprayed on a tissue prior to dispensing. To prevent the tissue from dissolving or becomes too wet to handle comfortably, the dispenser folds the tissue into a double layered structure prior to spraying with the selected liquid, and sprays one layer of the two-layer structure just prior to dispensing so that the dry layer can support the paper's shape and enable the user to handle the tissue without tearing it.

Abstract: A method and device for manufacturing confectionery bars in the form of a three dimensional core at least partially covered with at least one layer of boiled sugar confectionery material. The method involves dimensioning at least one continuous band of boiled sugar confectionery material on a roller, cooling the band of boiled confectionery material, detaching the band from the roller, depositing the band on a core by bringing the band substantially into contact with the core on a plane that is adjacent to the most elevated surface or point of the core, and allowing the band to bend under its own weight to cover the sides of the core. The band is deposited in a viscoplastic state such that the band is capable of bending under its own weight.

Abstract: The invention generally provides a method of coating a material, the method including the following steps: (a) forming a generally elongate coating structure (15), the coating structure having an internal cavity (17) extending at least substantially along its length, and wherein the internal cavity of the coating structure is capable of receiving a core material (21); (b) inserting a core material (21) into the internal cavity (17) of the coating structure (15); (c) compressing the coating structure at a first location (44) along its length so as generally to form a seal at that location; and (d) compressing the coating structure at a second location along its length (45).

Abstract: A wallpaper dispensing apparatus includes a tray with a ridge projecting from the bottom and extending transversely between the side walls to divide the tray into a forward pool section and a rearward trough section. A removable cover is attached to the forward pool section and includes a pair of depressions with guide surfaces on the bottom, spaced above the bottom of the tray to form a passageway between the cover and tray bottom. the cover has a rearward portion following a portion of the ridge, and a straight rearward edge extending transversely across the tray. An opening in the cover, extending from the forward edge permits the user to draw a strip of wallpaper from a roll located in the trough, through the passageway between the cover and tray, and out the forward end of the tray. Water in the pool portion wets the wallpaper as it is drawn from the dispensing apparatus.

Abstract: An improved adhesive application assembly (70) for a labeling machine (2) includes an adhesive sprayer (76) which directs heated adhesive (88) towards labels (60) passing the adhesive application station (70). A moving heated adhesive shield (80) includes one or more windows (84), through which the adhesive is sprayed, surrounded by a heated overspray-intercepting surface (90). The intercepted adhesive is collected for reuse.

Abstract: A bitumen-based waterproofing membrane is provided with an improved edge for sealing with a contiguous membrane to provide a membrane system with improved waterproofing characteristics. A bitumen-based reinforced membrane sheet is coated with granular material to protect the membrane sheet from ultraviolet rays. However, a section of the membrane sheet is first covered with a piece of protective tape which prevents any granular material from being deposited on the lateral section of exposed bitumen beneath the tape. The membrane sheets are then cut immediately prior to the tape or at the edge of the granular coating and then rolled up. Accordingly, the lateral section of bitumen which is covered by the protective tape is on the innermost part of the rolled-up membrane sheet. During installation, the tape is removed and the exposed bitumen or selvage section is disposed below an adjacent or contiguous membrane. Heat is then applied for an easy and effective seal between two adjacent membrane sheets.

Abstract: A guide bar for a chain saw includes a pair of side plates and a center plate disposed therebetween. Each of the side plates includes spray holes through which a liquid can be sprayed. Liquid-conducting tubes are mounted in a longitudinal center slot of the center plate, and outlet ends of the tubes are connected to the spray holes of one of the side plates. Inlet ends of the tubes are connected to fittings mounted in a rear end of the guide bar to enable the tubes to receive liquid from a liquid source. A worn guide bar can be reversed, while still permitting the spraying to be performed. That is, while the guide bar is being reversed, the tubes are removed to enable the fittings to be reversed. Then, the inlet ends of the tubes are reconnected to the fittings, and the outlet ends of the tubes are connected to the spray holes formed in the other side plate.

Abstract: A glue sizing mechanism includes a container secured to the bottom of a pair of walls. A coil of sheet member is rotatably supported on the walls. A roller has the ends slidably engaged in the walls and a pair of cams are engaged with the ends of the roller for moving the roller up and down. A cover is pivotally secured to the walls for covering the roller and includes a panel having a groove for engaging with a knife. A rule includes two extensions secured to the walls for measuring the width of the sheet member.

Abstract: A web coating apparatus includes a supply roll of web and a wind-up spindle for receiving a discrete length of the web. Fluid is discharged from a coating die in a direction toward the wind-up spindle to coat the web as the web is wound about the wind-up spindle. A variable speed pump directs fluid through the coating die at flow rate that is proportional to the speed of advancement of the web. The apparatus is particularly useful for coating discrete lengths of orthopedic splinting and casting tape that is packaged for single patient use.

Abstract: The object of the invention is a colour-marking arrangement in the cutting flange of timber harvester. The arrangement includes a flange (1) with a carrier (6, 7), an adapted pipework (4), a series of channels (12) formed to the carrier (6, 7) and connected to the pipework (4), which ends opposite to the connector connections (11). The pipework (4) is formed from a separate component (4, 9, 10) from the flange (1), and is adapted to be set into the flange (1) in a space (3) reserved for it in the same way as the flange (1) is set into the carrier (6, 7) by means of a longitudinal movement.

Abstract: A combined joint compound bucket and tape dispenser comprising a cylindrical container with a removable cover. A roll of dry-wall construction tape is suspended at the top of the container beneath the cover by a rod extending through the center of the tape and engaging slots in opposite sides of the container. The container includes two slotted apertures on one side of the container and a third slotted aperture on the other side of the container. The tape is reeled from the rod, out through a first aperture, guided down along the outside of the container, back into the container at the second aperture adjacent the bottom of the container. The tape passes through mud deposited in the container and exits the container on the opposite side through the third aperture. The tape is thus coated with the mud and may be torn from the container on a serrated edge at the desired lengths. A removable guide rail is also provided to guide the tape from the first to the second apertures.

Abstract: An apparatus used in connection with the construction of a duroplastic, fiber-reinforced article a fibrous web which includes continuously impregnating the web under subatmospheric pressure with a liquid, curable resin composition whose viscosity is gradually increasing. The prepreg thus obtained is covered on both its major surfaces by thin polymer sheets, then cut into the desired length, vacuum molded, pre-cured in the mold and finally cured outside the mold. Construction parts, car parts and boat bodies may thus be produced.

Abstract: Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powder is flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings, having thicknesses of at least 10 microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking.

Abstract: Presented is an easily portable, compartmentalized apparatus for aiding in the preparation of prepasted wallpaper for hanging on a surface. The apparatus has a wallpaper storage and delivery area, a wallpaper length measuring system, a wetting chamber, a cutting bar, and a sealable relaxation chamber for maintaining the wallpaper in a wetted state to permit relaxation of the wallpaper before hanging.

Abstract: In a continuous vacuum vapor deposition system, a reduced-pressure chamber is partitioned into a plurality of sub-chambers by seal devices each formed by one set of three pinch rolls arrayed in parallel on one plane or a single seal roll, and a pair of seal bars positioned on the same plane on the respective sides of the pinch roll or seal roll. Gaps between the pinch rolls or seal roll and seal bars are adapted to allow the base plate portions on the inlet side and on the outlet side, respectively, to pass therethrough. In each of the reduced-pressure sub-chambers are disposed a pair of deflector rolls so that the base plate portions on the inlet side and on the outlet side may be wrapped respectively around the pinch rolls or seal roll with a wrapping angle of 10 degrees or more.

Abstract: A tape marking and cutting device which can be operated to apply marking on tape and to cut the marked tape to a desired length. The sequence is controlled by a microprocessor which devices a pulse motor which in turn drives a tape feed roller. The feed roller drives the tape in correspondence with the desired marking interval and a marking device is actuated. After each marking, the feed roller feeds the tape corresponding to the remaining length and the tape is cut. The sequence can be preset in a program.

Abstract: For the marking of gas-permeable fabric or cloth webs and other material webs, especially for the automatic marking in a marking station, the invention proposes to contact the fabric web within the marking station with a film including the pattern to be marked off in the form of perforations and acting as a stencil, and to suck atomized paint (paint mist) through the perforations and the contacting fabric web, wherein this atomized paint is an aerosol produced by atomization of a liquid containing a dye or pigment dissolved therein. Advantageously, a fluorescent dye is used to this end.

Abstract: A continuous tag printing apparatus is disclosed wherein a strip of tags is not wasted, and cut tags are easily aligned. The continuous tag printing apparatus has a feed mechanism for feeding the strip, a printing mechanism for printing desired information on the strip, and a mark applying mechanism for applying a mark on a side surface of a portion of the strip, which portion corresponds to a partition tag which indicates a change in printing contents.

Abstract: A system of applying glue or like liquid to a continuous web comprising a frame with a reservoir. A reservoir which is capable of being sealed tightly between uses in order to stop the drying process of glue, for example: a user of the apparatus may at any given time activate the use of the glue applicator by simply removing the cover of the reservoir, placing the dispensing reel bracket and the dispensing reel into its proper lace above the reservoir. A supply reel of unsaturated material has a wound web of the material attached, which is mounted generally above the reservoir in a rotational fashion. A guide roller module is disposed within the reservoir. The rollers outer perimeter is submerged within one quarter inch from the bottom of the reservoir. This enables the tape to be submerged to the extreme bottom of the glue reservoir and gives full usage of all liquid stored within the reservoir.

Abstract: A device for perforating or cutting a moving web of paper by means of pins, especially uniting paper for use in a cigarette filter attachment machine, comprises a roller carrying pins for perforating the paper in cooperation with a backing roller arranged to support the paper while it is being perforated, the backing roller being driven so that its peripheral speed equals that of the perforating roller, and having a deformable surface formed with indentations corresponding to the positions of the pins, the deformable material forming the surface of the backing roller being such that the indentations are formed by the pins when the rollers are first operated. The surface portion or portions of the backing roller aligned with the pins may comprise a thin metal portion in the form of a sleeve which covers recesses in the main body of the backing roller. The sleeve is perforated by the pins when the rollers first operate.