Abstract: A process for the manufacture of gloves comprising: pre-coating a light-weight textile fabric substrate on one side only when a foamed dispersion consisting of a synthetic rubber and polyvinyl chloride; curing the dispersion; superposing two plies of the pre-coated fabric with their pre-coated surfaces in contact; welding together the two pieces of fabric along a welding zone in the shape of the outline of a hand; cutting out the shape thus defined using a shaped knife through the welding zone; turning the so-formed glove-shell inside out to bring the pre-coating to the outside; placing the inverted glove-shell onto a form in the shape of a hand; and dipping the form and the precoated outer surface of the glove shell mounted on the form into a liquid plastics material to provide an impervious outer coating, such outer coating being prevented from striking through into the fabric due to the pre-coating of the fabric.

Abstract: A machine for automatically applying stamps onto successive envelopes at a precise location and without distorting or marring the stamps or envelopes comprises vacuum devices for picking off the stamps and envelopes from respective magazines, feeding each envelope into an exact position below a backing pad, and concurrently feeding a respective stamp past a moistening device into an exact position below the envelope, then pressing the envelope against the backing pad and concurrently pressing the stamp upwardly against the envelope, and thereupon releasing the vacuum devices and knocking out the stamped envelope into a receptacle as the machine is returned to a start position for another application cycle.

Abstract: Thermoplastic materials, such as polyvinylchoride, cannot normally be heat bonded to certain higher-melting synthetic fabrics, such as nylon or the like, which are of the densely woven type and are also frequently treated with silicone or analogous substances to make them water repellant and/or windproof. The present method overcomes this problem by heat-bonding such materials under pressure and the application of a dielectric field, and by causing sufficient dielectric resistance to be present at the synthetic fabric so that the dielectric field is able to heat the synthetic fabric to a temperature at which it becomes sufficiently flowable to bond with the thermoplastic material.

Abstract: The apparatus serves to weld together the two parts of a slide frame which is made of plastics material and consists of a base part and a cover part, and to align the welded frames on carrying and centering rods. The apparatus comprises two feed wells, from which tracks extend to an ultrasonic welding horn, and downwardly flaring two centering wells, which succeed the ultrasonic welding horn and are provided each with a plunger disposed above the track.

Abstract: Tread plates on mutually opposed endless belts clamp and move a pack of boards horizontally lengthwise between electrodes for setting adhesive between the boards by dielectric heating. The tread plates are engaged by backing members spaced transversely of the length of the belt, and the tread plates are connected by a chain located between the backing members. The portions of the tread plates engageable with a surface of the board pack are of a suitable plastic to deter passage of radio-frequency energy from an electrode to an electrically-grounded portion of a tread plate or to the chain. Air bags are inflatable to press at least one endless belt against the board pack or to move such belt relative to supporting means away from the board pack. Adjusting means for prepressing rollers ahead of the endless tread belts on one side of the board pack and adjusting means for the endless tread belt on the same side of the board pack are interconnected for synchronized adjustment.

Abstract: The present invention concerns a method for the manufacture of laminated packing material containing at least one layer of a metal foil, e.g., aluminum foil, and a layer of plastic material applied to the said metal foil. The invention also concerns an apparatus for the realization of the method for the manufacture of laminated packing material.

Abstract: An ultrasonic welding and cutting apparatus designed for the manufacture of articles made of two superposed sheet materials includes an anvil means which exhibits a raised pattern of welding and cutting surfaces, and bearing surface means for limiting the motion of an ultrasonically vibrating horn toward the anvil means and for distributing also the impact forces manifest upon the anvil means. The horn is provided with means for reducing the motional excursion of the frontal surface portion which impacts upon the bearing surface means.

Abstract: This apparatus provides a means of sealing a plastic film cover over the open end of a plastic food container to render the container airtight and suitable for storage in a dispensing machine. The apparatus is self-contained and includes a base which carries a resiliently mounted support frame for the container, and a spindle-less dispensing frame for the film. A lever arm is pivotally mounted to the base rearwardly of the container support frame for swinging movement toward and away from the support frame. The lever carries a heat sealing head located forwardly of the pivot mounting for alignment with the container during heat sealing, and a cutter located rearwardly of the heat sealing head for clamping and severing the film adjacent the container support frame just prior to heat sealing. The heat sealing head includes a platen having peripheral margin portions registrable with the container flanges and grooved to provide improved heat sealing of the film to the container.

Abstract: Pressure-sensitive tape attached to and extending beyond the front edge of a stiff card is removed by grasping the extending end in jaws in a wind-up roller. Rotating the roller winds the tape thereon, facing outward. Upon completion of winding, the roller is stopped, the clamp jaws released, and the wrap of tape is thrust off the end of the cantilevered roller.

Abstract: Apparatus for manufacturing a wrapper web provided with a tear-open strip is disclosed. A web of wrapper material is fed along a generally planar guide path and two parallel incisions are made in the web to separate a narrow central strip of material therefrom. This narrow strip is raised out of the planar guide path, along which the two edge pieces on each side of the narrow strip continue to be fed. The two edge pieces are urged towards one another until mutually facing edges of the two edge pieces abut against one another below the centre of the narrow strip. The narrow strip is then guided back into the planar guide path so that it overlaps longitudinal edge portions of the two edge pieces, to which the narrow strip is adhesively or heat bonded to provide a web having a tear-off strip.The present invention relates to apparatus for manufacturing a wrapper web of viscose foil, or similar stickable or weldable wrapper material, provided with a tear-open strip.

Abstract: A tool for interconnecting by means of welding two webs of a plastics film enclosing a package of goods, said tool comprising two sections arranged to be pressed against one another while securely holding and welding together said film webs and thereafter separate said webs from one another after welding. The tool comprises means arranged to tighten the film around the goods while maintaining the stretch of film web extending from the welding point towards the web supply rolls in a tension-free condition during the welding operation proper so as to ensure a high-quality and durable welding seam.

Abstract: An automatic cover slipper for microscope slides has a base with guide means to mount a manually reciprocating slide having an advance position and a retracted position. The base has a pair of transverse apertures to receive a microscope slide and a stack of slide covers, respectively. A slide cover lifter assembly is mounted on the slide and includes a depending suction cup for manually gripping and lifting a slide cover when the slide is in advance position. A cement dispenser assembly with a reservoir is mounted on the slide and has a control valve for automatically dispensing a measured amount of cement onto the microscope slide when the reciprocating slide is in advance position. The lifter assembly on movement to retracted position is adapted to transfer the cover into registry with the microscope slide and for dropping the cover thereon in juxtaposition.

Abstract: An apparatus is disclosed for dispensing discrete lengths of a double-coated adhesive tape onto a substrate. The device has a housing with one open side. An applicating drum with a plurality of flat applicating surfaces disposed about its circumference is rotatably mounted inside the housing near one end. A roll of double-coated adhesive tape is supported in the housing, the tape being pulled off the supply roll as the drum rotates. A base is attached to the housing extending along the open side of said housing and has an opening through which an applicating surface can pass. Means rotate the applicating drum upon movement of the housing toward and away from the base to bring an applicating surface bearing double-coated tape into an applicating position where the cutting means sever a short length of the double-coated tape and transfers the tape to a substrate.

Abstract: A method of making an identification card which comprises making any required characters, designs and/or embossings on the base material of the card, further providing a colored layer on the bass material of the card and then engraving the colored layer and base to varying depths in the form of fine lines and and points so that, by regulating the ratio of the surface areas of the engraved part and unengraved part, the differences in the color thickness and luster may be expressed to form an engraved image by which the user can be identified and which image has no projections thereon.