Planet Products Corporation

Other

Carl P Griesdorn

George J Wile

A method and apparatus for simultaneously folding the edges of a sheet of material, particularly the rigid plastic sheets of material having concave sections therein which are used as covers in 'blister' packages. It utilizes a die having walls on the sides and a shelf inside the walls, a compressible layer which rests on top of the shelf over which the sheet of material is placed, and a heating plate which presses down on the sheet of material causing the edges of the sheet to become pliable and to bend upward against the walls of the die, and then folding the upright edges over a plate.

Method and apparatus for folding the edges of a sheet of material

An improved sheet forming machine and method of making same are provided wherein such machine employs a first set of clamp assemblies and associated moving devices for serially moving the sheet or sheet material along fixed parallel rails through a succession of working stations and a second set of clamp assemblies which cooperate with the first set of clamp assemblies in a non-interfering manner and grasp and hold opposite side edge portions of the sheet material the full extent of the stations along the rails, and the second set of clamp assemblies are adapted to provide precise grasping and holding of such opposite side edge portions of the sheet material along such full extent to enable modification of the sheet material at each successive station with optimum precision. The machine also has improved apparatus for adjusting and holding the distance between the parallel rails.

Sheet forming machine

An apparatus for packaging articles of roughly equal size in package means therefor and method of making such apparatus are provided wherein such apparatus comprises a first conveyor device for the articles with the first conveyor device having a plurality of receptacles each for receiving and supporting an individual one of the articles, a second conveyor device for moving a plurality of packages for the articles, and a transfer device for transferring a predetermined number of the articles from the first conveyor device into associated packages therefor wherein the first and second conveyor devices have portions thereof in parallel facing relation and the apparatus further comprises a drive for operating the conveyor devices in a continuous non-indexing manner to thereby continuously package the predetermined number of articles in an associated package. In accordance with another feature of this invention the apparatus comprises an improved transfer device in the form of a rotatable star wheel and cooperating stationary fingers with the star wheel having a plurality of radial arms which are adapted to extend through selected fingers and cooperate therewith to transfer articles.

Apparatus for packaging articles and method of making such apparatus

Apparatus is disclosed for the production of silk screened textile goods. Workpieces are positioned on pedestals of a conveyor at a printing station and a silk screen design is then printed thereon. Cyclical operation of the conveyor incrementally advances the printed workpieces to a 'drying' station where the printed designs is converted to solid form. The ink employed is plastisol based and is converted or 'dried' to solid form primarily through polymerization. The 'drying' station employs a heater element which selectively emits infra-red radiation spectrally limited to a wavelength range of three to four microns, a wavelength range at which the liquid plastisol exhibits a peak of radiation absorption. Operation of the conveyor is responsive to the rate at which an operator silk screens the workpieces with means being provided to retract the heater element from its operative position if this rate falls below a predetermined pace in order to avoid over exposure of the workpiece to the infra-red radiation. The plastisol inks are 'dried' in significantly reduced times with the energy requirements being greatly minimized. Similar advantages can be attained in 'drying' other polymerizable liquids by employing infra-red radiation which is spectrally limited to a wavelength range at which the liquid exhibits a peak of radiation absorption.

Silk screen printing with the curing of polymerizable liquids

A heat transfer apparatus includes a dome type enclosure member with a heating element internally mounted within a dome formed within the member. The diaphragm cooperatively forms a variable volume chamber with the enclosure member and is movable toward the heating element under the impetus of atmospheric air as air is evacuated from chamber.

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Cincinnati, OH, United States of America

Carl P Griesdorn