Application of Jurgeleit

194 F.2d 120, 39 C.C.P.A. 794
Court of Customs and Patent Appeals·Decided January 29, 1952·No. Patent Appeal 5823·Published·Cited by 2 cases

Opinion

GARRETT, Chief Judge.

' By this appeal appellant seeks reversal of the decision of the Board of Appeals of the United States Patent Office affirming the rejection by the Primary Examiner of all the claims, numbered respectively 4, 9, and 10, in appellant’s application, serial No. 717,230, for a patent “For Molding Apparatus.”

In the specification it is said: “One use to which my improved method and apparatus are particularly applicable is in the manufacture of vibration dampers. Such dampers are constructed with a central metal hub and outer concentric pulley or sleeve spaced from the hub, the space being filled with a ring of rubber, or the like, *121 which fastens the parts together. In this way ¡he outer pulley is cushioned on the inner hub by the rubber separating ring so that there is a tendency for the parts to absorb vibration.”

The pulleys which may be made on the apparatus defined in appellant’s specification and drawings apparently are designed for use in various kinds of mechanisms in which it is desired to modify vibration. 1

It is said, in substance, in appellant’s specification that, prior to his development, pulley vibration dampers were “manufactured by assembling the two concentric parts [hub and rim] on a conventional injection mold and then injecting rubber between the parts to join them together”; that his method of manufacture “required the parts [of the apparatus] to be made to extremely close manufacturing tolerances since they must fit tightly against the platen surfaces of the mold to permit injection of the rubber compound without the formation of excessive flash”; and that unless the parts were machined accurately to the same thickness they could not be assembled properly on the mold and might be displaced during the molding operation so that a defective product resulted.

The specification declares that appellant “overcomes the aforementioned difficulties by providing a molding apparatus so constructed and arranged as to accommodate parts of varying thicknesses so that they may be quickly and accurately assembled in position and the molding operation performed without excessive flash or displacement of the parts,” thus rendering it “unnecessary to machine the parts to close tolerances.” The claims read:

“4. Molding apparatus comprising, in combination, a support provided with guide means, a platen movable on said guide means, a plate carried by said platen and being movable relative to the platen, spring means biasing the plate for movement in one direction, a second platen moveably mounted on said guide means, a cylinder carried by said second platen and having an opening therein, said cylinder having a bearing surface cooperating with both the first mentioned platen and said plate for clamping work pieces therebetween against said surface in predetermined position, and a piston carried by said support and cooperating with said cylinder for forcing moldable material in said cylinder through said opening into a space between the work pieces.
“9. In molding apparatus a support, a platen moveable relative to said support for supporting a work piece, a member carried by said platen and being movable relative thereto for supporting a second work piece, a second platen movably mounted on said support, a cylinder for holding moldable material carried by said second platen and having an opening therein, said cylinder being provided with both a bearing surface co-operating with the first mentioned platen and said member for clamping the work pieces therebetween in alignment against said surface, a piston carried by said support cooperating with said cylinder to force moldable material through said opening into engagement with the work pieces, and means for moving the first and second platens toward the piston.
“10. In molding apparatus, a support provided with guide rods, a platen movable along said guide rods, a member carried by said platen and being movable relative thereto, spring means biasing the member for movement in one direction, a second platen movably mounted on said guide rods, a cylinder for holding moldable material supported on said second platen, said cylinder having an opening therein and a bearing surface cooperating with both the first mentioned platen and said member for clamping work pieces therebetween in alignment with said surface, a cross-bar fixed to said guide rods, a piston carried by said cross-bar for cooperation with said cylinder, and means for moving said first and second platen toward said piston so that the piston enters the cylinder to force moldable material in the cylinder through said opening into engagement with the work pieces.”

*122 As may be seen from the claims appellant’s apparatus embodies the combination of two platens, one carrying a separately movable plate, and the other, a cylinder, carried on an arm, with which cylinder a piston cooperates. The cylinder has a bearing surface that cooperates with both the first platen and the plate thereon by means of which the work pieces are clamped between the platen and the plate.

The' following patents were cited as references. Shaw, 1,919,534, July 25, 1933, Berry, 2,193,787, Mar. 19, 1940.

The apparatus described in the Shaw patent comprises a platen which carries one part of a two-part mold. The platen is vertically movable in the device so that there may be an adjustment of the two parts by which a mold cavity is formed. The second part is provided with a cylindrical portion, carried on an arm, the portion being for the moldable material. The cylindrical portion cooperates with a plunger to force thé material into the mold cavity through an opening at the bottom of the cylinder. A downward movement of the platen separates the mold parts, ejects the molded material from the first mentioned mold part by means of ejecting pins, and removes the excess material from the plunger by operating a knockout element.

The specification of the Berry patent recites:

“Many articles, such as dial faces for instruments, are provided with glass covers, usually slightly spherical, and are mounted in a surrounding frame or support. The machine of the present invention is designed to die-cast this frame or bezel of a plastic material such as cellulose acetate, one of the commercial varieties being ‘Tenite,’ and include in the casting the fragile insert so that upon the completion of the casting the frame or bezel will include the fragile insert permanently set in the bezel.
“Among the difficulties of this operation is the effecting of a closure for the mold cavity without breaking the fragile insert, and one of the purposes of the present invention is to accomplish this.”

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Application of Jurgeleit, 194 F.2d 120, 39 C.C.P.A. 794 (ccpa 1952).

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