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US 4,050,875 AGranted
Arts and crafts molding device
AssigneeMarvin Glass & Associates
InventorsAllison W. Katzman, Albert G. Keller
Life of this patent
Estimating the term…
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AssigneeMarvin Glass & Associates
InventorsAllison W. Katzman, Albert G. Keller
Estimating the term…
A device and method for use in the art or craft of molding hollow artistic objects from thermoplastic molding material, such as wax. The molding device includes a frame with a vertical stationary, circular gear rack secured thereto. A crank driven shaft is journaled through the frame in a position concentric with the rack. A yoke-like mold carrier is secured to the end of the shaft for rotation therewith. A mold holder is, in turn, mounted on the mold carrier for rotation about an axis generally perpendicular to the crank shaft axis between the yoke arms of the mold carrier. The mold holder has a shaft projecting through one of the yoke arms of the mold carrier and is secured to and driven with a disc gear, which is enmeshed with the gear rack. As the crank is turned to rotate the mold carrier, the disc gear rides on the gear rack and rotates the mold holder. In operation, a mold in the form of a pair of mating mold halves providing a mold cavity is supplied with molten thermoplastic material, assembled, and mounted on the mold holder. Turning of the crank causes the mold to be rotated on the two generally perpendicular axes and generally evenly distributes the thermoplastic material on the interior of the mold cavity surface as it cools and sets.
An arts and crafts device for molding hollow objects or the like from molten thermoplastic material to provide a hollow molded end product, which device comprises a frame having a base portion and a vertical carriage support, a carriage mounted on said carriage support for rotation about a first axis, a crank having a drive shaft mounted on said frame for rotation relative thereto and secured to said carriage for rotating said carriage, said carriage being in the form of a yoke having two opposing arms, a mold receiver including two generally planar sheets for holding a split mold, each half of said mold being secured to one of said sheets, means including a second frame and a second shaft mounting said mold receiver to and between said yoke arms for rotation relative thereto about a second axis generally perpendicular to said first axis, a crown gear on said frame concentric with said first axis, and a second gear mounted on said second shaft and enmeshed with said crown gear for tracking said crown gear while said carriage is rotated by said crank, thereby also rotating said mold on said second, perpendicular axis.
An arts and crafts device for molding hollow objects from molten wax to provide a hollow molded end product, comprising:
Dependencies are inferred from the claim text.