Michael M Marx

US Patent:

44047509, Sep 20, 1983

Filed:

Mar 11, 1981

Appl. No.:

6/242637

Inventors:

Michael K. Marx - Pittsburgh PA
Louis P. Musante - Fairview PA

International Classification:

D03D 2900

US Classification:

33 1B

Abstract:

A needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations for receiving thread-like material such as yarn therethrough. The sheet has at least one flat face which has pattern indicia imprinted directly on the flat face so that one may needlepoint a design in accordance with the pattern indicia or in accordance with instructions utilized in combination with the pattern indicia. The pattern indicia may take on the form of a pattern needlepoint design on the flat surface of the needlepoint sheet or it may consist of indicia on the border of the flat face at spaced intervals to assist one in locating specific perforations in the sheet for sewing a needlepoint design thereon. The side walls of each of the perforations are preferably in the form of a pyramid frustrum.

US Patent:

43622909, Dec 7, 1982

Filed:

Jul 17, 1981

Appl. No.:

6/283908

Inventors:

Michael K. Marx - Pittsburgh PA
Louis P. Musante - Fairview PA

Assignee:

Westminster Marketing, Inc. - Pittsburgh PA

International Classification:

B27C 100
B29F 100

US Classification:

249 60

Abstract:

An injection mold for molding plastic needlepoint sheets which have a plurality of aligned rows of perforations which define plastic threads therebetween in a lattice configuration. The mold has engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement to define a mold cavity therebetween for the molding of a needlepoint sheet. The lattice channels in the mold body halves are constructed whereby the lattice channels in one half define a greater total volume than that of the other half, such that the greater volume of plastic to be molded in the mold cavity is received in the ejection half of the mold. In order to facilitate removal of the molded sheet from the mold, the lattice mold channels in the mold body halves are contoured to define a resultant cross section of the thread of a needlepoint sheet to be molded which is polygonal. In order to compensate for possible misalignment or offset of the mold halves during the molding operation, the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the mold channel openings of the respective mold halves.