Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1988-03-14
1989-08-15
Rosenbaum, Mark
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29448, B23P 1100
Patent
active
048561711
ABSTRACT:
A method of applying a fabric material, such as a screening fabric or fiber glass cloth in a retention groove of a rectangular frame by applying a spline cord in the groove with a fabric portion disposed therein. The method comprises storing data pertaining to the dimension of a rectangular frame, in an electronic control device. A frame support structure is automatically positioned to a frame receiving position where the frame is placed thereon. At least two frame engaging members of the frame support structure are moved to position the side members of the frame in a desired configuration. The side members are gripped to maintain them along respective straight transverse axis. A predetermined length of fabric material is then positioned to the frame to overly the retention groove of the side members. A spline cord positioner is displaced to a predetermined position on one of the side members of the frame and a spline cord is disposed in the groove by displacing the positioner along the entire length of the groove in the side member while forcing the spline cord in the groove over a portion of fabric. The fabric is trimmed simultaneously adjacent the spline cord. After the spine cord has been applyied in the circumferential groove of a frame, the cord is cut and the fabric is also cut to disconnect it from a supply of fabric. Thereafter the assembled frame is disconnected from the frame support structure.
REFERENCES:
patent: 2695445 (1954-11-01), Johnsen et al.
patent: 2753897 (1956-07-01), Conrad
patent: 2804101 (1957-08-01), Johnson et al.
patent: 3851684 (1974-12-01), Wyrich
Chin Frances
Les Produits Duvernay Ltee
Rosenbaum Mark
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