Work holders – Plural holders to hold workpieces relative to each other – Workpieces parallel to each other
Patent
1975-02-24
1976-04-27
Smith, Al Lawrence
Work holders
Plural holders to hold workpieces relative to each other
Workpieces parallel to each other
249 91, 269254R, 269321W, B22D 500, B25B 514
Patent
active
039530140
ABSTRACT:
A rack for holding the sides of a flat-sided plastic napkin holder vertical while the bottom of the holder is being molded. The rack includes a wire basket of generally box-like shape with vertical sides and a bottom formed from segments of stiff wire. In addition to the wire basket, the rack includes a rectangular sheet of relatively stiff, resilient polyethylene which is held fast at the middle by the bottom of the basket frame so that the halves of the sheet extend upwardly and press outwardly against two of the basket sides to give it a U-shaped profile in side view. The wire basket has three short legs to support it firmly on the rim of a mold for casting the bottom of the napkin holder. To use the device, preformed sides of the plastic napkin holder are forced between the two halves of the polyethylene sheet and confronting sides of the wire basket so that the pressing halves of the sheet hold the napkin holder sides in position against the basket without slippage. The rack with the napkin holder sides thus positioned is placed on top of the casting mold for the bottom of the napkin holder and the napkin holder sides are then pushed downwardly into the mold cavity, where they are held upright, in precisely coplanar relationship, until the bottom of the napkin holder is cast.
REFERENCES:
patent: 352476 (1886-11-01), Lustig
patent: 728450 (1903-05-01), Everett
patent: 3201874 (1965-08-01), Christy
patent: 3610613 (1951-10-01), Worden
patent: 3690614 (1972-09-01), Cherniak
Crowe John H.
Smith Al Lawrence
Watson Robert C.
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