Apparatus for manufacturing a disc record package
AssigneeRCA Corporation
InventorJohn J. Prusak
Life of this patent
Estimating the term…
Abstract
Apparatus for the manufacture of a video disc caddy sleeve comprising folding platens, an intermediate spacer plate with indentations on the leading edge, and a selective heating means. Spacer plate causes plastic sheet to bend in the middle while folding platens close to a folded up position. Indentations on the leading edge act to keep label, already adhered to plastic sheet, from tearing while sheet is being bent into a U-shaped enclosure.
Claims4
Apparatus for fabricating a U-shaped enclosure from a flat plastic sheet comprising a narrow intermediate section interposed between a pair of panel portions;
- said flat plastic sheet having a wrap-around label attached to one side thereof;
- said apparatus including a pair of folding plates pivotally mounted to the apparatus housing for motion between a spreadout position where said folding plates are substantailly coplanar and a folded-up portion where said plates are juxtaposed to each other;
- said folded-up plates defining a space corresponding to the exterior surfaces of said U-shaped enclosure;
- said apparatus further having a substantially planar spacer plate being centrally mounted in said space defining said U-shaped enclosure;
- the exterior surfaces of said spacer plate defining the interior surfaces of said U-shaped enclosure;
- the terminating portion of said spacer plate having a leading edge subject to engagement with the narrow intermediate section of a flat plastic sheet laid on said spreadout folding plates with said label side thereof facing said folding plates;
- said apparatus including means for selectively heating said narrow intermediate section of said flat plastic sheet;
- said apparatus additionally having means for folding said plates to cause said flat plastic sheet to wrap around said spacer plate to form said U-shaped enclosure;
- wherein the improvement comprises providing a plurality of depressions in said leading edge of said spacer plate to cause the heated plastic near said intermediate section to flow inward so that said plastic sheet can be wrapped around said spacer plate without damaging said label.
Apparatus for fabricating a U-shaped enclosure from a flat plastic sheet comprising a narrow intermediate setion interposed between a pair of panel portions;
- said flat plastic sheet having a wrap-around label attached to one side thereof;
- said apparatus including a pair of folding plates pivotally mounted to the apparatus housing for motion between a spreadout position where said folding plates are substantially coplanar and a folded-up portion where said plates are juxtaposed to each other;
- said folded-up plates defining a space corresponding to the exterior surfaces of said U-shaped enclosure;
- said apparatus further having a substantially planar spacer plate being centrally mounted in said space defining said U-shaped enclosure;
- the exterior sufaces of said spacer plate defining the interior surfaces of said U-shaped enclosure;
- the terminating portion of said spacer plate having a leading edge subject to engagement with the narrow intermediate section of a flat plastic sheet laid on said spreadout folding plates with said label side thereof facing said folding plates;
- said apparatus including means for selectively heating said narrow intermediate section of said flat plastic sheet;
- said apparatus additionally having means for folding said plates to cause said flat plastic sheet to wrap around said spacer plate to form said U-shaped enclosure;
- wherein the improved terminating portion of said spacer plate comprises surfaces extending inwardly from the body portion of said spacer plate to said leading edge thereof to cause the heated plastic in the region of said intermediate section to flow inward to allow a labeled plastic sheet to wrap around said spacer plate without damaging said label.
Dependencies are inferred from the claim text.