Greenhouse film folding apparatus

Details Greenhouse film folding apparatus Greenhouse film folding apparatus

1983-12-02

1988-08-16

Jones, D. B.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493439, 493438, B31B 136

Patent

active

047641614

ABSTRACT:
An apparatus for folding large sheets of thermoplastic film in a U-shaped fold comprising a trapezoidal former or frame which tapers from a relatively wide width to a substantially narrower width about one-half the width of the relatively wide width and which extends downwardly across a flat plane about the width of the narrower width, a tucker bar or V-shaped member mounted on the trapezoidal former for receiving and inwardly folding the edges of the film to be folded, and a top plane mounted on the trapezoidal former just above and substantially parallel to the tucker bar for receiving and guiding the unfolded portion of the plastic film thereover. Means for receiving the sheet of plastic film and guiding the film over the trapezoidal former and a means for receiving the plastic film after it has been folded are also provided. Adjustment means are further provided for raising and lowering the tucker bar.

REFERENCES:
patent: 1838704 (1931-12-01), Potdevin
patent: 2125306 (1938-08-01), Novick
patent: 2320326 (1943-05-01), Avery
patent: 2428837 (1947-10-01), Denton
patent: 2532784 (1950-12-01), Reitzes

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