Bag-folding apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 5, 2000
Grant Date -
N/A
app pub date -
Dec 19, 1996
filing date -
Dec 19, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A folding apparatus of a bag-making machine includes a plurality of folding mechanisms each having a pair of nip rollers which receive a sheet or bag from an associated carrier structure, to thereby sequentially form transverse folds in each sheet or bag. In order to abate lamination-like adhesion of relatively thin, light gauge film materials to the belts and other surfaces of the folding apparatus, the belts and/or guide rollers of the apparatus are preferably provided with grooved sheet-contacting surfaces. The apparatus is additionally configured to abate wrinkling or buckling of a leading edge portion of each sheet or bag which can occur attendant to its reversal in direction of movement as it is directed between the nip rollers of each folding mechanism. High-speed operation is facilitated while avoiding improperly folded bags, or equipment jamming.
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