Process for tempering plastic films to be bonded and device for bonding plastic films with temperature controlled transport roll
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United States of America Patent
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N/A
Issued Date -
Jul 4, 2002
app pub date -
Dec 12, 2001
filing date -
Dec 12, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Process for setting the temperature of plastic film, which is to be bonded and which exists preferably in the form of slips (8), on collapsed tubular pieces or workpieces (2) made of plastic film, for example valve slips on the raised bottom squares, or bottom cover sheets on the assembled bottoms of block bottom valve sacks, whereby the tubular pieces or the workpieces are conveyed by means of a conveyor with a plate or a table (1) and fed into a slit between a counterpressure element, preferably a counterpressure roll (4) and a suction cylinder (6), and whereby the plastic film to be bonded is fed and transferred by a conveying cylinder (7) to the suction cylinder (6), whereby the plastic film to be bonded is already heated in the roll slit during transport. Furthermore, a device is presented for carrying out the process that exhibits a heatable conveying roll.
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