Bag forming/filling system
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United States of America Patent
Stats
-
Jun 7, 1994
Grant Date -
N/A
app pub date -
Mar 16, 1992
filing date -
Jul 30, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bag forming/filling system includes a delivery mechanism to feed a predetermined length of web material from a web roll to a bag forming cylinder, in which the web is sealed by a sealing machine to form a bag. A predelivery mechanism unwinds and loosens a portion of the web from the web roll by a length substantially corresponding to the predetermined length before operation of the delivery mechanism. The predelivery mechanism may include a pivotally movable tension lever, which moves in an unwinding direction substantially during the closing motion of the sealing machine. In a second embodiment, the predelivery mechanism includes a drive element for rotating the web roll and a detector for detecting a slackened length of a portion of the web.
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