Air bags
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United States of America Patent
Stats
-
Jul 6, 2004
Grant Date -
Nov 7, 2002
app pub date -
Mar 28, 2002
filing date -
Mar 30, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tube of film (12) is pierced by an injection needle (18) that fills the tube with air as the film and needle move. Two spaced heat seal wires (22) seal longitudinal extents of the tube from each other. A piston shaft (100) is constrained to move with a carriage (56) to compress and expel air from a cylinder, which air is supplied to the space within the tubular bag. An air paddle (92) pushes on the outer side of the bags to cause air that has recently been injected to be urged forwardly, within the bag, and through the space between an anvil (23) and the sealing wires (22) into the bag that is formed moments later by heat sealing.
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