Package making – Progressively seamed cover web or web folds – With closing of web between package units
Patent
1986-07-17
1987-09-15
Culver, Horace M.
Package making
Progressively seamed cover web or web folds
With closing of web between package units
53373, 53379, 1565833, B65B 5126, B65B 5130, B65B 5114
Patent
active
046930582
ABSTRACT:
A sealing bar for heat sealing a length of heat-sealable material, such as tubing, to form packages and the like. The sealing bar has a surface adapted for pressure engagement with the heat-sealable material for flattening it and heating it. A slot extends substantially through the bar substantially parallel to and adjacent the surface of the bar, thereby defining the portion of the bar between the slot and the surface as a relatively thin resiliently flexible bridge. The bridge is engageable with a portion of the flattened heat-sealable material, such as a portion of tubing having a longitudinal seam or a gusset, thicker than other portions of the heat-sealable material and the bridge is adapted resiliently to yield on engagement with the thicker portion of the material.
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Culver Horace M.
Hayssen Manufacturing Company
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