Sheet-material associating – Associating and folding – Zigzag package
Patent
1991-04-18
1992-05-05
Look, Edward K.
Sheet-material associating
Associating and folding
Zigzag package
493357, 493410, 270 525, 225104, B41L 3902
Patent
active
051101017
ABSTRACT:
Successive panels of a running web with panels in zig-zag formation are deflected into a duct wherein the panels gather into a growing pile on a vertically movable bottom wall. A severing tool is moved across the pile at a selected level above the bottom wall to sever the web along the fold line between two neighboring panels when the pile beneath the level of the severing tool reaches a preselected height. A spreading device is used to spread apart the panels immediately above and below the level of the severing tool to establish a clearance for entry of the tool. The panels above and below the clearance are clamped to prevent the tool from displacing and/or otherwise affecting such panels during penetration into the clearance and during severing of the web along the fold line between the panels immediately adjacent the clearance.
REFERENCES:
patent: 4449349 (1984-05-01), Roth
patent: 4747591 (1988-05-01), Beyer
patent: 4750724 (1988-06-01), Herd
patent: 4778165 (1988-10-01), Buck
patent: 4842572 (1989-06-01), Roth
patent: 4842573 (1989-06-01), Peter
patent: 4871157 (1989-10-01), Hermann
patent: 4917365 (1990-04-01), Stemmler
Involvo AG
Kontler Peter K.
Look Edward K.
Newholm Therese M.
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