Cutting – Tool engages work during dwell of intermittent workfeed – Dwell caused by clamping or blocking work during continuous...
Patent
1977-10-14
1979-05-01
Meister, J. M.
Cutting
Tool engages work during dwell of intermittent workfeed
Dwell caused by clamping or blocking work during continuous...
83208, 83221, 83650, 226110, B26D 524
Patent
active
041517709
ABSTRACT:
Two webs of different widths of microfoam are fed from web rolls by a continuously driven roller and a pinch roller through a heated-wire cutting station. At the cutting station, a single cutting wire extends across the path of both webs; a single set of clamping plates is also provided. The feed of the webs may be alternately interrupted by a clamping device which includes a pivotal clamp support that can be swung in a rocking motion back and forth about its pivot axis. A pair of U-shaped channels located on either side of the support pivot axis extend across the width of both webs and can be swung respectively toward and away from the webs. Removable clamping segments are fitted into a portion of each U-shaped channel to define adjustable length clamping elements which extend across the widths of respective webs for accommodating various sizes of webs. By swinging the clamp support between two positions, the clamping device alternately clamps one or the other web against a fixed clamp bar. To drive either web, the pinch roller is moved toward the driven roller and stopped when the rollers are at a predetermined minimum spacing less than the thickness of the webs. The frictional force of the driven roller on the web is sufficient to pull the unclamped web but not to tear the clamped web.
REFERENCES:
patent: 3300113 (1967-01-01), Lane
patent: 3924497 (1975-12-01), D'Angelo
D'Angelo Joseph J.
Maccherone Lawrence S.
Flexible Design Packaging Machine Company
Meister J. M.
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