Web cutting machine, particularly for severing printed paper web

Details Web cutting machine, particularly for severing printed paper web Web cutting machine, particularly for severing printed paper web

1990-05-24

1991-08-06

Watts, Douglas D.

Cutting

With means to convey work relative to tool station

Cut made parallel to direction of and during work movement

83 98, 83402, B65H 3508

Patent

active

050367374

ABSTRACT:
To direct the leading edge of a cut web element, cut by knives (3) on a cutter cylinder pair (1, 2), to an inlet region of transport belts (6, 7) running over deflection rollers (8, 9), air jet nozzles (10, 11) direct an air cushion or air pillow into the nip between the cylinders (1, 2). The cylinders are formed with a plurality of circumferential grooves (18, 19) or a spiral groove (21), so that the air can pass along the nip and continue to guide the cut leading edge of the web. Suction nozzles 22, 23 enhance the air cushion effect applied to both sides of the web. If the web is a multi-ply structure, the air cushion or air pillow additionally contributes to adhesion of the various plies against each other.

REFERENCES:
patent: 1643120 (1927-09-01), Hoener
patent: 3143016 (1964-08-01), Obenshain
patent: 3322037 (1967-05-01), Cavagnero
patent: 3405855 (1968-10-01), Daly et al.
patent: 3405884 (1968-10-01), Patterson, Jr.
patent: 3875836 (1975-04-01), Hutchinson et al.
patent: 3976237 (1976-08-01), Bossons
patent: 4385537 (1983-05-01), Wolf
patent: 4771666 (1988-09-01), Ikeuchi et al.
"Lithoman M", p. 6.

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