Advancing material of indeterminate length – Threading device – With means to pull lead-end
Patent
1995-04-24
1998-01-20
Stodola, Daniel P.
Advancing material of indeterminate length
Threading device
With means to pull lead-end
226 95, 2425274, 2425327, B65H 2020, B65H 3504, B65H 1928
Patent
active
057093300
ABSTRACT:
Apparatus for cutting and moving a leading end of a web, including a frame (70, 186); a crank (188) mounted for rotation on the frame; an upper platen (210); a pair of linear guides (212) for the upper platen; a first crank arm (196) connected between the upper platen and the crank; a lower platen; second and third crank arms (218, 220) connected between the lower platen and the crank; an upper die shoe (262) mounted to the upper platen; a lower die shoe (260) mounted to the lower platen; a pair of linear guides (264) between the die shoes; a slide (96) mounted on the frame; a shuttle arm (98) mounted on the slide for movement between the die shoes; an actuator arm (114) pivotably connected to the shuttle arm; a vacuum head (88) pivotably mounted to the shuttle arm; a cam follower (144, 146) connected to pivot the vacuum head; a cam (148, 158) pivotably mounted to the frame for engaging the cam follower; a link (258) rigidly connected to the cam; a fourth crank arm (252) pivotably connected between the link and the crank; and a drive system (287-304) for rotating the crank and oscillating the drive arm. The shuttle arm is moved back and forth on the slide by the actuator arm and the vacuum head is pivoted by the first link to grip the web as the upper and lower die shoes move toward each other to cut the web, in synchronism with movement of the upper and lower die shoes.
REFERENCES:
patent: 3443769 (1969-05-01), Breacker et al.
patent: 3505918 (1970-04-01), Schneider
patent: 5125630 (1992-06-01), Hoyt et al.
patent: 5215273 (1993-06-01), Greene
patent: 5249373 (1993-10-01), Rogne et al.
patent: 5301892 (1994-04-01), Merz et al.
Sisson Thomas Allen
Watkins Joseph Albert
Bailey, Sr. Clyde E.
Eastman Kodak Company
Kaness Matthew A.
Snee, III Charles E.
Stodola Daniel P.
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