Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-12-05
1991-09-24
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
226 36, 226119, B65H 1918, B65H 23188, B65H 2316
Patent
active
050508121
ABSTRACT:
An envelope machine which makes two envelopes at once. One web is used up to a relatively advanced point in the envelope forming process to simultaneously form two envelopes. At a terminal portion of the envelope processing, the web is cut lengthwise to form two envelopes. The device also includes improved structure for maintaining uniform the tension on the web. This need for uniform tension is made more prevalent by the thickness of the web which must be used to form two envelopes in parallel. The structure of the present invention which maintains uniform the thickness of the web is formed herein by a dancer roll which moves in a longitudinal fashion in cooperation with movement of other associated rolls. Whenever the dancer roll reaches one of its stopping points, it sets off a limit switch which operates a piston to change the type of moving being applied to the dancer rolls. A dual paper roll system is also used so that when one of the paper rolls is used as the primary roll, the other paper roll is put into place as a backup roll.
REFERENCES:
patent: 2314070 (1943-03-01), Bogoslowsky
patent: 2491228 (1949-12-01), Swift
patent: 3371834 (1968-03-01), Willits et al.
patent: 3794231 (1974-02-01), Martin
patent: 3836089 (1974-09-01), Riemersma
patent: 3841545 (1974-10-01), Gingher, Jr.
patent: 4856692 (1989-08-01), Harper
Jillions John M.
Sterling Envelope Corporation
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