Web advancement sensing methods and apparatus

Details Web advancement sensing methods and apparatus Web advancement sensing methods and apparatus

1981-09-16

1984-06-26

Levy, Stuart S.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 673R, 242 7543, 242 7544, 242184, 242189, 226 24, 226 44, B65H 2818, B65H 1726, B65H 2504

Patent

active

044561938

ABSTRACT:
Methods and apparatus for sensing advancement of a web from a web supply remove the web from the supply in successive distinct and constant increments. Each constant increment is sensed upon its removal from the supply. Advancement of the web is then determined from the sensed constant increments. The requisite constant increments may be provided by advancing web from the supply and selectively arresting the supply to limit the advanced web to the constant increment for each advance.

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