Clamping mandrel-engagement sensor combination, particularly for

Details Clamping mandrel-engagement sensor combination, particularly for Clamping mandrel-engagement sensor combination, particularly for

1992-10-13

1994-04-05

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 684, B65H 1804, B65H 6300

Patent

active

052997510

ABSTRACT:
To sense misalignment between a clamping mandrel (1, 2) of a web roll carrier and a web center sleeve or tube (5) into which the mandrel is to be inserted, the mandrel is formed with a sensing head (8, 10, 11, 14) which is spring-loaded and projects by a distance (a) beyond an end face (9) of the tip portion (3) of the mandrel. Upon engagement of the sensing head, for example due to misalignment, with the sleeve or end face of the roll, the sensing head can resiliently slide into the mandrel and, at the same time, by coupling to an electrical switch pin (19), cause engagement of the switch pin with terminal rings (18, 19) located in the mandrel body, to cause reversal of movement of the mandrel from a forward or inserting movement (F) to reverse or retract (R) the mandrel, thus effectively and simply eliminating damage to the sleeve or tube and/or the roll of web material, and/or the mandrel.

REFERENCES:
patent: 4358066 (1982-11-01), Deutschle et al.
patent: 4734549 (1988-03-01), Naoi et al.
patent: 4735374 (1988-04-01), Domel
patent: 4867389 (1989-09-01), Scheuter
patent: 5123604 (1992-06-01), Hammer et al.
patent: 5192033 (1993-03-01), Pipes
A. L. Riche, "Your Next Switch Selection Problem", pp. 1-6, Micro Switch Engineering, undated.

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