Shaft having means for retaining thereon a reel, material roll o

Details Shaft having means for retaining thereon a reel, material roll o Shaft having means for retaining thereon a reel, material roll o

1981-12-08

1983-12-27

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

B65H 7524

Patent

active

044225911

ABSTRACT:
A number of elongated pressure members are located in recesses in the shaft, to be displaced axially and radially outwards by means of pressurized fluid until they engage against the inside of the reel. Within the pressure members an actuating sleeve is mounted for reciprocating movement between extreme end positions, and having wedge surfaces cooperating with wedge surfaces formed on the pressure members. Two spaces are defined in the shaft communicating with each other through a relatively narrow channel and closed by a first valve member in one position. The first space communicates directly with the source of pressurized fluid. The second space is bounded by a surface of the actuating sleeve and is provided with a second normally closed valve member. The first valve member is so coupled to the pressure members that when they are moved to one end position the first valve member is opened, so that the pressurized fluid is permitted to flow into the second space through the channel and the actuating sleeve is urged to the other end position. By opening the second valve member the fluid pressure in the second space is relieved and the actuating sleeve is urged to the one end position again.

REFERENCES:
patent: 2556149 (1951-05-01), Talbot
patent: 2733874 (1956-02-01), Petersen et al.
patent: 3722808 (1973-03-01), Brown
patent: 4147312 (1979-04-01), Secor

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