Pneumatic shafts, chucks and lifts for roll stock

Details Pneumatic shafts, chucks and lifts for roll stock Pneumatic shafts, chucks and lifts for roll stock

1977-07-14

1979-01-23

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

29113R, B65H 7524, B21B 3132

Patent

active

041356772

ABSTRACT:
Improved pneumatic shafts, chucks and lifts for roll stock and methods of construction and operation comprising an air bladder housed within a pair of concentrically disposed, longitudinally slotted sleeves. Upon inflation of the bladder, the outer sleeve expands against the roll stock, or the core supporting the roll stock, providing full length grip. The inner sleeve expands against the outer sleeve while protecting the bladder from being pinched. The bladder is preferably a vinyl polymer plastic containing substantially inelastic roving to provide controlled and limited expansion. The combination permits true centering of rolls for rotational balance and constant tension, true running.

REFERENCES:
patent: 2331743 (1943-10-01), Sullivan
patent: 2711863 (1955-06-01), Grettve
patent: 3104074 (1963-09-01), Karr
patent: 3253323 (1966-05-01), Saueressig
patent: 3863857 (1975-02-01), Smith
patent: 3904144 (1975-09-01), Gattrugeri

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