Pneumatic shafts, chucks and lifts for roll stock
AssigneeCedco, Inc.
InventorRussell C. Warczak
Life of this patent
Estimating the term…
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.
Claims29
In pneumatic, roll handling devices of the air shaft, chuck and roll lift types having a pneumatic bladder and means for expansibly contacting roll stock and cores, the improvement which comprises a limited expansion bladder member assembly disposed internally thereof to actuate said expansible contacting means.
A pneumatic, roll handling device of the air shaft, chuck and roll lift type comprising in operative combination:
- (a) a pneumatic bladder assembly;
- (b) an inner, expandable tubular sleeve contactable by said bladder and disposed exteriorly of said bladder;
- (c) an outer, expandable tubular sleeve, having an exterior surface for contacting roll stock and roll stock cores, disposed concentrically exteriorly of and in continuous contact with said inner sleeve;
- (d) said inner and outer sleeve each having a plurality of longitudinal slots therethrough, said slots commencing and ending medially of the ends of said tubular sleeves;
- (e) said slots in said sleeves are angularly displaced with respect to each other, and both sleeves have the same number of slots;
- and
- (f) means for inflating said bladder assembly.
An improved pneumatic mandrel comprising in operative combination:
- (a) a support shaft having journalling means at each end thereof;
- (b) a tubular bladder disposed concentrically around said shaft;
- (c) means to seal said tubular bladder at each end thereof to said shaft, said bladder being longitudinally shorter than said shaft.
- (d) means to supply a fluid to said bladder disposed in said shaft;
- (e) a first, tubular inner slotted sleeve disposed exteriorly of said tubular bladder;
- (f) a second tubular outer slotted sleeve disposed exteriorly and in contact with said inner sleeve;
- (g) each of said sleeve's slots commencing and terminating medial of the ends of said sleeves, and said slots in the outer sleeve are angularly displaced with respect to inner sleeve slots;
- and
- (h) said sleeves each are shorter than said shaft/journal means.
Dependencies are inferred from the claim text.