Multiple fixed-position film centerwinder and method for winding web material
OwnerMichael C. Perrigo, Jei Luhinventors
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Abstract
The invention is a centerwinder for receiving and winding web material sequentially on one of at least two fixed shafts. The two or more shafts are desirably positioned vertically to one another in a stationary structure and eliminate the need for a powered turret assembly. A lay-on roll assembly can be used that pivots in and out as well as up and down for serving the respective shaft locations. A cylinder linkage provides the same or constant force against the winding roll on either the upper or the lower shaft. Transfer rolls in desirable embodiments are automatically pivoted into the proper position for a fully automatic transfer or to assist the operator during a manual cut and transfer.
Claims14
A centerwinder for receiving and winding a web material comprising:
- a source for a constant feed of said web material;
- at least two winding shafts, said at least two winding shafts are positioned approximately parallel to one another and independently rotate in a stationary structure;
- and
- a lay-on arm assembly, said web material passes through said lay-on arm assembly and is wound on one of said winding shafts to a predetermined quantity, said lay-on arm assembly:
- (i) cuts said web material upon obtaining said predetermined quantity of said web material on said winding shaft;
- and
- (ii) transfers said constant feed of said web material to another of said winding shafts.
A centerwinder for receiving and winding a web material comprising:
- a source for a constant feed of said web material;
- a first winding shaft and a second winding shaft, said first winding shaft and said second winding shaft are positioned approximately parallel to one another and independently rotate in a stationary structure;
- a lay-on arm assembly, said web material passes through said lay-on arm assembly and is wound into a roll on said first winding shaft to a predetermined quantity, said lay-on arm assembly:
- (i) maintains a constant pressure of a lay-on roll against said roll of said web material as said web material is wound onto said winding shaft;
- (ii) cuts said web material upon obtaining said predetermined quantity of said web material on said first winding shaft;
- and
- (iii) transfers said constant feed of said web material to said second winding shaft.
A method for continuously winding a constantly fed web material comprising the steps of:
- feeding said web material through a lay-on arm assembly to at least one rotating winding shaft;
- maintaining a constant pressure of a lay-on roll of said lay-on arm assembly against a roll of said web material as said web material is wound onto said winding shaft;
- sensing a predetermined quantity of said web material on said winding shaft;
- cutting said web material upon obtaining said predetermined quantity of said web material on said winding shaft;
- and
- transferring said cut constant feed of said web material by a transfer roll mechanism of said lay-on arm assembly to another of said winding shafts.
Dependencies are inferred from the claim text.