US 5,226,611 A · Twin station rewinder

Abstract

A twin station rewinder having a transfer roll and a pair of rewinding rolls alternately rewinds a succession of paper logs at a pair of rewinding stations from a continuously advancing web of paper. The logs are wound on cores supplied to the each rewinding station which are thereafter held by diameter control rolls which move away from their respective winding roll to control web tension and log diameter during the log building process. Built logs are successively received in one of two log deceleration receivers and delivered to a log discharge position where they are dumped to a log discharge conveyor. New cores are supplied by a core supply conveyor to one of two core holders, each of which is associated with one of the log deceleration receivers. Cores are transferred from the core holders to the rewinding stations by a pair of core insertion arms which are retractable to permit the log building process.

Claims34

Dependent claims

A twin station rewinder for rewinding a web of paper into a plurality of logs comprising:

a) a transfer station comprising:
i) a single transfer roll for carrying a continuously travelling web,
ii) an upper portion of first and second winding rolls adjacent to and downstream of the transfer roll and alternately receiving the web from the transfer roll, and
iii) web severing means adjacent the transfer roll and upstream of the winding rolls for severing the web into segments in connection with a transfer from one winding roll to the other;
and
b) a pair of rewinding station means for rewinding the severed web segments comprising
i) a lower portion of the first and second winding rolls, and
ii) pivotable diameter control means located downstream of and associated with a respective one of the winding rolls, each diameter control means selectively pivotably positionable with respect to its respective winding roll for controlling the diameter of a log being built at that respective rewinding station.

5 more elements

A method of rewinding a web into logs alternately formed at a pair of winding stations, each associated with one of a pair of winding rolls, the method comprising:

a) passing the web around a portion of a transfer roll and one of two winding rolls;
b) engaging the web with a core held in contact with that winding roll by diameter control means at one of the pair of winding stations;
c) pivotably moving the diameter control means away from that winding roll as the web builds a log on the core while maintaining contact between that winding roll and the log by urging the log against the winding roll with the diameter control means at the one winding station;
d) severing the web transversely upstream of the winding rolls when the log is built to a desired diameter;
e) transferring the leading edge of the severed web to the other winding roll at the other of the pair of winding stations by selectively applying vacuum in the transfer roll prior to a nip between the transfer roll and the other winding roll;
f) repeating steps b)-e) with the other winding roll while
i) removing the log from contact with the one winding roll,
ii) subsequently inserting a new core against the one winding roll;
and
g) repeating steps a)-f) to successively alternatingly insert cores and build and remove logs at each of the pair of winding stations without stopping the web at the transfer roll.

7 more elements

Dependencies are inferred from the claim text.

Twin station rewinder

Life of this patent

Twin station rewinder

Life of this patent

Abstract

Claims34