Web slitting system and slack inducing apparatus and method useful therein
AssigneePrintpack, Inc.
InventorJack Peugh
Life of this patent
Estimating the term…
Abstract
Apparatus for inducing a controlled quantity of slack in a web traveling along a travel path from a web supply roll to a web slitter comprises first and second supports movable relative to one another. First and second sets of rollers are secured to the first and second supports, respectively, the rollers together defining at least a portion of a travel path for the web from a web supply roll to a web slitter. A control, responsive to an external signal, moves the first and second supports relative to one another a predetermined distance under positive control in such a manner as to effect relative movement of the first and second sets of rollers to vary the length of the travel path.
Claims22
Apparatus for inducing a controlled quantity of slack in a web travelling along a travel path from a web supply roll to a web slitter, comprising:
- (A) first and second support means movable relative to one another;
- (B) first and second sets of rollers secured to said first and second support means, respectively, said first set of rollers remaining at all times to one side of said second set of rollers, said rollers together defining at least a portion of a travel path for the web from a web supply roll to a seb slitter;
- and
- (C) control means responsive to an external signal for moving each of said first and second support means relative to one another a predetermined distance under positive control in such a manner as to effect relative movement of said first and second sets of rollers, thereby to vary the length of said travel path and induce slack by shortening the length thereof.
A process for inducing a controlled quantity of slack in a web traveling along a travel path from a web supply roll to a web slitter comprising the steps of:
- (A) threading the web through first and second sets of rollers so that the rollers together define at least a portion of the travel path of the web from the web supply roll to the web slitter;
- and
- (B) in response to an external control signal, moving each of the first and second sets of rollers relative to one another under positive control a predetermined distance to vary the length of the travel path and induce slack by shortening the length thereof, said first set of rollers remaining at all times to one side of said second set of rollers.
A web slitting system comprising:
- (A) means for rotatably supporting a supply roll of web to be unwound and slit;
- (B) means for supporting and rotatively driving take-up rolls for rewinding the web after unwinding and slitting;
- (C) means for slitting the unwound web disposed adjacent said take-up roll support means;
- and
- (D) means defining a portion of a travel path for the web from said supply roll support means to said slitting means, including means for varying the length of said travel path portion a predetermined distance and thereby induce a controlled quantity of slack in the web;
- said means for varying the length of said travel path portion comprising:
- (i) first and second support means movable relative to one another;
- (ii) first and second sets of rollers secured to said first and second support means, respectively, said first set of rollers remaining at all times to one side of said second set of rollers;
- and
- (iii) control means responsive to an external signal for moving each of said first and second support means relative to one another a predetermined distance under positive control in such a manner as to effect relative movement of said first and second sets of rollers to vary the length of said travel path portion.
Apparatus for inducing a controlled quantity of slack in a web travelling along a travel path from a web supply roll to a web slitter, comprising:
- (A) first and second support means movable relative to one another;
- (B) first and second sets of rollers secured to said first and second support means, respectively, said rollers together defining at least a portion of a travel path for the web from a web supply roll to a web slitter;
- and
- (C) control means responsive to an external signal for moving each of said first and second support means relative to one another a predetermined distance under positive control in such a manner as to effect relative movement of said first and second sets of rollers, thereby to vary the length of said travel path.
Dependencies are inferred from the claim text.