US4007865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web guiding and centering apparatus
Assignee: Cape Colony Manufacturing Inc
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Filing: 1975-08-27
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Granted: 1977-02-15
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Expires: 1995-08-27
Abstract
Abstract A web guiding and centering apparatus for guiding and centering a moving web of substantially constant width relative to a fixed center line includes two guiding devices positioned equally distant from the selected center line, each guiding device comprising a pair of co-acting guide rolls inclined in the direction of travel of the moving web for engaging an edge portion of the web on opposite faces thereof. One guide roll of each pair is pivotally and resiliently biased toward the other roll of the same pair about a pivot which is outboard of the web. At least one roll of each pair has a composite surface which includes an outboard surface portion of relatively hard, low coefficient of friction material and an inboard surface portion of a relatively soft, high coefficient of friction material. The inclined relationship of the co-acting rolls of each pair relative to the direction of travel of the web, the biased, pivotal relationship of the co-acting rolls relative to each other, and the difference in relative hardness and coefficient of friction of the inboard and outboard surface portions of at least one roll of each pair of rolls result in cyclical action between the rolls and web which causes the opposite edges of the web to be guided substantially uniformly with respect to a selected fixed center line. A modification of each guiding device includes a recessed area, or alternatively a bump on one roll face for augmenting the response of the guide rolls.
Inventors
- 👤 Nelson B. Crandall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:50
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/02; B65H23/032; B65H23/038; B65H2701/00; B65H2701/10; B65H2701/13; B65H2701/132
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
161 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls in engagement with the edge of a moving web at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane normal to the web and common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction.
Claim 2
Dependent Claim
161 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls in engagement with the edge of a moving web at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane normal to the web and common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction.
Claim 3
Dependent Claim
30 words
The device of claim 1 wherein said inboard roll portion is made of an elastomeric rubber-like material, and said outboard roll portion is made of a hard fluorocarbon synthetic resin.
Claim 4
Dependent Claim
18 words
The device of claim 1 wherein both of said rolls have said cylindrical inboard and outboard roll portions.
Claim 5
Dependent Claim
37 words
The device of claim 1 wherein only one of said rolls has said cylindrical inboard and outboard roll portions and the other of said rolls has a single cylindrical surface of the same material throughout its length.
Claim 6
Dependent Claim
163 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, means for mounting said pair of co-acting rolls in engagement with the edge of a moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, at least one of said rolls including surface means for causing a cyclical bounce of one roll relative to the other during each revolution of said rolls.
Claim 7
Dependent Claim
163 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, means for mounting said pair of co-acting rolls in engagement with the edge of a moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, at least one of said rolls including surface means for causing a cyclical bounce of one roll relative to the other during each revolution of said rolls.
Claim 8
Dependent Claim
31 words
The device according to claim 5 wherein said surface means for causing a cyclical bounce comprises an elongated recess extending longitudinally along the surface of at least one of said rolls.
Claim 9
Dependent Claim
31 words
The device according to claim 5 wherein said surface means for causing a cyclical bounce comprises an elongated bulge extending longitudinally along said surface of at least one of said rolls.
Claim 10
Dependent Claim
195 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, means for mounting said pair of co-acting rolls in engagement with the edge of a moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, together with folding means for engaging an edge portion of said web prior to the entrance of the edge portion between the co-acting rolls for longitudinally folding said edge portion of the web over upon the main body of the web should the web move laterally off center in the direction of said co-acting rolls beyond a predetermined limit.
Claim 11
Dependent Claim
195 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, means for mounting said pair of co-acting rolls in engagement with the edge of a moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, together with folding means for engaging an edge portion of said web prior to the entrance of the edge portion between the co-acting rolls for longitudinally folding said edge portion of the web over upon the main body of the web should the web move laterally off center in the direction of said co-acting rolls beyond a predetermined limit.
Claim 12
Dependent Claim
64 words
The device according to claim 8 wherein said folding means comprises a yoke having an elongated stem and a pair of divergent branches connected to one end of said stem and means for mounting said yoke in cooperative association with said co-acting rolls so that said divergent branches straddle the same edge of the web which is engaged by said pair of co-acting rolls.
Claim 13
Dependent Claim
39 words
The device according to claim 9 wherein said mounting means for said yoke is adjustable for moving the yoke in a plane parallel to a plane through said co-acting rolls toward and away from said edge of said web.
Claim 14
Dependent Claim
74 words
The device according to claim 9 wherein said mounting means for said co-acting rolls includes a mounting bracket, and said mounting means for said yoke comprises a bracket arm projecting from said mounting bracket, said bracket arm having a free end portion through which a bore extends for slidably receiving the stem of said yoke, and fastener means provided in said free end portion for securing said stem in said bore in selected position.
Claim 15
Dependent Claim
179 words
The device according to claim 11 wherein said mounting bracket includes a base portion for mounting said mounting bracket on a support relative to said web and an upstanding main block portion from which said bracket arm projects, said main block portion having an axle receiving bore which is substantially parallel to the bore through said bracket arm, said means for supporting said one of said rolls for rotation about a fixed axis comprising a fixed axle having one end secured in said axle receiving bore and an opposite end portion positioned coaxially within said one roll and bearing means rotatably supporting said one roll for rotation on said fixed axle, and said means for pivotally supporting said other roll comprising a pair of spaced upstanding bracket arms extending upwardly from said main block portion, a pivot shaft supported by said upstanding bracket arms, a pivoted axle having one end portion pivotally supported on said pivot shaft and an opposite end positioned coaxially within said other roll, and bearing means rotatably supporting said other roll on said pivoted axle.
Claim 16
Dependent Claim
118 words
The device according to claim 12 wherein the end portion of said pivoted axle which is pivoted on said pivot shaft includes an extension on the side of said pivot shaft opposite the axle's other end, an adjustment screw extending transversely through said extension of said pivoted axle, a spring seat projecting laterally from said upstanding bracket arms under said adjustment screw, said resilient means comprising a coiled compression spring supported on said spring seat in axial alignment with said adjustment screw, said adjustment screw being adjustable relative to said pivoted axle extension for varying the compression of said spring and thus varying the bias on said pivotally supported roll relative to the roll with the fixed axle.
Claim 17
Dependent Claim
176 words
Apparatus for guiding and centering a moving web of substantially constant width relative to a selected fixed center line, said apparatus comprising a pair of web guiding devices which are spaced transversely opposite each on opposite sides of the selected center line, each of said guiding devices comprising a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means pivotally supporting one of said rolls to swing in a single plane normal to the web and common to both rolls toward and away from the other roll, resilient means for biasing said one roll to swing toward said other roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction.
Claim 18
Dependent Claim
176 words
Apparatus for guiding and centering a moving web of substantially constant width relative to a selected fixed center line, said apparatus comprising a pair of web guiding devices which are spaced transversely opposite each on opposite sides of the selected center line, each of said guiding devices comprising a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means pivotally supporting one of said rolls to swing in a single plane normal to the web and common to both rolls toward and away from the other roll, resilient means for biasing said one roll to swing toward said other roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction.
Claim 19
Dependent Claim
31 words
The apparatus according to claim 14 wherein said inboard roll portion is made of an elastomeric rubber-like material, and said outboard roll portion is made of a hard fluorocarbon resin material.
Claim 20
Dependent Claim
14 words
The apparatus according to claim 15 wherein said hard fluorocarbon resin material is "Teflon".
Claim 21
Dependent Claim
234 words
Apparatus for guiding and centering a moving web of substantially constant width relative to a selected fixed center line, said apparatus comprising a pair of web guiding devices which are spaced transversely opposite each on opposite sides of the selected center line, each of said guiding devices comprising a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means pivotally supporting one of said rolls to swing in a single plane common to both rolls toward and away from the other roll, resilient means for biasing said one roll to swing toward said other roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, each of said guiding devices includes folding means for engaging an edge portion of said web prior to the entrance of the edge portion between the co-acting rolls for longitudinally folding said edge portion of the web over upon the main body of the web should the web move laterally off center in the direction of said co-acting rolls beyond a predetermined limit.
Claim 22
Dependent Claim
234 words
Apparatus for guiding and centering a moving web of substantially constant width relative to a selected fixed center line, said apparatus comprising a pair of web guiding devices which are spaced transversely opposite each on opposite sides of the selected center line, each of said guiding devices comprising a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means pivotally supporting one of said rolls to swing in a single plane common to both rolls toward and away from the other roll, resilient means for biasing said one roll to swing toward said other roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, each of said guiding devices includes folding means for engaging an edge portion of said web prior to the entrance of the edge portion between the co-acting rolls for longitudinally folding said edge portion of the web over upon the main body of the web should the web move laterally off center in the direction of said co-acting rolls beyond a predetermined limit.
Claim 23
Dependent Claim
64 words
The device according to claim 17 wherein said folding means comprises a yoke having an elongated stem and a pair of divergent branches connected to one end of said stem and means for mounting said yoke in cooperative association with said co-acting rolls so that said divergent branches straddle the same edge of the web which is engaged by said pair of co-acting rolls.
Claim 24
Dependent Claim
39 words
The device according to claim 18 wherein said mounting means for said yoke is adjustable for moving the yoke in a plane parallel to a plane through said co-acting rolls toward and away from said edge of said web.
Claim 25
Dependent Claim
216 words
In a web guiding device for guiding a moving web a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, angularly adjustable means for mounting said pair of co-acting rolls outboard of and adjacent one edge of said web so that said rolls project inwardly and are inclined at a predetermined angle toward a selected center line for the moving web in the direction of travel thereof, said rolls each having an inboard roll portion and an outboard roll portion, said roll portions being joined along a common line of juncture, said inboard roll portion being made of a relatively soft, high coefficient of friction material, and said outboard roll portion being made of a relatively hard, low coefficient of friction material, means for supporting one of said rolls to swing relative to the other roll in a plane normal to the web and common to both rolls from a position in which both rolls are parallel to and adjacent each other to a position where the one roll is angularly disposed relative to the other roll with its inboard roll portion spaced a greater distance from the other roll than its outboard roll portion, and means for yieldingly biasing said one roll to swing toward said other roll.
Claim 26
Dependent Claim
216 words
In a web guiding device for guiding a moving web a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, angularly adjustable means for mounting said pair of co-acting rolls outboard of and adjacent one edge of said web so that said rolls project inwardly and are inclined at a predetermined angle toward a selected center line for the moving web in the direction of travel thereof, said rolls each having an inboard roll portion and an outboard roll portion, said roll portions being joined along a common line of juncture, said inboard roll portion being made of a relatively soft, high coefficient of friction material, and said outboard roll portion being made of a relatively hard, low coefficient of friction material, means for supporting one of said rolls to swing relative to the other roll in a plane normal to the web and common to both rolls from a position in which both rolls are parallel to and adjacent each other to a position where the one roll is angularly disposed relative to the other roll with its inboard roll portion spaced a greater distance from the other roll than its outboard roll portion, and means for yieldingly biasing said one roll to swing toward said other roll.
Claim 27
Dependent Claim
23 words
The device according to claim 20 wherein said inboard roll portion is an elastomeric rubber material and said outboard roll portion is Teflon.
Claim 28
Dependent Claim
23 words
The device according to claim 20 wherein said inboard roll portion is a polyurethane resin material and said outboard roll portion is steel.
Claim 29
Dependent Claim
20 words
The device according to claim 20 wherein said biasing means is adjustable to vary the bias on said one roll.
Claim 30
Dependent Claim
24 words
The device according to claim 20 wherein each of said rolls has an inner cylindrical member encompassed by said inboard and outboard roll portions.
Claim 31
Dependent Claim
175 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls in engagement with the edge of a moving web at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, said rolls, including both the inboard and outboard portions, being of substantially uniform cross section from end to end.
Claim 32
Dependent Claim
175 words
In a web guiding device for guiding a moving web, a pair of co-acting rolls for engaging an edge portion of the web on its opposite faces, adjustable means for mounting said pair of co-acting rolls in engagement with the edge of a moving web at a predetermined angle to and at a predetermined distance from a selected center line for the moving web, means supporting one of said rolls for rotation about a fixed axis, means pivotally supporting the other of said rolls to swing in a single plane common to both rolls toward and away from said one roll, resilient means for biasing said pivotally supported roll to swing toward said one roll, at least one of said rolls having cylindrical inboard and outboard roll portions, said inboard roll portion being relatively soft and of a high coefficient of friction, said outboard roll portion being relatively hard and of a low coefficient of friction, said rolls, including both the inboard and outboard portions, being of substantially uniform cross section from end to end.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |