US3561692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web roll cradle for loosely wound material
Assignee: Kliklok LLC
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Filing: 1969-02-19
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Granted: 1971-02-09
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Expires: 1989-02-19
Abstract
Abstract A cradle for supporting a web roll of material during an unwinding operation is provided wherein the outer turn of the web is maintained in a tight condition on the roll by rotation of the rear support roller at a differential speed slower than the forward roller. A control system is provided wherein flexible brake bands are adapted to engage the periphery of the rear roller and move in the direction opposite to the rotation of said roller in response to a dancer arm to brake the roll upon decrease in demand; said brake bands being driven in the direction of rotation of the roll upon restart of the unwinding operation or increase in demand to overcome the inertia of the roll. An improved roll centering system is provided wherein individual adjustment of the side guides as well as adjustment in unison for positioning the roll along the centerline of the cradle can be effected.
Inventors
- 👤 Nelson R Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:43
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/08; B65H23/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
210 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation by pull on the web free of said roll comprising a pair of elongated support rollers having parallel and horizontally disposed axis, said rollers being spaced to allow said roll to be supported at spaced contact points on the periphery of the same, said rollers including a forward roller to receive the web from the periphery of the roll and direct the same away from the roll during the unwinding operation and a rear roller, means for positively rotatively connecting said rollers together so that the surface of said rear roller rotates at a differential speed slower than said forward roller, whereby the final turn of said web normally slips on the periphery of said roll between said contact points to maintain tension therein, said forward roller contacting said web around at least substantially 90* and the operative surfaces of said rollers are provided with the same frictional properties whereby slippage is assured of being maintained solely at said rear roller when said final turn of said web is tight, and frictional brake means applied to the surface of at least one of said rollers to insure against overrunning of said rollers and slackness in said web.
Claim 2
Dependent Claim
210 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation by pull on the web free of said roll comprising a pair of elongated support rollers having parallel and horizontally disposed axis, said rollers being spaced to allow said roll to be supported at spaced contact points on the periphery of the same, said rollers including a forward roller to receive the web from the periphery of the roll and direct the same away from the roll during the unwinding operation and a rear roller, means for positively rotatively connecting said rollers together so that the surface of said rear roller rotates at a differential speed slower than said forward roller, whereby the final turn of said web normally slips on the periphery of said roll between said contact points to maintain tension therein, said forward roller contacting said web around at least substantially 90* and the operative surfaces of said rollers are provided with the same frictional properties whereby slippage is assured of being maintained solely at said rear roller when said final turn of said web is tight, and frictional brake means applied to the surface of at least one of said rollers to insure against overrunning of said rollers and slackness in said web.
Claim 3
Dependent Claim
24 words
The combination of claim 1 wherein said forward roller contacts said web around substantially 180* to increase the frictional contact at said forward roller.
Claim 4
Dependent Claim
45 words
The combination of claim 2 wherein said brake means comprises a flexible band extending around a portion of one of said rollers and control means for operating said brake means in response to Slackness in said web, whereby excess slackness in said roll is prevented.
Claim 5
Dependent Claim
95 words
The combination of claim 3 wherein said control means includes a dancer arm making a loop in said web after passing from engagement with said forward roller, said brake band being attached to said dancer arm so as to move opposite to the rotation of said one roller upon sensing an increase in size of said loop, and means to move said brake band in the direction of rotation of said one roller to assist rotation of said rollers and thereby overcome inertia of said roller upon sensing a decrease in size of said loop.
Claim 6
Dependent Claim
47 words
The combination of claim 4 wherein is provided means to limit the movement of said brake band in the direction of rotation of said rollers whereby said brake band becomes slack upon reduction of said loop to a minimum to allow substantially free rotation of said rollers.
Claim 7
Dependent Claim
126 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation comprising a pair of elongated support rollers having parallel and horizontally disposed axes, said rollers being spaced to allow said roll to be supported at spaced contact points, the improvement comprising brake means for retarding said rollers, control means for operating said brake means in response to the slackness sensed in said web, said brake means being driven by said control means in the direction opposite to the direction of rotation of said rollers to retard said roll upon sensing an increase in slackness, and means for driving said brake means in the direction of rotation of said rollers to assist in overcoming inertia of said roll upon sensing a decrease in slackness.
Claim 8
Dependent Claim
126 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation comprising a pair of elongated support rollers having parallel and horizontally disposed axes, said rollers being spaced to allow said roll to be supported at spaced contact points, the improvement comprising brake means for retarding said rollers, control means for operating said brake means in response to the slackness sensed in said web, said brake means being driven by said control means in the direction opposite to the direction of rotation of said rollers to retard said roll upon sensing an increase in slackness, and means for driving said brake means in the direction of rotation of said rollers to assist in overcoming inertia of said roll upon sensing a decrease in slackness.
Claim 9
Dependent Claim
75 words
The combination of claim 6 wherein said brake means includes a flexible band trained around and frictionally engaging a peripheral portion of one of said rollers, said control means includes a pivotal dancer arm connected to a first end of said brake band, means carried by the free end of said dancer arm to form a control loop in said web and said drive means being interconnected with a second end of said brake band.
Claim 10
Dependent Claim
39 words
The combination of claim 7 wherein said drive means includes a pivotally mounted lever connected to said second end of said brake band, and spring means for pivoting said lever to drive said brake band in the assist direction.
Claim 11
Dependent Claim
71 words
The combination of claim 8 wherein is further provided adjustable stop means for limiting the movement of said lever in the assist direction so as to allow release of said brake band from said one roller, and stop means to limit movement in the braking direction to cause said brake band to be tightened upon increase in slackness in said web as represented by an increase in size of said loop.
Claim 12
Dependent Claim
40 words
The combination of claim 7 wherein is provided eccentric release means for engaging said dancer arm to effect reduction of said loop and release of said brake means to allow free rotation of said rollers during threading of said web.
Claim 13
Dependent Claim
61 words
The combination of claim 7 wherein is further provided a spring attached to the free end of said dancer arm to tend to form said loop, said spring having a tension coefficient which progressively increases as the size of the loop in said web decreases whereby to prevent overtravel of said arm in response to a sudden demand in said web.
Claim 14
Dependent Claim
46 words
The combination of claim 6 wherein said brake band is provided with one-way clutch means for increasing the frictional engagement of said brake band against said roller in the assist direction to increase the force and range of the driving action overcoming inertia of said roll.
Claim 15
Dependent Claim
47 words
The combination of claim 12 wherein said clutch means include crescent-shaped slits in said band for providing reaction edges in the direction of rotation, the portion of band bounded within the area defined by said slits serving to provide smooth retarding during movement in the braking direction.
Claim 16
Dependent Claim
141 words
An arborless roll cradle for supporting a web roll during unwinding operation including a pair of elongated support rollers haVing parallel and horizontally disposed axes, said rollers being spaced to allow said roll to be supported at spaced contact points on the periphery of the same, the improvement comprising upstanding alignment rods extending through the space between said rollers perpendicular to said plane, guide means on said rods for engaging the respective end faces of said roll to maintain centering on said support rollers, a support bar extending along the length of said rollers for said rods, means on said bar for allowing individual adjustment of said rods with respect to the end faces of said roll and means at one end of said bar to adjust said rollers in unison to cause repositioning of said roll on said support rollers.
Claim 17
Dependent Claim
141 words
An arborless roll cradle for supporting a web roll during unwinding operation including a pair of elongated support rollers haVing parallel and horizontally disposed axes, said rollers being spaced to allow said roll to be supported at spaced contact points on the periphery of the same, the improvement comprising upstanding alignment rods extending through the space between said rollers perpendicular to said plane, guide means on said rods for engaging the respective end faces of said roll to maintain centering on said support rollers, a support bar extending along the length of said rollers for said rods, means on said bar for allowing individual adjustment of said rods with respect to the end faces of said roll and means at one end of said bar to adjust said rollers in unison to cause repositioning of said roll on said support rollers.
Claim 18
Dependent Claim
58 words
The combination of claim 14 wherein said individual rod-adjusting means comprises a threaded portion at said one end of said rod, and a collar on said bar threadedly engaged by said threaded portion of said rod, said one end of said rod being adapted to engage said bar through said collar to bind the same in adjusted position.
Claim 19
Dependent Claim
47 words
The combination of claim 15 wherein said bar and said collar are polygonal to prevent relative rotation, means for holding said bar against rotation with respect to said rollers and wherein said unison adjusting means includes a captive sleeve threadedly engaging said one end of said bar.
Claim 20
Dependent Claim
125 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation comprising a pair of elongated support rollers having parallel and horizontally disposed axis, said rollers being spaced to allow said roll to be supported at spaced contact points, the improvement comprising brake means for retarding said rollers, control means for operating said brake means in response to the slackness sensed in said web, said control means including a U-shaped dancer arm having cross means forming a control loop in said web and spaced support means for said cross means, the ends of said cross means being mounted for relative movement with respect to said support means such as to allow skewing of said dancer arm to accommodate differential tension across said web.
Claim 21
Dependent Claim
125 words
An arborless roll cradle for supporting a web roll during intermittent unwinding operation comprising a pair of elongated support rollers having parallel and horizontally disposed axis, said rollers being spaced to allow said roll to be supported at spaced contact points, the improvement comprising brake means for retarding said rollers, control means for operating said brake means in response to the slackness sensed in said web, said control means including a U-shaped dancer arm having cross means forming a control loop in said web and spaced support means for said cross means, the ends of said cross means being mounted for relative movement with respect to said support means such as to allow skewing of said dancer arm to accommodate differential tension across said web.
Claim 22
Dependent Claim
21 words
The combination of claim 17 wherein is provided means for mounting said ends for pivotal movement transverse to said cross means.
Claim 23
Dependent Claim
29 words
The combination of claim 18 wherein said ends pass through an enlarged aperture of said support means, said mounting means including a cotter pin passing through said enlarged aperture.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |