US3692251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding,unwinding and tensioning apparatus
Assignee: Beloit Corp
•
Filing: 1970-10-26
•
Granted: 1972-09-19
•
Expires: 1990-10-26
Abstract
Abstract The invention relates to filament tension regulation apparatus useful to regulate the tension in a moving filament such as during the winding or unwinding of a web or threadlike filament. The invention relates further to a web guide roller assembly for assisting in the movement of a web relative to a roll of the web material such as a splicing roll apparatus useful in web unwinding or a lay-on roll apparatus for use in web winding. The invention further relates to web unwinding apparatus, to web winding apparatus, and to web winding and unwinding apparatus involving combinations of the splicing roll apparatus, the lay-on roll apparatus, and web tension regulating apparatus. The filament tension regulation apparatus comprises a roller mounted for rotation in members disposed at the ends of the roller, the members being supported by pivot arms extending upwardly and downwardly of the member. The arms are of equal length and the roller is centrally located on the member between the pivot areas such that the roller is capable of horizontal motion supported by the pivot arms. The moving filament engages the roller in such a way that horizontal force is applied to the roller in a direction in opposition to a desired pre-determined horizontal force. Changes in filament tension relative to the pre-determined horizontal force cause horizontal motion of the roller and this motion is utilized to adjust tension to a desired value such as by changing filament speed. The web guiding roll apparatus comprises a pair of rollers mounted for rotation and pivotally supported by pivot arms as in the case of the filament tension regulating device. The rollers, however, are located at points symmetrical about a point midway between the pivot arms and thus will undergo pivoting motion. The arms are of equal length and the rollers are preferably of equal mass whereby the device is easily moved into and out of engagement with a web roll for splicing during unwinding or for forming a nip during winding.
Inventors
- 👤 James J Melead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:13
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/16; B65H19/00; B65H23/18; B65H23/182; B65H23/1825
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
231 words
A web guide roller assembly for assisting in the movement of a web relative to a roll of the web material comprising: a pair of guide roller support members; a pair of first pivot arms, each pivot arm of the pair supporting one of said guide roller support members, said pivot arms being pivotally secured to said guide roller support member at a first pivot point and to a fixed support at a point higher than said first pivot point; a pair of second pivot arms, each pivot arm of the pair pivotally supporting one of said guide roller support members, said pivot arms being pivotally secured to said guide roller support member at a second pivot point and to a fixed support at a point lower than said second pivot point; a pair of web guiding rollers mounted for rotation adjacent the first and second pivot points having their roller axes transverse to the direction of motion of the moving web and located symmetrically about a point midway on a line between the first and second pivot points; said first and second pivot arms being of equal effective length and guiding said guide roller support member for motion in a vertical plane transverse to said roller axes; and means for moving said guide roller support member to urge one of said web guide rollers against said roll of web material.
Claim 2
Dependent Claim
231 words
A web guide roller assembly for assisting in the movement of a web relative to a roll of the web material comprising: a pair of guide roller support members; a pair of first pivot arms, each pivot arm of the pair supporting one of said guide roller support members, said pivot arms being pivotally secured to said guide roller support member at a first pivot point and to a fixed support at a point higher than said first pivot point; a pair of second pivot arms, each pivot arm of the pair pivotally supporting one of said guide roller support members, said pivot arms being pivotally secured to said guide roller support member at a second pivot point and to a fixed support at a point lower than said second pivot point; a pair of web guiding rollers mounted for rotation adjacent the first and second pivot points having their roller axes transverse to the direction of motion of the moving web and located symmetrically about a point midway on a line between the first and second pivot points; said first and second pivot arms being of equal effective length and guiding said guide roller support member for motion in a vertical plane transverse to said roller axes; and means for moving said guide roller support member to urge one of said web guide rollers against said roll of web material.
Claim 3
Dependent Claim
17 words
A web guide roller assembly according to claim 1 wherein said guide rollers are of equal mass.
Claim 4
Dependent Claim
24 words
A web guide roller assembly according to claim 2 wherein said guide rollers are mounted for rotation at said first and second pivot points.
Claim 5
Dependent Claim
51 words
A web guide roller assembly according to claim 1 for unwinding a web further including means for rotatably mounting a web supply roll, means for unwinding a web from a rotatably mounted web supply roll, and means for guiding the unwinding web in contact with said pair of web guide rollers.
Claim 6
Dependent Claim
85 words
A web guide roller assembly according to claim 4 for continuously unwinding a web from a plurality of web supply rolls further including: means for positioning a fresh web supply roll in adjacency with a surface of an unwinding web, and means for moving said guide roller support member to move one of said web guide rollers against the outer surface of said unwinding web to urge the unwinding web against the web in said fresh web roll to splice the webs for continuous unwinding.
Claim 7
Dependent Claim
22 words
A web guide roller assembly according to claim 5 further including knife means to sever the trailing end of the unwinding web.
Claim 8
Dependent Claim
39 words
A web guide roller assembly according to claim 1 for winding a web further including: means for rotatably mounting a web roll core; and means for guiding the winding web in contact with said pair of web guide rollers.
Claim 9
Dependent Claim
78 words
A web guide roller assemBly according to claim 7 for continuously winding a web into a plurality of web rolls further including: means for positioning an empty web roll core in adjacency with a surface of the winding web; and means for moving said guide roller support member to move one of said web guide rollers against the other surface of said winding web to form a pressure nip between the winding web and the empty web core.
Claim 10
Dependent Claim
18 words
A web guide roller assembly according to claim 8 further including knife means to sever the winding web.
Claim 11
Dependent Claim
40 words
A web guide roller assembly according to claim 9 further including means mounted on said knife means to guide the severed leading end of the winding web around the empty core to initiate winding a web roll on said core.
Claim 12
Dependent Claim
276 words
In web processing apparatus comprising means for continuously unwinding a plurality of web rolls by splicing the trailing end of an unwound roll to the leading end of a fresh roll by means of a splicing roll, means for processing the unwound web, means for continuously winding a plurality of web rolls by severing the trailing end of a wound roll and starting a fresh roll with the leading end of the severed web by means of a lay-on roll, and means for regulating the tension of the moving web; the improvement wherein at least one of said splicing roll, said lay-on roll and said tension regulating means comprises a roller mounted for rotation in a pivotally mounted Z bar assembly, said assembly comprising: a pair of roller support members; a first pivot arm supporting each of said roller support members pivotally secured to said roller support members at a first pivot point and to a fixed support at a point higher than said first pivot point; a second pivot arm pivotally supporting each of said roller support members pivotally secured to said roller support member at a second pivot point and to a fixed support at a point lower than said second pivot point; said roller being mounted for rotation adjacent a line through said first and second pivot points; said first and second pivot arms being of equal effective length and guiding said roller support member for motion in a vertical plane transverse to the roller axis, whereby a point midway of a line connecting said first and second pivot points is moveable in a purely horizontal path substantially normal to the roller axis.
Claim 13
Dependent Claim
276 words
In web processing apparatus comprising means for continuously unwinding a plurality of web rolls by splicing the trailing end of an unwound roll to the leading end of a fresh roll by means of a splicing roll, means for processing the unwound web, means for continuously winding a plurality of web rolls by severing the trailing end of a wound roll and starting a fresh roll with the leading end of the severed web by means of a lay-on roll, and means for regulating the tension of the moving web; the improvement wherein at least one of said splicing roll, said lay-on roll and said tension regulating means comprises a roller mounted for rotation in a pivotally mounted Z bar assembly, said assembly comprising: a pair of roller support members; a first pivot arm supporting each of said roller support members pivotally secured to said roller support members at a first pivot point and to a fixed support at a point higher than said first pivot point; a second pivot arm pivotally supporting each of said roller support members pivotally secured to said roller support member at a second pivot point and to a fixed support at a point lower than said second pivot point; said roller being mounted for rotation adjacent a line through said first and second pivot points; said first and second pivot arms being of equal effective length and guiding said roller support member for motion in a vertical plane transverse to the roller axis, whereby a point midway of a line connecting said first and second pivot points is moveable in a purely horizontal path substantially normal to the roller axis.
Claim 14
Dependent Claim
118 words
Improved web processing apparatus according to claim 11 wherein said tension regulating means comprises said Z bar assembly, said roller being mounted at a point midway on a line between said first and second pivot points, said Z bar assembly further including: means to guide the moving web into contact with said roller in such a way as to apply a horizontal force against said roller in a first direction normal to the roller axis; means for applying a pre-determined force against the roller substantially normal to the roller axis in a horizontal direction opposite to said first direction whereby the roller moves in said purely horizontal path in response to web tension relative to said pre-determined force.
Claim 15
Dependent Claim
78 words
Improved web processing apparatus according to claim 11 wherein said splicing roll means comprises said Z bar assembly, said assembly including: a pair of rollers mounted for rotation with the roller axes symmetrical about a point midway on a line connecting said first and second pivot points; means to guide an unwinding web in engagement with said rollers; and means to move said rollers to urge an unwinding web against a fresh web roll for splicing the webs.
Claim 16
Dependent Claim
88 words
Improved web processing apparatus according to claim 11 wherein said lay-on roll means comprises said Z bar assembly, said assembly including: a pair of rollers mounted for rotation with the roller axes symmetrical about a point midway on a line connecting said first and second pivot points; means to guide a winding web in engagement with said rollers; and means to move said rollers to urge a winding web against an empty web roll core to form a pressure nip fOr winding a web roll in said core.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |