US3685756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for slitting belt
Assignee: Chain Gear Inc
•
Filing: 1969-02-26
•
Granted: 1972-08-22
•
Expires: 1989-02-26
Abstract
Abstract Belt slitting machine and method including two sets of spaced lifting arms each of which supports a spindle which is rotatably secured to the lift arms by a retractable pin nested in an end of each spindle. The lift arms are hydraulically positionable both vertically and laterally. The machine includes a set of drive and pressure rollers for pushing the belt into a knife which is pivotally mounted for piercing the belt from above. A second set of drive and pressure rollers are located downstream of the knife to pull the belt as it is being pushed. To apply tension, the drive roller of the tension set is of a diameter slightly larger than the drive roller of the pusher set. The spindles are rotated by hydraulic motors which are in circuit with the hydraulic motor for the drive rollers and with suitable valves so that the rotation of each spindle is controlled independently of the drive rollers to assure tensioning of the belt regardless of the speed of the drive rollers and regardless of the direction of rotation. Adjustable guides are spring biased in position to guide a cutout portion of a belt and are automatically disengaged at the end of the cut-out portion. The method involves feeding the belt, piercing, slitting, guiding, and positioning steps.
Inventors
- 👤 Norbert M Marx
- 👤 Carl G Lichtenwalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:18
CPC Classifications
C; C14; C14B; C14B5/00; C14B5/04; B; B26; B26D; B26D3/00; B26D3/003; B26D1/00; B26D1/01; B26D1/02; B26D1/025; B26D1/12; B26D1/14; B26D1/157; B26D1/18; B26D1/185; B26D9/00; B29; B29L; B29L2029/00; Y; Y10; Y10T; Y10T83/00; Y10T83/323
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
93 words
The method of slitting a belt or the like and winding the slit ends on spools or the like comprising: feeding the belt along a predetermined path until its forward end is slightly downstream of a cutting station; piercing the belt slightly upstream of its forward end at said cutting station; slitting the belt longitudinally after piercing; stopping the belt when its forward end reaches the winding spools; fastening the forward end of the belt on the winding spools; and feeding, slitting and winding the belt until the desired slit length is obtained.
Claim 2
Independent Claim
93 words
The method of slitting a belt or the like and winding the slit ends on spools or the like comprising: feeding the belt along a predetermined path until its forward end is slightly downstream of a cutting station; piercing the belt slightly upstream of its forward end at said cutting station; slitting the belt longitudinally after piercing; stopping the belt when its forward end reaches the winding spools; fastening the forward end of the belt on the winding spools; and feeding, slitting and winding the belt until the desired slit length is obtained.
Claim 3
Dependent Claim
37 words
The method defined by claim 1, further including the step of manually slitting the unslit end of the belt after fastening to said winding spools but before feeding and winding the belt to obtain the desired length.
Claim 4
Dependent Claim
18 words
The method defined by claim 1, wherein said belt is pierced within three inches of its forward end.
Claim 5
Dependent Claim
18 words
The method defined by claim 2, wherein said belt is pierced within three inches of its forward end.
Claim 6
Independent Claim
96 words
The method of positioning a roll of stock belt along the vertical guide edge of a belt-slitting machine, comprising: placing a stock roll of belt on a spindle while the roll is on a support; raising the spindle until the roll is off the support and moving it laterally toward said vertical edge; lowering the spindle until the roll rests on a support; moving the spindle laterally away from the vertical guide while the roll rests on a support; and repeating said raising, lowering and laterally moving steps until the roll abuts against said vertical guide.
Claim 7
Independent Claim
96 words
The method of positioning a roll of stock belt along the vertical guide edge of a belt-slitting machine, comprising: placing a stock roll of belt on a spindle while the roll is on a support; raising the spindle until the roll is off the support and moving it laterally toward said vertical edge; lowering the spindle until the roll rests on a support; moving the spindle laterally away from the vertical guide while the roll rests on a support; and repeating said raising, lowering and laterally moving steps until the roll abuts against said vertical guide.
Claim 8
Dependent Claim
114 words
A belt slitting machine comprising: a cutting table; drive means for moving a belt along a path across said table; cutter means arranged in said path for slitting the belt as it is moved; roll support means at opposite ends of said path, said roll support means each including a pair of movable lift arms for supporting a spindle and hydraulically powered means for moving said lift arms vertically; means for rotating the downstream spindle to wind the belt on a roll and to rotate the upstream spindle to unwind the belt on the other roll; and said lift arms include extendible pin means for selectively supporting and releasing one end of a spindle.
Claim 9
Dependent Claim
114 words
A belt slitting machine comprising: a cutting table; drive means for moving a belt along a path across said table; cutter means arranged in said path for slitting the belt as it is moved; roll support means at opposite ends of said path, said roll support means each including a pair of movable lift arms for supporting a spindle and hydraulically powered means for moving said lift arms vertically; means for rotating the downstream spindle to wind the belt on a roll and to rotate the upstream spindle to unwind the belt on the other roll; and said lift arms include extendible pin means for selectively supporting and releasing one end of a spindle.
Claim 10
Dependent Claim
18 words
The belt-slitting machine defined by claim 6, further including hydraulically powered means for moving said lift arms laterally.
Claim 11
Dependent Claim
18 words
The belt-slitting machine defined by claim 6, further including hydraulically powered means for moving said lift arms laterally.
Claim 12
Independent Claim
88 words
The method of cutting and guiding a belt having a cut-out portion removed, comprising: moving the belt along a predetermined path; slidably engaging the edge of the cut-out portion to guide the belt along said path; slitting the belt as it is moved along the path; slidably engaging the outer edge of the belt at the end of said cut-out portion; disengaging the edge of the cut-out portion at the end of said cut-out portion; and continuing the slitting step until the desired length of belt is slit.
Claim 13
Independent Claim
88 words
The method of cutting and guiding a belt having a cut-out portion removed, comprising: moving the belt along a predetermined path; slidably engaging the edge of the cut-out portion to guide the belt along said path; slitting the belt as it is moved along the path; slidably engaging the outer edge of the belt at the end of said cut-out portion; disengaging the edge of the cut-out portion at the end of said cut-out portion; and continuing the slitting step until the desired length of belt is slit.
Claim 14
Dependent Claim
80 words
A belt-slitting machine or the like, comprising: means for supporting a belt for movement along a predetermined path; means for pushing the belt along said predetermined path; means in said path for cutting the belt; and means in said path downstream of said cutting means for pulling the belt along said path at a rate sLightly greater than said pushing means, and roll support means at opposite ends of said path including raisable and lowerable, reversible, winding and unwinding means.
Claim 15
Dependent Claim
80 words
A belt-slitting machine or the like, comprising: means for supporting a belt for movement along a predetermined path; means for pushing the belt along said predetermined path; means in said path for cutting the belt; and means in said path downstream of said cutting means for pulling the belt along said path at a rate sLightly greater than said pushing means, and roll support means at opposite ends of said path including raisable and lowerable, reversible, winding and unwinding means.
Claim 16
Dependent Claim
23 words
The belt-slitting machine of claim 10 and wherein said roll support means are raisable and lowerable areas supporting said winding and unwinding means.
Claim 17
Dependent Claim
49 words
The belt-slitting machine of claim 11 and including control means for automatically varying the speed of said winding and unwinding means independently of the speed of said belt moving means so that the lineal speed of the belt passing through the cutter is maintained constant at said selected speed.
Claim 18
Dependent Claim
55 words
The belt-slitting machine of claim 12 and wherein said supporting means includes a table and each of said pushing means and said pulling means includes a drive roller and a pressure roller, the diameter of said drive roller in said pulling means being slightly greater in diameter than the drive roller in said pushing means.
Claim 19
Dependent Claim
68 words
In a belt-slitting machine having a belt-supporting table, feed means for moving the belt across said table and a cutter positioned over said table for slitting the belt as it is moved thereacross, an adjustable guide including: a vertical guide surface engageable with the side edge of a cut-out portion of a belt; and means for automatically disengaging the guide surface at the end of said cut-out portion.
Claim 20
Dependent Claim
68 words
In a belt-slitting machine having a belt-supporting table, feed means for moving the belt across said table and a cutter positioned over said table for slitting the belt as it is moved thereacross, an adjustable guide including: a vertical guide surface engageable with the side edge of a cut-out portion of a belt; and means for automatically disengaging the guide surface at the end of said cut-out portion.
Claim 21
Dependent Claim
56 words
The belt-slitting machine of claim 14, wherein said means for automatically disengaging the guide surface includes a bottom surface engageable with the top surface of the belt and with said vertical guide surface and means releasably supporting said bottom surface for movement vertically to ride up on said belt at the end of a cut-out portion.
Claim 22
Dependent Claim
17 words
The machine of claim 15, and further including means for moving the guide laterally over the belt.
Claim 23
Dependent Claim
41 words
The machine of claim 16, and wherein said guide includes a lower shoe defining said vertical and bottom surfaces and a mounting bar pivotally mounted to said machine, and wherein said lower shoe is spring biased downwardly from said mounting bar.
References Cited (Backward Citations)
US868761A
Cited
US1676883A
Cited
US2181049A
Cited
US2363112A
Cited
US2612950A
Cited
US2698359A
Cited
US2569589A
Cited
US2593388A
Cited
US2827961A
Cited
US2796930A
Cited
US3055605A
Cited
US3275254A
Cited
US3323739A
Cited
US3321147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |