US3964658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller replacing
Assignee: Individual
•
Filing: 1974-09-04
•
Granted: 1976-06-22
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Expires: 1994-09-04
Abstract
Abstract A roller assembly for drawing webs of plastic film or the like comprises an elongated shaft disposed laterally to the direction of web movement with multiple resilient roll portions along its length. Each of the roll portions has multiple roll segments each separately replaceable to allow compensation for uneven wear along the length of the shaft.
Inventors
- 👤 Edwin L. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:12
CPC Classifications
B; B65; B65H; B65H27/00; B65H2404/00; B65H2404/10; B65H2404/13; B65H2404/132; B65H2404/1321
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
Web drawing roller assembly for drawing plastic film comprising, means defining an elongated central shaft support for carrying roll segments, means defining a plurality of flexible surfaced roll segments arranged in longitudinal array along nearly the entire length of the shaft for bearing against a plastic film web to be guided with a gap between each pair of adjacent segments that is less than the actual length of each segment, means for detachably securing each of said roll segments to said central shaft whereby any of said roll segments may be replaced when worn, each roll segment including means defining a central stiffening core of annular form fitting over said shaft support, said means for detachably securing comprising means for keying together the central stiffening cores and said shaft support to prevent relative rotation therebetween while allowing longitudinal sliding therebetween for assembly and disassembly of the roll segments with the shaft, and means for separating axially adjacent roll segments to establish the gaps between each pair of adjacent segments, each of said roll segments comprising multiple flexible surfaced portions separated by notched depressions in the segment.
Claim 2
Dependent Claim
186 words
Web drawing roller assembly for drawing plastic film comprising, means defining an elongated central shaft support for carrying roll segments, means defining a plurality of flexible surfaced roll segments arranged in longitudinal array along nearly the entire length of the shaft for bearing against a plastic film web to be guided with a gap between each pair of adjacent segments that is less than the actual length of each segment, means for detachably securing each of said roll segments to said central shaft whereby any of said roll segments may be replaced when worn, each roll segment including means defining a central stiffening core of annular form fitting over said shaft support, said means for detachably securing comprising means for keying together the central stiffening cores and said shaft support to prevent relative rotation therebetween while allowing longitudinal sliding therebetween for assembly and disassembly of the roll segments with the shaft, and means for separating axially adjacent roll segments to establish the gaps between each pair of adjacent segments, each of said roll segments comprising multiple flexible surfaced portions separated by notched depressions in the segment.
Claim 3
Dependent Claim
54 words
Web drawing roller assembly in accordance with claim 1 wherein said keying means comprise opposed keyways on said shaft and segment cores and means defining at least one key bar of greater length than the individual segments which is insertable through said opposed keyways to lock the shaft and segment cores against relative rotation.
Claim 4
Dependent Claim
28 words
Web drawing roller assembly in accordance with claim 1 wherein at least three of said roll segments are provided in longitudinal array along the length of the shaft.
Claim 5
Dependent Claim
26 words
Web drawing roller assembly in accordance with claim 1 wherein the central stiffening cores and surrounding flexible surfaced material of each segment have axially flush ends.
Claim 6
Dependent Claim
38 words
Web drawing roller assembly in accordance with claim 1 wherein said separating means comprise means defining separating rings of lesser outer diameter than the outer diameter of the flexible surfaced segments for separating adjacent ones of said segments.
Claim 7
Dependent Claim
69 words
Web drawing roller assembly in accordance with claim 5 wherein said keying means comprise opposed keyways on said shaft and segment cores and means defining at least one key bar of greater length than the individual segments which is insertable through said opposed keyways to lock the shaft and segment cores against relative rotation, and wherein said separating rings have sufficiently large internal area to clear said key bar.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |