Patent US4759284A successfully refreshed from Google Patents.
US4759284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dampener roller apparatus
Assignee: Purolator Products Co LLC
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Filing: 1986-02-19
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Granted: 1988-07-26
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Expires: 2006-02-19
Abstract
Abstract A dampener roller cartridge for mounting on a cylindrical support comprising a core tube having a central bore to receive the cylindrical support, the core tube being characterized by having an annular wall thickness of at least one-third the radius of the tube, and a coherent network structure providing a density of less than 0.5, the plastic substance and the network structure providing the tube with sufficient resilience to be resiliently deformed by a radially applied force by a mating roller and to recover its original shape after the cessation of the radially applied force, and further providing the core tube with sufficient rigidity to permit tight slidable mounting of the core tube on the cylindrical support, and a moisture-absorbent, outer sleeve secured about the circumference of the core tube. Also disclosed are securing a fabric sleeve to a core tube by heat-shrinking and double-sided adhesive tape near the ends of the core tube to prevent axial and circumferential slippage of the sleeve; and an assembly for supporting a dampener roller cartridge on a support cylinder between two end caps, one of which is held against the support cylinder via threaded axial connectors.
Inventors
- 👤 Clifford D. Haggard
- 👤 Ralph D. Terhune
- 👤 Garfield A. Wood, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:13
CPC Classifications
B; B41; B41N; B41N7/00; B41N7/04; B41F; B41F13/00; B41F13/08; B41N2207/00; B41N2207/02; B41N2207/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
132 words
A dampener roller cartridge for mounting on a cylindrical support comprising a core tube of plastic substance having a central bore to receive said cylindrical support, said core tube characterized by having an annular wall thickness at least one third the radius of the tube, and a coherent network structure providing a density of less than 0.5 gram/cc, said plastic substance and said network structure providing said tube with sufficient resilience to be resiliently deformed by a radially applied force by a mating roller and to recover its original shape after the cessation of said radially applied force, and further providing said tube with sufficient rigidity to permit tight slidable mounting of said core tube on said cylindrical support, and a moisture-absorbent, outer sleeve secured about the circumference of said core tube.
Claim 2
Dependent Claim
132 words
A dampener roller cartridge for mounting on a cylindrical support comprising a core tube of plastic substance having a central bore to receive said cylindrical support, said core tube characterized by having an annular wall thickness at least one third the radius of the tube, and a coherent network structure providing a density of less than 0.5 gram/cc, said plastic substance and said network structure providing said tube with sufficient resilience to be resiliently deformed by a radially applied force by a mating roller and to recover its original shape after the cessation of said radially applied force, and further providing said tube with sufficient rigidity to permit tight slidable mounting of said core tube on said cylindrical support, and a moisture-absorbent, outer sleeve secured about the circumference of said core tube.
Claim 3
Dependent Claim
16 words
The dampener roller cartridge of claim 1 wherein said moisture-absorbent, outer sleeve is a seamless fabric.
Claim 4
Dependent Claim
22 words
The dampener roller cartridge of claim 2 wherein said sleeve is heat-shrunk to fit tightly about the circumference of said core tube.
Claim 5
Dependent Claim
21 words
The dampener roller cartridge of claim 2 wherein said fabric is a looped pile of polyvinyl alcohol yarn and rayon yarn.
Claim 6
Dependent Claim
22 words
The dampener roller cartridge of claim 1 wherein said sleeve is heat-shrunk to fit tightly about the circumference of said core tube.
Claim 7
Dependent Claim
83 words
The dampener roller cartridge of claim 5 further comprising adhesive tape circumferentially disposed about said core tube intermediate said core tube and said outer sleeve in order to prevent axial and circumferential movement of said sleeve on said core tube, said adhesive tape being a thin plastic film having adhesive on each side, the adhesive on the side of said tape adjacent to said core tube being pressure-activated, and the adhesive on the side of the tape adjacent said outer sleeve being heat-activated.
Claim 8
Dependent Claim
29 words
The dampener roller cartridge of claim 6 wherein there are two pieces of adhesive tape, said pieces of adhesive tape being located near the ends of said core tube.
Claim 9
Dependent Claim
22 words
The dampener roller cartridge of claim 1 wherein said coherent network comprises a mass of melt-blown plastic fibers formed into said core.
Claim 10
Dependent Claim
13 words
The dampener roller cartridge of claim 8 wherein said plastic substance comprises polyolefin.
Claim 11
Dependent Claim
14 words
The dampener roller cartridge of claim 9 wherein said network comprises melt-blown polypropylene fibers.
Claim 12
Dependent Claim
14 words
The dampener roller of claim 1 wherein said coherent network comprises a plastic foam.
Claim 13
Dependent Claim
16 words
The dampener roller of claim 11 wherein said coherent network comprises foamed polyethylene or foamed polyurethane.
Claim 14
Dependent Claim
17 words
The dampener roller of claim 1 wherein said coherent network comprises plastic fibers bonded with phenolic resin.
Claim 15
Dependent Claim
15 words
The dampener roller of claim 1 wherein said coherent network comprises string wound plastic fibers.
Claim 16
Dependent Claim
16 words
The dampener roller of claim 13 or 14 wherein said fibers comprise polyester, polypropylene or rayon.
Claim 17
Dependent Claim
21 words
The dampener roller cartridge of claim 1 wherein said coherent network has a shore scale A durometer between 40 and 50.
Claim 18
Dependent Claim
19 words
The dampener roller cartridge of claim 1 wherein said coherent network has a density between 0.15 and 0.25 gram/cc.
Claim 19
Dependent Claim
159 words
A core tube for use with a moisture-absorbent outer sleeve as a dampener roller cartridge for mounting on a cylindrical support, said core tube being made of plastic substance having a central bore to receive said cylindrical support, said core tube characterized by having an annular wall thickness at least one third the radius of the tube, and a coherent network structure providing a density of between 0.15 and 0.25 gram/cc, said plastic substance in said network structure providing said tube with sufficient resilience to be resiliently deformed by a radially applied force by a mating roller and to recover its original shape after the cessation of said radially applied force, and further providing said tube with sufficient rigidity to permit tight slidable mounting of said core tube on said cylindrical support, said coherent network comprising a mass of melt-blown polypropylene fibers formed into said core, said coherent network having a Shore scale A durometer between 40 and 50.
Claim 20
Dependent Claim
159 words
A core tube for use with a moisture-absorbent outer sleeve as a dampener roller cartridge for mounting on a cylindrical support, said core tube being made of plastic substance having a central bore to receive said cylindrical support, said core tube characterized by having an annular wall thickness at least one third the radius of the tube, and a coherent network structure providing a density of between 0.15 and 0.25 gram/cc, said plastic substance in said network structure providing said tube with sufficient resilience to be resiliently deformed by a radially applied force by a mating roller and to recover its original shape after the cessation of said radially applied force, and further providing said tube with sufficient rigidity to permit tight slidable mounting of said core tube on said cylindrical support, said coherent network comprising a mass of melt-blown polypropylene fibers formed into said core, said coherent network having a Shore scale A durometer between 40 and 50.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |