US3970186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper for a composite print wheel
Assignee: Xerox Corp
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Filing: 1974-09-25
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Granted: 1976-07-20
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Expires: 1994-09-25
Abstract
Abstract A damper for a composite print wheel comprising two generally circular rings of an elastomer impregnated fabric material with a ring being adhesively coupled to each side of the beams of the print wheel and each ring being adhesively coupled to the other ring in the regions between the beams.
Inventors
- 👤 Gordon Sohl
- 👤 Svetislav Mitrovich
- 👤 Ernest L. Staples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:41
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/42; B41J1/00; B41J1/22; B41J1/24; B41J1/28; B41J1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A print wheel for an impact printer comprising an insert member having a plurality of beams extending radially outward from a generally circular center section in a substantially common plane with the beams being deflectible in a print direction generally normal to the common plane, character slugs near the outer ends of the beams having impact surfaces engageable by hammer means to deflect the slug in the print direction enabling print surfaces on the slugs shaped in the form of characters to cooperate in a process for marking a record medium, a first generally circular damper means adhesively coupled to one side of the beams, and a second generally circular damper means adhesively coupled to the other side of the beams, said first and second damper means being adhesively coupled to each other in the regions between the beams.
Claim 2
Dependent Claim
139 words
A print wheel for an impact printer comprising an insert member having a plurality of beams extending radially outward from a generally circular center section in a substantially common plane with the beams being deflectible in a print direction generally normal to the common plane, character slugs near the outer ends of the beams having impact surfaces engageable by hammer means to deflect the slug in the print direction enabling print surfaces on the slugs shaped in the form of characters to cooperate in a process for marking a record medium, a first generally circular damper means adhesively coupled to one side of the beams, and a second generally circular damper means adhesively coupled to the other side of the beams, said first and second damper means being adhesively coupled to each other in the regions between the beams.
Claim 3
Dependent Claim
21 words
The print wheel of claim 1 wherein said first and second damper means include a butadiene acrylonitrile copolymer coated nylon fabric.
Claim 4
Dependent Claim
44 words
The print wheel of claim 1 having an outside diameter of about 3.10 inches and having a first and second damper means having an outside diameter of about 2.1 inches and an outside diameter greater than the diameter of the generally circular center section.
Claim 5
Dependent Claim
51 words
The print wheel of claim 1 wherein the first and second damper means are coupled to the beams to alter their deflection properties by applying a load W to the beams, said load W approaches a load F required to deflect the beam the distance needed for marking a record member.
Claim 6
Dependent Claim
100 words
The print wheel of claim 4 wherein the shear load for the damper coupled section of a beam is given by ##EQU5## and the shear load for the non-damper covered section of a beam is given by ##EQU6## and the damper means is located relative to the beams to obtain the condition wherein the ratio of W to F approaches unity wherein E is the modulus of elasticity, I is moment of inertia, ##EQU7## y n is the displacement at the point of damping, y o is the maximum displacement, and l e is the flexible length of the beam.
Claim 7
Dependent Claim
34 words
The print wheel of claim 5 wherein E ≅ 29 × 10 6 psi, I ≅ 0.576 × 10.sup. -9 in 4 , l e ≅ 0.65 inch and y o ≅ 0.095 inch.
Claim 8
Dependent Claim
50 words
The print wheel of claim 6 wherein the following relations are obtained for y n of 0.018, 0.019 and 0.020 inches: y.sub.n W F W/F
______________________________________
0.018 0.0279 0.0216 1.29
0.019 0.0212 0.0195 1.08
0.020 0.0145 0.0174 0.83
______________________________________ wherein W and F are in pounds and W/F is dimensionless.
References Cited (Backward Citations)
US3848722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |