US4189078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper tractor locking apparatus
Assignee: Unisys Corp
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Filing: 1978-03-17
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Granted: 1980-02-19
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Expires: 1998-03-17
Abstract
Abstract A mechanism is provided for securing a paper driving tractor device along a relatively thin elongate member effective in the released condition to permit the tractor to be positioned at will along said elongate member while in the locked condition enabling, positive, secured, engagement of the tractor with said elongate member effective to prevent any movement of the tractor relative to said member, also permitting locking an elongate member repeatedly at the same position without affecting the original characteristics of the elongate member.
Inventors
- 👤 Albert S. Spisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
B; B65; B65H; B65H20/00; B65H20/20; B65H20/22; B41; B41J; B41J11/00; B41J11/26; B41J11/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A locking mechanism for securing paper driving apparatus to a semi-rigid positioning member comprising: driving means for moving prepunched, edge perforated material along a fixed path; means for adjustably positioning the driving means to engage the edge perforated material; means for radially deforming a portion of the semi-rigid positioning member in an outward direction to lock the driving means in and release it from a desired location; and means for accommodating semi-rigid positioning members of various diameters.
Claim 2
Dependent Claim
77 words
A locking mechanism for securing paper driving apparatus to a semi-rigid positioning member comprising: driving means for moving prepunched, edge perforated material along a fixed path; means for adjustably positioning the driving means to engage the edge perforated material; means for radially deforming a portion of the semi-rigid positioning member in an outward direction to lock the driving means in and release it from a desired location; and means for accommodating semi-rigid positioning members of various diameters.
Claim 3
Dependent Claim
69 words
The invention claimed in claim 1, wherein the means for radially deforming a portion of the semi-rigid positioning member in an outward direction comprises: a pivotal, elongated, rigid lever having a radial end portion; a follower engageable by the radial end portion of the pivotal, elongated, rigid lever; and a plunger member integral with the follower and slideable in response to the movement of the pivotal, elongated, rigid lever.
Claim 4
Dependent Claim
25 words
The invention claimed in claim 2, wherein the follower includes means for biasing the follower into a nonengaging condition relative to the semi-rigid positioning member.
Claim 5
Dependent Claim
74 words
The invention claimed in claim 3, wherein the means for accommodating semi-rigid positioning members of various diameters comprises: a hollow cylindrical member having a smooth axial bore; a cylindrical opening, extending normal to the smooth axial bore, into which the plunger member is slideable; and eccentric means for adjusting the slideable distance of the plunger member by varying the degree to which the pivotal, elongated, rigid lever engages the follower of the plunger member.
Claim 6
Dependent Claim
51 words
The invention claimed in claim 4, wherein the plunger member is slideable to radially deform a portion of the semi-rigid positioning member in an outward direction into the cylindrical opening extending normal to the smooth axial bore and lock the driving means at a desired location along the semi-rigid positioning member.
Claim 7
Dependent Claim
22 words
The invention claimed in claim 2, wherein the pivotal, elongated, rigid lever is rotatable from a locking position to a releasing position.
References Cited (Backward Citations)
US3317102A
Cited
US3693856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |