Patent US3380581A successfully refreshed from Google Patents.
US3380581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon spool mounting bracket
Assignee: Individual
•
Filing: 1964-12-15
•
Granted: 1968-04-30
•
Expires: 1984-12-15
Abstract
No abstract record available.
Inventors
- 👤 Walter D Landgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:28
CPC Classifications
B; B41; B41J; B41J33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A BRACKET HOLDING A PAIR OF IDENTICAL RIBBON SPOOLS IN FIXED JUSTAPOSED RELATION, EACH SPOOL HAVING AN AXIAL HOLE FOR MOUNTING THE SPOOL IN A TYPEWRITER RIBBON WELL, SAID BRACKET CONSISTING OF A FLAT ELONGATED PORTION HAVING A PAIR OF PINS PROJECTING FROM A COMMON SURFACE THEREOF, THE PINS BEING SPACED BY A DISTANCE AT LEAST EQUAL TO THE DIAMETER OF ONE OF SAID SPOOLS, EACH PIN HAVING A SLOT EXTENDING LONGITUDINALLY FROM THE FREE END THEREOF TOWARD SAID COMMON SURFACE AND HAVING A DIAMETER SUFFICIENTLY GREAT TO PROVIDE A RESILIENT FORCE FIT WITH THE INTERIOR OF SAID AXIAL HOLE, SAID SLOTS EXTENDING TRANSVERSELY ENTIRELY THROUGH SAID PINS, THE LENGTHS OF SAID PINS BEING SUFFICIENTLY GREAT TO FRICTIONALLY ENGAGE SAID AXIAL HOLES WHEN INSERTED THEREIN, WHEREBY UPON INSERTION OF EACH PIN IN THE AXIAL HOLE OF A SPOOL THE PIN IS COMPRESSED SLIGHTLY IN A DIRECTION NORMAL TO ITS LONGITUDINAL AXIS AND THEREBY GRIPS SAID SPOOL IN RELEASABLE ENGAGEMENT.
Claim 2
Dependent Claim
159 words
A BRACKET HOLDING A PAIR OF IDENTICAL RIBBON SPOOLS IN FIXED JUSTAPOSED RELATION, EACH SPOOL HAVING AN AXIAL HOLE FOR MOUNTING THE SPOOL IN A TYPEWRITER RIBBON WELL, SAID BRACKET CONSISTING OF A FLAT ELONGATED PORTION HAVING A PAIR OF PINS PROJECTING FROM A COMMON SURFACE THEREOF, THE PINS BEING SPACED BY A DISTANCE AT LEAST EQUAL TO THE DIAMETER OF ONE OF SAID SPOOLS, EACH PIN HAVING A SLOT EXTENDING LONGITUDINALLY FROM THE FREE END THEREOF TOWARD SAID COMMON SURFACE AND HAVING A DIAMETER SUFFICIENTLY GREAT TO PROVIDE A RESILIENT FORCE FIT WITH THE INTERIOR OF SAID AXIAL HOLE, SAID SLOTS EXTENDING TRANSVERSELY ENTIRELY THROUGH SAID PINS, THE LENGTHS OF SAID PINS BEING SUFFICIENTLY GREAT TO FRICTIONALLY ENGAGE SAID AXIAL HOLES WHEN INSERTED THEREIN, WHEREBY UPON INSERTION OF EACH PIN IN THE AXIAL HOLE OF A SPOOL THE PIN IS COMPRESSED SLIGHTLY IN A DIRECTION NORMAL TO ITS LONGITUDINAL AXIS AND THEREBY GRIPS SAID SPOOL IN RELEASABLE ENGAGEMENT.
References Cited (Backward Citations)
US1488123A
Cited
GB735437A
Cited
US2873025A
Cited
US3051537A
Cited
US2944761A
Cited
US3106759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |