Patent US4637691A successfully refreshed from Google Patents.
Patent US3807544A successfully refreshed from Google Patents.
US3807544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal ribbon spool having a magnetic adapter with a rupturable diaphragm
Assignee: Individual
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Filing: 1972-07-24
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Granted: 1974-04-30
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Expires: 1992-07-24
Abstract
Abstract There is disclosed a typewriter ribbon spool comprising a spool for receiving a spirally wound inked ribbon and an adapter received by the spool for accommodating typewriter spindles of different diameter. The adapter comprises a hub having a central passageway for receiving the typewriter spindle and a rupturable diaphragm spanning the passageway. Upon insertion of the typewriter spindle into the passageway, the diaphragm is ruptured in accordance with the size of the spindle and acts to center the spool on the spindle. The adapter hub is magnetized.
Inventors
- 👤 W Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:34
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
An adapter for an inked ribbon spool comprising a hub having a passage extending along a central axis of the hub, at least one diahragm spanning the passage for rupturably receiving spindles of different diameter, and means for cooperative engagement with an inked ribbon spool for rotating the spool.
Claim 2
Dependent Claim
49 words
An adapter for an inked ribbon spool comprising a hub having a passage extending along a central axis of the hub, at least one diahragm spanning the passage for rupturably receiving spindles of different diameter, and means for cooperative engagement with an inked ribbon spool for rotating the spool.
Claim 3
Dependent Claim
18 words
The adapter of claim 1 wherein said one diaphragm divides the passage into a plurality of blind sub-passages.
Claim 4
Dependent Claim
31 words
The adapter of claim 2 further comprising another diaphragm spanning the passage at a location spaced from said one diaphragm, the diaphragms dividing the passage into at least three blind sub-passages.
Claim 5
Dependent Claim
12 words
The adapter of claim 3 wherein the blind sub-passages include coaxial portions.
Claim 6
Dependent Claim
28 words
The adapter of claim 3 wherein two of the blind sub-passages extend in the same direction as the hub axis and the remaining blind sub-passage is transverse thereto.
Claim 7
Dependent Claim
14 words
The adapter of claim 1 wherein said one diaphragm is of substantially constant thickness.
Claim 8
Dependent Claim
30 words
The adapter of claim 1 wherein said one diaphragm is of a predetermined thickness adjacent the central axis of the hub and increases in thickness at locations radially spaced therefrom.
Claim 9
Dependent Claim
14 words
The adapter of claim 1 wherein the hub is made of a magnetized material.
Claim 10
Dependent Claim
11 words
The adapter of claim 1 wherein said one diaphragm is imperforate.
Claim 11
Dependent Claim
84 words
An inked ribbon spool comprising a core and flanges extending radially away therefrom and defining therewith a ribbon receiving area; and an adapter for connecting the spool to typewriter ribbon wells having spindles of different diameter, comprising a hub in driving engagement with the spool and providing a passage extending along a central axis of the spool, at least one diaphragm spanning the passage for rupturably receiving spindles of different diameter, and means for cooperative engagement with the ribbon well for rotating the hub.
Claim 12
Dependent Claim
84 words
An inked ribbon spool comprising a core and flanges extending radially away therefrom and defining therewith a ribbon receiving area; and an adapter for connecting the spool to typewriter ribbon wells having spindles of different diameter, comprising a hub in driving engagement with the spool and providing a passage extending along a central axis of the spool, at least one diaphragm spanning the passage for rupturably receiving spindles of different diameter, and means for cooperative engagement with the ribbon well for rotating the hub.
Claim 13
Dependent Claim
18 words
The spool of claim 10 wherein said one diaphragm divides the passage into a plurality of blind sub-passages.
Claim 14
Dependent Claim
31 words
The spool of claim 11 further comprising another diaphragm spanning the passage at a location spaced from said one diaphragm, the diaphragms dividing the passage into at least three blind sub-passages.
Claim 15
Dependent Claim
33 words
The spool of claim 10 further comprising means assisting said one diaphragm in preventing lateral movement between the spool and the ribbon well, the assisting means comprising magnetized material carried by the hub.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |