US3690249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Type wheel setting and re-setting means in selective bed and platen printing machines
Assignee: Citizen Watch Co Ltd
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Filing: 1970-04-24
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Granted: 1972-09-12
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Expires: 1990-04-24
Abstract
Abstract A high speed printing apparatus in which a plurality of type wheels each having a helical spring disposed therein are rotatably mounted on a shaft in side-by-side relation, with one end of the helical spring anchored to the type wheel and the other end thereof anchored to an operation bar to bias the type wheel in one direction, and the type wheels are rotated all at once by rotating the operation bar and stopped by respective associated selection members when the type faces to be printed of the respective type wheels are located in the printing position.
Inventors
- 👤 Shohachi Nihira
- 👤 Yasuo Okawara
- 👤 Takehisa Naito
- 👤 Mikio Moriya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/48; B41J1/00; B41J1/22; B41J1/32; B41J1/44; B41J1/46; B41J1/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
211 words
A high speed printing apparatus comprising a plurality of type wheels arranged side by side in the longitudinal direction of a platen and rotatably mounted on a drive shaft, a plurality of helical springs, each of said type wheels having a ratchet portion and having the inner end of one of said helical springs attached thereto, each of said type wheels having a slot therein, an operation bar extending through said slots, said operation bar being attached to said drive shaft for rotation with said drive shaft, a plurality of electro-magnets, a plurality of selection members arranged respectively for engagement with each of said type wheel ratchet portions and operated respectively by one of said electromagnets, each of said helical springs having its outer end attached to said operation bar to hold its associated type wheel in engagement with said operation bar under the biasing force thereof, means for rotating said drive shaft and attached operation bar to concurrently rotate the type wheels in engagement with said operation bar, and means for selectively energizing said electromagnets to bring said selection members into engagement with said ratchet portions of said type wheels thereby to hold said type wheels against rotation whereby particular type faces of said type wheels are selected for printing.
Claim 2
Dependent Claim
211 words
A high speed printing apparatus comprising a plurality of type wheels arranged side by side in the longitudinal direction of a platen and rotatably mounted on a drive shaft, a plurality of helical springs, each of said type wheels having a ratchet portion and having the inner end of one of said helical springs attached thereto, each of said type wheels having a slot therein, an operation bar extending through said slots, said operation bar being attached to said drive shaft for rotation with said drive shaft, a plurality of electro-magnets, a plurality of selection members arranged respectively for engagement with each of said type wheel ratchet portions and operated respectively by one of said electromagnets, each of said helical springs having its outer end attached to said operation bar to hold its associated type wheel in engagement with said operation bar under the biasing force thereof, means for rotating said drive shaft and attached operation bar to concurrently rotate the type wheels in engagement with said operation bar, and means for selectively energizing said electromagnets to bring said selection members into engagement with said ratchet portions of said type wheels thereby to hold said type wheels against rotation whereby particular type faces of said type wheels are selected for printing.
Claim 3
Dependent Claim
66 words
The high speed printing apparatus of claim 1 including a plurality of clear members positioned for engagement with each of said selection members, and a clear cam fixedly mounted on said drive shaft for selectively operating said clear members, said clear members being operative to clear said selection members from their type wheel selecting positions when said clear members are operated by said clear cams respectively.
Claim 4
Dependent Claim
189 words
The high speed printing apparatus as defined in claim 1, wherein the valleys of the teeth in said ratchet portions corresponding to decimal points are made deeper than the valleys of the ratchet teeth corresponding to numerals whereby the amounts of displacement of said selection members, upon engagement with their associated type wheels, differs when a selection member selects a numeral for printing and when a selection member selects a decimal point for printing, a plurality of selection member discrimination levers positioned for engagement respectively with each of said selection members to form a bridge configuration wherein the selection member discrimination lever of a higher digital position may restrain the selection member discrimination lever of a lower digital position, said selection members and discrimination levers being so constructed tHat when a selection member engages a ratchet tooth corresponding to a numeral, said selection member may engage the associated selection member discrimination lever, whereas when said selection member engages a ratchet tooth corresponding to a decimal point, said selection member may engage the selection member discrimination lever of the next higher digital position, whereby effective zeros are discriminated and printed.
Claim 5
Dependent Claim
58 words
The high speed printing apparatus of claim 3 wherein each of said type wheels includes type faces corresponding to numerals and a type face corresponding to a decimal point, the tooth, in the ratchet portion of each type wheel, corresponding to aid decimal point having a deeper valley than the teeth, in said ratchet portion, corresponding to numerals.
Claim 6
Dependent Claim
57 words
The high speed printing apparatus of claim 3 wherein said type wheels include type wheels having numeral type faces only and further type wheels having decimal point type faces only, the valley of the ratchet teeth of the decimal point type wheels being made deeper than the valley of the ratchet teeth of the numeral type wheels.
Claim 7
Dependent Claim
42 words
The high speed printing apparatus of claim 1, including a plurality of reversing levers positioned for engagement respectively with each of said selection members, each of said reversing levers being operated by an electro-magnet to operate the selection members in engagement therewith.
References Cited (Backward Citations)
US2576041A
Cited
US2766687A
Cited
US3139819A
Cited
US3269510A
Cited
US3307676A
Cited
US3422754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |