US3557693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Type carrier for printers and the like
Assignee: Siemens AG
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Filing: 1968-09-26
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Granted: 1971-01-26
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Expires: 1988-09-26
Abstract
Abstract Type carrier for rapid printers in which the type turns about two parallel spaced direction changing sprockets, one of which is a drive sprocket. The type carriers are guided in end-to-end relation with respect to each other between a pair of parallel spaced guide plates having aligned parallel straight guides therein generally tangential of the direction changing sprockets for guiding the type in a continuous path about the sprockets including a front straight line guide section. The type carriers have type on their front faces and have drive pins extending from one side thereof meshing with the teeth of the direction changing sprockets and movable along guide slots in the straight portions of the guide plates. Guide pins extend from the opposite sides of the type carriers and are guided for movement along straight guide slots in the opposite guide plates, which slots conform to the path of travel of the type carriers. The type carriers are guided for movement along the slots and are retained from outward movement due to centrifugal forces by at least one retainer belt extending along the outsides of the drive pins and the peripheral portions of the teeth of the direction changing sprockets to take up play between the type carriers and the sprockets.
Inventors
- 👤 Hermann Kuchenbecker
- 👤 Ludwig Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:09
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
204 words
In a type carrier installation particularly adapted for rapid printers: a frame; a series of type carriers in mutual engagement with each other guided in said frame for movement in a plane perpendicular to the plane of movement of the printing hammers; a drive sprocket rotatably mounted in said frame; an idler sprocket spaced from said drive sprocket, said drive and idler sprockets having uniformly spaced sprocket teeth; two parallel rectilinear guides connecting said drive sprocket with said idler sprocket along the incoming and outgoing sides thereof and generally tangentially of the bases of said sprocket teeth; semicircular guides extending partially about said drive sprocket and said idler sprocket and connecting the incoming ends of the rectilinear guides with the outgoing ends thereof; spaced drive pins extending laterally from each of said type carriers for engagement with the teeth of said drive and idler sprockets; and at least one endless belt engaging the outer sides of said drive pins of said type carriers and supporting the type carriers to the outsides of the peripheries of the sprockets and maintaining said drive pins in engagement with the teeth of said sprockets and in engagement with each other along engagement lines running in a thrust direction.
Claim 2
Dependent Claim
204 words
In a type carrier installation particularly adapted for rapid printers: a frame; a series of type carriers in mutual engagement with each other guided in said frame for movement in a plane perpendicular to the plane of movement of the printing hammers; a drive sprocket rotatably mounted in said frame; an idler sprocket spaced from said drive sprocket, said drive and idler sprockets having uniformly spaced sprocket teeth; two parallel rectilinear guides connecting said drive sprocket with said idler sprocket along the incoming and outgoing sides thereof and generally tangentially of the bases of said sprocket teeth; semicircular guides extending partially about said drive sprocket and said idler sprocket and connecting the incoming ends of the rectilinear guides with the outgoing ends thereof; spaced drive pins extending laterally from each of said type carriers for engagement with the teeth of said drive and idler sprockets; and at least one endless belt engaging the outer sides of said drive pins of said type carriers and supporting the type carriers to the outsides of the peripheries of the sprockets and maintaining said drive pins in engagement with the teeth of said sprockets and in engagement with each other along engagement lines running in a thrust direction.
Claim 3
Dependent Claim
46 words
The type carrier installation of claim 1, wherein annuLar flanges extend about said sprockets, along one side thereof in registry with and extending radially outwardly of the teeth of said sprockets, and wherein said retainer belts are interposed between said type carriers and said annular flanges.
Claim 4
Dependent Claim
47 words
The type carrier installation of claim 1, wherein the rectilinear guides comprise front and back guides, wherein pressure hammers face said front guides, and wherein at least one tension idler has tensioning engagement with said retainer belt in outwardly spaced relation with respect to the back guide.
Claim 5
Dependent Claim
75 words
The type carrier installation of claim 3, wherein idlers are provided on opposite sides of said tension idler at the outgoing side of one sprocket and the incoming side of the next sprocket and have guiding engagement with the outer sides of said retainer belt to guide said belt as passing from the outgoing side of one sprocket to said tension idler and from said tension idler to the incoming side of the other sprocket.
Claim 6
Dependent Claim
26 words
A type carrier installation in accordance with claim 2, wherein said drive pins have rollers rotatably mounted thereon engageable in the spaces between said sprocket teeth.
Claim 7
Dependent Claim
67 words
A type carrier installation in accordance with claim 1, wherein drive pins extend from opposite sides of said type carriers, and are spaces apart to mesh in the space between the teeth of said sprockets, and wherein retainer belts extend along opposite sides of said type carriers into engagement with said drive pins to retain said type carriers from radial outward play with respect to said sprockets.
Claim 8
Dependent Claim
60 words
A type carrier installation in accordance with claim 6, wherein said drive and idler sprockets each have an outwardly opening circumferential recess therein intermediate the sides thereof, and wherein the type carriers move into said recess and accommodate said retainer belts to position and retain said drive pins in engagement with said sprocket teeth on opposite sides of said recess.
Claim 9
Dependent Claim
42 words
A type carrier installation in accordance with claim 1, wherein individual retainer belts are provided for each sprocket, and wherein means are provided wrapping said retainer belts about said sprockets to retain said drive pins to said sprockets for at least 180*.
Claim 10
Dependent Claim
45 words
A type carrier installation in accordance with claim 8, wherein the means wrapping said retainer belts about said sprockets comprise wrapping idlers disposed adjacent the incoming and outgoing sides of said sprockets, and tension idlers spaced outwardly of said sprockets and between said wrapping idlers.
References Cited (Backward Citations)
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US3435756A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |