US3874287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing machines
Assignee: Bull SAS
•
Filing: 1973-06-05
•
Granted: 1975-04-01
•
Expires: 1993-06-05
Abstract
Abstract A printing machine is provided comprising a character support that passes in front of a print medium, a striking block with N striking elements which each include a print hammer, elastic means for supplying the striking force for the hammer, a device which keeps the hammer under tension and releases it at the instant of the strike, means for arming the hammer and means for damping the hammer. The damping means comprises N tongues each disposed on a support coated with a layer of material having a strong damping power, each tongue being associated with a striking element.
Inventors
- 👤 Jacques Aldea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/42
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
227 words
A printing machine comprising a character support carrying a number of printing characters and a plurality of striking hammers between which is adapted to pass a printing medium, means for resiliently mounting said striking hammers for movement toward and away from said printing characters, means for deflecting said resilient mounting means for arming said striking hammers for movement toward said printing characters, means for selectively holding and releasing said armed striking hammers whereby upon the release thereof said striking hammers move toward said printing characters and rebound therefrom, means for damping said striking hammers during the rebound movement thereof in a direction away from said printing characters, said damping means being supported by a beam spanning said striking hammers, said damping means being defined by a plurality of tongues each tongue being associated with one of said striking hammers, said arming means including a carriage carrying said resilient mounting means, said arming means further including means for moving said carriage toward said printing characters for deflecting said resilient mounting means whereby said striking hammers are armed, and means responsive to said last-mentioned movement of said carriage for moving said beam and the damping tongues carried thereby toward said striking hammers generally simultaneously with the movement of said carriage toward said printing characters thereby to position said tongues to intercept the striking hammers during the rebound movement thereof.
Claim 2
Dependent Claim
227 words
A printing machine comprising a character support carrying a number of printing characters and a plurality of striking hammers between which is adapted to pass a printing medium, means for resiliently mounting said striking hammers for movement toward and away from said printing characters, means for deflecting said resilient mounting means for arming said striking hammers for movement toward said printing characters, means for selectively holding and releasing said armed striking hammers whereby upon the release thereof said striking hammers move toward said printing characters and rebound therefrom, means for damping said striking hammers during the rebound movement thereof in a direction away from said printing characters, said damping means being supported by a beam spanning said striking hammers, said damping means being defined by a plurality of tongues each tongue being associated with one of said striking hammers, said arming means including a carriage carrying said resilient mounting means, said arming means further including means for moving said carriage toward said printing characters for deflecting said resilient mounting means whereby said striking hammers are armed, and means responsive to said last-mentioned movement of said carriage for moving said beam and the damping tongues carried thereby toward said striking hammers generally simultaneously with the movement of said carriage toward said printing characters thereby to position said tongues to intercept the striking hammers during the rebound movement thereof.
Claim 3
Dependent Claim
27 words
The printing machine as defined in claim 1 wherein said damping means includes a layer of high damping power material sandwiched between said beam and said tongues.
Claim 4
Dependent Claim
18 words
The printing machine as defined in claim 1 wherein said tongues are constructed from high damping power material.
Claim 5
Dependent Claim
58 words
The printing machine as defined in claim 1 including means for mounting said beam for pivotal motion toward and away from said striking hammers, and said responsive means includes connection means between said beam mounting means and said carriage whereby said beam and the damping tongues carried thereby are moved generally simultaneously with the movement of said carriage.
Claim 6
Dependent Claim
49 words
The printing machine as defined in claim 1 including means for resiliently biasing said carriage for movement in a direction away from said striking hammers whereby return movement of said carriage away from said printing characters after a printing operation is achieved under the influence of said biasing means.
Claim 7
Dependent Claim
49 words
The printing machine as defined in claim 1 wherein said beam and the damping tongues carried thereby are disposed a predetermined distance from said printing characters in the armed condition of said striking hammers with said damping tongues each being in overlying deflected engagement with an associated striking hammer.
Claim 8
Dependent Claim
68 words
The printing machine as defined in claim 1 wherein said beam and the damping tongues carried thereby are disposed a predetermined distance from said printing characters in the armed condition of said striking hammers with said damping tongues each being in overlying deflected engagement with an associated striking hammer, and said beam and damping tongues are disposed at an acute angle to the horizontal in said armed condition.
Claim 9
Dependent Claim
91 words
The printing machine as defined in claim 1 wherein said beam and the damping tongues carried thereby are disposed a predetermined distance from said printing characters in the armed condition of said striking hammers with said damping tongues each being in overlying deflected engagement with an associated striking hammer, and upon release of selected ones of said striking hammers by said selectively holding and releasing means the associated damping tongues resume their normal undeflecteD condition in line to intercept the selected ones of said striking hammers during the rebound movement thereof.
Claim 10
Dependent Claim
23 words
The printing machine as defined in claim 1 wherein said means for moving said carriage toward said printing characters include rotatable cam means.
Claim 11
Dependent Claim
18 words
The printing machine as defined in claim 2 wherein said tongues are constructed from high damping power material.
Claim 12
Dependent Claim
65 words
The printing machine as defined in claim 4 wherein said machine includes a frame said beam mounting means include a pair of levers, means connecting a first end of each lever to said beam, means pivotally connecting a second end of each lever to said frame, and said connection means connects said carriage to said pair of levers between the first and second ends thereof.
Claim 13
Dependent Claim
49 words
The printing machine as defined in claim 4 including means for resiliently biasing said carriage for movement in a direction away from said striking hammers whereby return movement of said carriage away from said printing characters after a printing operation is achieved under the influence of said biasing means.
Claim 14
Dependent Claim
49 words
The printing machine as defined in claim 11 including means for resiliently biasing said carriage for movement in a direction away from said striking hammers whereby return movement of said carriage away from said printing characters after a printing operation is achieved under the influence of said biasing means.
Claim 15
Dependent Claim
68 words
The printing machine as defined in claim 11 wherein said beam and the damping tongues carried thereby are disposed a predetermined distance from said printing characters in the armed condition of said striking hammers with said damping tongues each being in overlying deflected engagement with an associated striking hammer, and said beam and damping tongues are disposed at an acute angle to the horizontal in said armed condition.
Claim 16
Dependent Claim
23 words
The printing machine as defined in claim 11 wherein said means for moving said carriage toward said printing characters include rotatable cam means.
References Cited (Backward Citations)
US3155033A
Cited
US3228325A
Cited
US3359921A
Cited
US3630142A
Cited
US3636868A
Cited
US3673955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |