Patent US4172671A successfully refreshed from Google Patents.
US4172671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed printer having a pneumatically actuated printing head
Assignee: Facit AB
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Filing: 1977-12-02
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Granted: 1979-10-30
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Expires: 1997-12-02
Abstract
Abstract A high speed printing device having a printing head provided with printing needles. The printing device is mounted on a movable carriage which is adapted to move adjacent to a recording medium. The printing head is pneumatically operated and also is movable relative to the carriage so that the distance between the printing needles and the recording medium is variable.
Inventors
- 👤 Sven G. V. Stenudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:14
CPC Classifications
B; B41; B41J; B41J23/00; B41J23/20; B41J23/26; B41J25/00; B41J25/304; B41J25/308
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
In a high speed printer having a printing head provided with a plurality of printing needles, a movable carriage, means mounting said printing head on said carriage, said carriage being arranged to move adjacent to and along an axis parallel to the axis of a recording medium, said printing head also being movable relative to recording medium whereby the distance between said printing head and recording medium is variable, the improvement comprising means including an expandable bladder for changing the distance between said printing head and said recording medium, an air supply for said bladder means, means for compressing said bladder means, and an electromagnet which when operative controls said compression means to determine the compression of said bladder means.
Claim 2
Dependent Claim
120 words
In a high speed printer having a printing head provided with a plurality of printing needles, a movable carriage, means mounting said printing head on said carriage, said carriage being arranged to move adjacent to and along an axis parallel to the axis of a recording medium, said printing head also being movable relative to recording medium whereby the distance between said printing head and recording medium is variable, the improvement comprising means including an expandable bladder for changing the distance between said printing head and said recording medium, an air supply for said bladder means, means for compressing said bladder means, and an electromagnet which when operative controls said compression means to determine the compression of said bladder means.
Claim 3
Dependent Claim
46 words
A high speed printer as claimed in claim 1 wherein said bladder means constitutes a first expandable bladder acting upon said printing head, a second expandable bladder, an air hose connecting said first and second bladder, and a printer frame having said second bladder fixed thereon.
Claim 4
Dependent Claim
34 words
A high speed printer as claimed in claim 2 wherein said compression means includes a disc secured to the armature of said electromagnet, said disc being positioned and arranged to press said second bladder.
Claim 5
Dependent Claim
33 words
A high speed printer as claimed in claim 3 wherein said second bladder is provided with an opening communicating with the atmosphere, said opening being closed when said disc compresses said second bladder.
Claim 6
Dependent Claim
47 words
A high speed printer as claimed in claim 2 wherein means is provided for pivoting said printing head on said carriage, said first bladder is arranged between said carriage and printing head whereby upon expansion thereof causes said printing head to pivotally move toward said recording medium.
Claim 7
Dependent Claim
51 words
A high speed printer as claimed in claim 5 further comprising a sensing means mounted on said printing head, said sensing means coacts with said recording medium to stop the movement of said printing head toward said recording medium when a predetermined distance remains between said medium and said printing needles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |