US4443124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer with electromagnetically driven hammer
Assignee: Canon Inc
•
Filing: 1983-07-15
•
Granted: 1984-04-17
•
Expires: 2003-07-15
Abstract
Abstract A printer provided with an electrically operable printing hammer and an ink ribbon feeding mechanism. The number of components necessary for such type of printer is substantially reduced by using a single and common driving source to operate both of the printing hammer and ribbon feeding mechanism.
Inventors
- 👤 Toshiaki Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:51
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/38; B41J33/388
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A printer, comprising: a lever arrangement for feeding an ink ribbon; means connected to said lever arrangement for driving said lever arrangement to feed the ink ribbon, said means including a magnet, a coil associated with said magnet and adapted to receive electric voltage from a voltage source, and a reciprocating member operable by said magnet and said coil when said coil receives voltage, wherein one end of said member operates as a hammer to hit a type to effect a print on a recording medium with the ink ribbon when said member is moved in a print direction, and the other end thereof effects a driving operation of the ink ribbon by said lever arrangement when said member is moved in the opposite direction; and a spring connected to said lever arrangement for retaining said member in a predetermined position when electric voltage is not applied to said coil.
Claim 2
Dependent Claim
150 words
A printer, comprising: a lever arrangement for feeding an ink ribbon; means connected to said lever arrangement for driving said lever arrangement to feed the ink ribbon, said means including a magnet, a coil associated with said magnet and adapted to receive electric voltage from a voltage source, and a reciprocating member operable by said magnet and said coil when said coil receives voltage, wherein one end of said member operates as a hammer to hit a type to effect a print on a recording medium with the ink ribbon when said member is moved in a print direction, and the other end thereof effects a driving operation of the ink ribbon by said lever arrangement when said member is moved in the opposite direction; and a spring connected to said lever arrangement for retaining said member in a predetermined position when electric voltage is not applied to said coil.
Claim 3
Dependent Claim
36 words
A printer according to claim 1, wherein said magnet is a permanent magnet and said member includes said coil, said permanent magnet being disposed about said member and said coil being disposed about said permanent magnet.
Claim 4
Dependent Claim
16 words
A printer according to claim 1, wherein said spring biases said member in the print direction.
Claim 5
Dependent Claim
30 words
A printer according to claim 1, further comprising a character wheel provided with a plurality of types, said plurality of types being hit by said one end of the member.
Claim 6
Dependent Claim
12 words
A printer according to claim 1, wherein said member includes said coil.
Claim 7
Dependent Claim
19 words
A printer according to claim 1, wherein said magnet is a permanent magnet which is positioned about said member.
Claim 8
Dependent Claim
29 words
A printer according to claim 1, further comprising: a feeding roller having a ratchet for feeding said ink ribbon, said feeding roller by said ratchet engages said lever arrangement.
Claim 9
Dependent Claim
19 words
A printer according to claim 5 wherein said magnet is a permanent magnet which is positioned about said member.
References Cited (Backward Citations)
US2044072A
Cited
US3063539A
Cited
US3404628A
Cited
US3386378A
Cited
US3603442A
Cited
US4030591A
Cited
US3810195A
Cited
US4036349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |