Patent EP0189852A2 successfully refreshed from Google Patents.
EP0189852A2
Expired / Lapsed
EP
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Home position detecting apparatus for use in printing apparatus having print wheel
Assignee: Toshiba Tec Corp
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Filing: 1986-01-23
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Granted: —
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Expires: 2006-01-23
Abstract
Abstract O A home position detecting apparatus includes a detector (28, 29) to generate a detection signal when the home position of a print wheel (17) is detected and a stepping motor (24) to rotate the print wheel (17) in response to a drive signal. This home position detecting apparatus further includes a control circuit (31, 39) which gives the drive signal having the special phase to the stepping motor (24) in response to the detection signal from the detector (28, 29).
Inventors
- 👤 Makoto Takahashi
- 👤 Akira Nuita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:45
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/22; B41J1/32; B41J1/34; B41J1/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A home position detecting apparatus comprising detecting means (28, 29) for generating a detection signal when a home position of a print wheel (17) is detected and a stepping motor (24) for rotating said print wheel (17) in response to a drive signal, characterized by further comprising a control circuit (31, 39) for giving the drive signal having a specified phase to said stepping motor (24) in response to the detection signal from said detecting means (28, 29).
Claim 2
Dependent Claim
78 words
A home position detecting apparatus comprising detecting means (28, 29) for generating a detection signal when a home position of a print wheel (17) is detected and a stepping motor (24) for rotating said print wheel (17) in response to a drive signal, characterized by further comprising a control circuit (31, 39) for giving the drive signal having a specified phase to said stepping motor (24) in response to the detection signal from said detecting means (28, 29).
Claim 3
Dependent Claim
62 words
A home position detecting apparatus according to claim 1, characterized in that said print wheel (17) has a detecting hole (21) at the home position, and said detecting means includes a light emitting element (28) and a photoelectric element (29) arranged to face each other such that said print wheel (17) is interposed therebetween in order to detect said detecting hole (21).
Claim 4
Dependent Claim
100 words
A home position detecting apparatus according to claim 1 or 2, characterized in that said control circuit includes a logic circuit (39) for generating drive signal components A, A, B, and B whose levels are converted in accordance with a predetermined sequence in response to an input pulse, and a control unit (31) which gives a clear signal to said logic circuit (39) in response to the detection signal from said detecting means (28, 29) and thereby allowing the logic circuit (39) to generate said drive signal components A, A, B, and B which were set at predetermined levels, respectively.
References Cited (Backward Citations)
No citation records indexed.
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