JPS5593479A - Paper jam detector - Google Patents

Paper jam detector

Info

Publication number
JPS5593479A
JPS5593479A JP144279A JP144279A JPS5593479A JP S5593479 A JPS5593479 A JP S5593479A JP 144279 A JP144279 A JP 144279A JP 144279 A JP144279 A JP 144279A JP S5593479 A JPS5593479 A JP S5593479A
Authority
JP
Japan
Prior art keywords
signal
detecting signal
paper feed
feed
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP144279A
Other languages
Japanese (ja)
Inventor
Takashi Akiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP144279A priority Critical patent/JPS5593479A/en
Publication of JPS5593479A publication Critical patent/JPS5593479A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/46—Applications of alarms, e.g. responsive to approach of end of line
    • B41J29/48—Applications of alarms, e.g. responsive to approach of end of line responsive to breakage or exhaustion of paper or approach of bottom of paper

Abstract

PURPOSE:To ensure to detect a jam by a method wherein a relationship between the signal of a hole detector provided for the passage of a recording paper feed hole and the paper feed signal is measured. CONSTITUTION:Paper feed tractors 2, 3 are driven synchronously with a pulse motor 4. A feed detector 5 is disposed close to a finish terminal of the paper feed tractor 2. A flip flop 11 is set with the command signal 21 of the pulse motor 4, that is reset by the feed hole detecting signal of the feed detector 5. Normally the detecting signal 22 delays to the extent of a constant time T, and the value of a counter 13 may not exceed a given value N. Whenever a paper is not fed properly, the command signal 21 enters into the flip flop 11, where the detecting signal 22 may not enter into the flip flop 11 even if the time T has elapsed. Accordingly, the detecting signal is delayed, causing the counter 13 not to be reset within a permissible time and the value of the counter 13 exceeds N value resulting in giving a jam detecting signal.
JP144279A 1979-01-09 1979-01-09 Paper jam detector Pending JPS5593479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP144279A JPS5593479A (en) 1979-01-09 1979-01-09 Paper jam detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP144279A JPS5593479A (en) 1979-01-09 1979-01-09 Paper jam detector

Publications (1)

Publication Number Publication Date
JPS5593479A true JPS5593479A (en) 1980-07-15

Family

ID=11501548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP144279A Pending JPS5593479A (en) 1979-01-09 1979-01-09 Paper jam detector

Country Status (1)

Country Link
JP (1) JPS5593479A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58194058U (en) * 1982-06-22 1983-12-23 セイコーインスツルメンツ株式会社 Printer paper jam detection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023933A (en) * 1973-06-26 1975-03-14
JPS519915A (en) * 1974-04-04 1976-01-27 Data Products Corp Insatsusochi

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023933A (en) * 1973-06-26 1975-03-14
JPS519915A (en) * 1974-04-04 1976-01-27 Data Products Corp Insatsusochi

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58194058U (en) * 1982-06-22 1983-12-23 セイコーインスツルメンツ株式会社 Printer paper jam detection device

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