EP0631879A2 - Druckgerät mit Papierdetektor - Google Patents

Druckgerät mit Papierdetektor Download PDF

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Publication number
EP0631879A2
EP0631879A2 EP94110030A EP94110030A EP0631879A2 EP 0631879 A2 EP0631879 A2 EP 0631879A2 EP 94110030 A EP94110030 A EP 94110030A EP 94110030 A EP94110030 A EP 94110030A EP 0631879 A2 EP0631879 A2 EP 0631879A2
Authority
EP
European Patent Office
Prior art keywords
recording paper
thermal head
printing apparatus
existence
sensor
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.)
Withdrawn
Application number
EP94110030A
Other languages
English (en)
French (fr)
Other versions
EP0631879A3 (de
Inventor
Hideki C/O Seiko Instruments Inc. Onuki
Katsuari C/O Seiko Instruments Inc. Sato
Satoru C/O Seiko Instruments Inc. Konuma
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of EP0631879A2 publication Critical patent/EP0631879A2/de
Publication of EP0631879A3 publication Critical patent/EP0631879A3/de
Withdrawn legal-status Critical Current

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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
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/30—Embodiments of or processes related to thermal heads

Definitions

  • This invention relates to a printing apparatus which has a detecting device which detects the existence of a printing paper.
  • a photo-sensor 8 is soldered on the board 9 which is fixed on the sensor holder 10 and such sensor holder 10 is fixed on the frame 1.
  • a multiple number of circuit pattern 11 is fixed, for example, with solder, and a connector 12 is fixed at the top of said circuit pattern 11.
  • the object of this invention is to solve such problems in prior art above and to obtain high precision and less-expensive printing apparatus with fewer parts.
  • the object of the invention is to obtain a high precision printing apparatus with smaller number of parts, which can detect the existence of the recording paper.
  • this invention is to provide a high precision and less-expensive printing apparatus with fewer parts than in prior art, in no relation to the passing route of recording paper by way of assembly of the sensor which detects the existence of the recording paper directly onto the thermal head holder or the line thermal head board.
  • the sensor which detects the existence of the recording paper is assembled directly on to the thermal head, board, sensor holder, etc. are cut, and assembling time of such parts above can be shortened.
  • the photosensor is to be fixed around the neighborhood of line thermal head, the volume of data which may disappear originating from the interval between the sensor and the line thermal head above can be decreased, and as the result, the memory size prepared against such missing of data as above can be minimized.
  • Fig. 1 shows the cross section drawing of the printing apparatus in this invention.
  • Fig. 2 shows the side view drawing of the cross section of the printing apparatus in this invention.
  • Fig. 3 shows the plain view drawing of the line thermal head in this invention.
  • Fig. 4 shows the plain view drawing of the line thermal head in this invention.
  • Fig. 5 shows the side view cross section drawing of the printing apparatus in prior art.
  • Fig. 6 shows the side view cross section drawing of the printing apparatus in prior art.
  • Fig. 1 shows a cross section drawing of a printing apparatus in this invention.
  • 1 is the frame
  • 2 is the platen, which is held by the frame with stem and rotates around the stem.
  • the line thermal head which has a plural number of head resisters, and at the rear side of such line thermal head is fixed the heat radiation board 4.
  • the heat resister is set in the way that it has contact with and press the platen 2, on the surface of the line thermal head which has contact with the platen 2, there exists a multiple number of heat resisters 6 which is layouted in the strait line.
  • the recording paper 7 is carried towards the arrow signal A through either paper guide due to the rotation of the platen by way of a driver which is not shown in these figures.
  • the emitting element 8 is a photosensor which in the combination of both emitting element and euphoric element.
  • the light or the ultraviolet light from the emitting element reflects itself against the recording paper and then is detected by the euphoric element.
  • the light or the ultra violet light from the emitting element is not reflected if the recording paper is not placed at an appropriate predetermined position. Therefore, such light from the emitting element is not detected by the euphoric element.
  • the photosensor 8 is fixed at the sealed portion 3a set at the neighborhood of the heat resistors 6 of the line thermal head 3, and is connected electrically to the input/output line of the thermal head 3.
  • an printing apparatus can be constituted, which can detect the existence of the printing paper without the sensor set together with sensor board or its holder those which is separately arranged, by way that the photosensor is directly set around the neighborhood of the heating resistors of the line thermal printer.
  • Fig. 4 shows another embodiment in this invention.
  • the constitution of this embodiment is as the photosensor 8 is set on the heat radiation board 4 which is fixed at the rear side of the line thermal head 3.
  • the photosensor 8 arranged on the heat radiation board 4 is around the neighborhood of the line thermal head 3, as a result of it, a printer apparatus can detect the existence of the printing paper without separately prepared the sensor board or holder with the sensor. And therefore even in this embodiment, too, the data which may disappear because of the above and the memory size against thereof, can be decreased, since the photosensor can be arranged even in this embodiment around the neighborhood of the heat resistors.
  • the photosensor for the detection of the existence of the recording paper is set directly on the line thermal head or on the heat radiation board fixed at the neighborhood of the line thermal head, many kinds of the effects can be realized, such as the detection of the existence of the recording paper with smaller number of parts, the decrease in the volume of missing data originated from the distance between the sensor and the heat resistor, and therefore the decrease in the memory size for the prevention of missing data due to the above, etc.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)
EP94110030A 1993-06-30 1994-06-28 Druckgerät mit Papierdetektor. Withdrawn EP0631879A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP36089/93U 1993-06-30
JP036089U JPH075738U (ja) 1993-06-30 1993-06-30 プリンタ装置

Publications (2)

Publication Number Publication Date
EP0631879A2 true EP0631879A2 (de) 1995-01-04
EP0631879A3 EP0631879A3 (de) 1995-07-26

Family

ID=12460035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110030A Withdrawn EP0631879A3 (de) 1993-06-30 1994-06-28 Druckgerät mit Papierdetektor.

Country Status (3)

Country Link
EP (1) EP0631879A3 (de)
JP (1) JPH075738U (de)
KR (1) KR950000408A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100431062B1 (ko) * 1997-03-12 2004-07-27 제일모직주식회사 비자성 1성분 흑색 토너 입자의 제조방법
KR100347315B1 (ko) * 1997-12-22 2003-02-19 제일모직주식회사 비자성 일성분 흑색 토너의 제조방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5680481A (en) * 1979-12-07 1981-07-01 Shinko Electric Co Ltd Form detection device of thermal printing device
JPS5874381A (ja) * 1981-10-30 1983-05-04 Canon Inc サ−マルプリンタ−
JPS60176789A (ja) * 1984-02-23 1985-09-10 Toshiba Corp プリンタの印字用紙検出装置
JPS6463161A (en) * 1987-09-02 1989-03-09 Nec Corp Thermal head
JP3278225B2 (ja) * 1993-02-12 2002-04-30 マツダ株式会社 気体燃料エンジン

Also Published As

Publication number Publication date
EP0631879A3 (de) 1995-07-26
KR950000408A (ko) 1995-01-03
JPH075738U (ja) 1995-01-27

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