EP0437384B1 - Appareil de traitement de documents à l'aide d'une tête de traitement montée sur un capot - Google Patents

Appareil de traitement de documents à l'aide d'une tête de traitement montée sur un capot Download PDF

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Publication number
EP0437384B1
EP0437384B1 EP91400013A EP91400013A EP0437384B1 EP 0437384 B1 EP0437384 B1 EP 0437384B1 EP 91400013 A EP91400013 A EP 91400013A EP 91400013 A EP91400013 A EP 91400013A EP 0437384 B1 EP0437384 B1 EP 0437384B1
Authority
EP
European Patent Office
Prior art keywords
cover
head
processing head
document
processing
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.)
Expired - Lifetime
Application number
EP91400013A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0437384A1 (fr
Inventor
Michel Brot
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of EP0437384A1 publication Critical patent/EP0437384A1/fr
Application granted granted Critical
Publication of EP0437384B1 publication Critical patent/EP0437384B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/387—Automatic cut-off devices

Definitions

  • the present invention relates to an apparatus for processing documents, of the known type which comprises a processing head mounted on an access cover inside the apparatus.
  • the invention applies in particular to printers, and more particularly to thermal printers. It can also apply to other devices, such as fax machines or photocopiers.
  • the cover allows access to the interior of the device, for placing the paper to be printed in the case of a printer, or, more generally, in the event of difficulties such as the paper jams, and the processing head is put into the working position only when the cover is closed.
  • a sensor is provided for detecting the closure of the cover, for example an optical sensor, or even a contact, which authorizes the operation of the device only if the closure is detected.
  • the processing head for example a thermal printing head
  • the processing head is a bar of length equal to the width of the processed document, and which processes one line of pixels at a time of the processed document.
  • this bar is arranged along the free edge of the cover when it is open and bears against a support of the document to be processed, for example a drive roller thereof, when the cover is closed.
  • a support of the document to be processed for example a drive roller thereof
  • the present invention aims to overcome this drawback.
  • an apparatus of the type defined above characterized in that it comprises means sensitive to the position of the treatment head so as to authorize the operation of the apparatus only if said head is in working position.
  • the treatment head is mounted on elastic means integral with the cover in order, in the working position against a document to be processed when the cover is closed, to be pushed back towards the cover against the action of the elastic means thus distorted and at least one sensor for, in the working position of the head, detecting the deformation of said elastic means.
  • the treatment head is elongated and means are provided which are sensitive to the position of each of its ends.
  • a document processing apparatus here a thermal printer, comprises a roller 1, for driving a document 2 to be printed, and a thermal printing head 3, mounted on a cover 4 allowing access to the interior of the printer.
  • the cover pivots about an axis 41 to pass from its open position in FIG. 1 to its closed position in FIG. 2.
  • the print head 3 is mounted on an elastic blade 5 secured to the cover 4.
  • the elastic blade 5 recalls the head 3 towards the roller 1 and, in the closed position of the cover 4 and working of head 3, this one, in abutment against the document 2 resting on the roller 1, is pushed towards the cover 4 against the action of the blade 5 thus deformed.
  • a contact 6 is mounted on the cover 4 to detect the deformation of the elastic blade 5 when the head 3 is pressurized.
  • the contact 6 is open, which prevents, thanks to an electronic circuit not shown to which it is connected, the operation of the printer.
  • the contact 6 is not sensitive to the position of the cover, but to that of the head 3 when it is in the correct working position, there is no risk of seeing the operation authorized while the head 3 is incorrectly positioned.
  • a single position sensor such as contact 6 may suffice.
  • two sensors such as contact 6, one at each of the ends of the print head, the two contacts that must be closed to allow operation.
  • the invention is not limited to a printing head and applies to any processing head whose position, in the working phase, must be well defined.
  • any other position sensor for example optical.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Facsimile Heads (AREA)
  • Common Mechanisms (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • User Interface Of Digital Computer (AREA)
EP91400013A 1990-01-09 1991-01-04 Appareil de traitement de documents à l'aide d'une tête de traitement montée sur un capot Expired - Lifetime EP0437384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000157 1990-01-09
FR9000157A FR2656832B1 (fr) 1990-01-09 1990-01-09 Appareil de traitement de documents a l'aide d'une tete de traitement montee sur un capot.

Publications (2)

Publication Number Publication Date
EP0437384A1 EP0437384A1 (fr) 1991-07-17
EP0437384B1 true EP0437384B1 (fr) 1994-06-15

Family

ID=9392593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400013A Expired - Lifetime EP0437384B1 (fr) 1990-01-09 1991-01-04 Appareil de traitement de documents à l'aide d'une tête de traitement montée sur un capot

Country Status (6)

Country Link
EP (1) EP0437384B1 (da)
AT (1) ATE107233T1 (da)
DE (1) DE69102437T2 (da)
DK (1) DK0437384T3 (da)
ES (1) ES2057788T3 (da)
FR (1) FR2656832B1 (da)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009001C2 (de) * 1980-03-08 1988-07-28 Adlerwerke Vorm. Heinrich Kleyer Ag, 6000 Frankfurt Abdeckung für den Schreibbereich von Druckern, Schreibmaschinen oder Geräten ähnlicher Art
GB2159770B (en) * 1984-03-10 1988-01-06 Control Systems Ltd Thermal printer
JPS60260374A (ja) * 1984-06-08 1985-12-23 Canon Inc 記録装置
US4718785A (en) * 1987-02-12 1988-01-12 Eastman Kodak Company Compliant head loading mechanism for thermal printer

Also Published As

Publication number Publication date
FR2656832B1 (fr) 1994-12-23
ES2057788T3 (es) 1994-10-16
ATE107233T1 (de) 1994-07-15
DE69102437D1 (de) 1994-07-21
DE69102437T2 (de) 1995-02-02
FR2656832A1 (fr) 1991-07-12
EP0437384A1 (fr) 1991-07-17
DK0437384T3 (da) 1994-10-24

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