GB2323997A - Flat-bed image analysis device for an office machine - Google Patents

Flat-bed image analysis device for an office machine Download PDF

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Publication number
GB2323997A
GB2323997A GB9806943A GB9806943A GB2323997A GB 2323997 A GB2323997 A GB 2323997A GB 9806943 A GB9806943 A GB 9806943A GB 9806943 A GB9806943 A GB 9806943A GB 2323997 A GB2323997 A GB 2323997A
Authority
GB
United Kingdom
Prior art keywords
analysis
face
flat
analysis device
image analysis
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.)
Granted
Application number
GB9806943A
Other versions
GB9806943D0 (en
GB2323997B (en
Inventor
Guy Chevrollier
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 GB9806943D0 publication Critical patent/GB9806943D0/en
Publication of GB2323997A publication Critical patent/GB2323997A/en
Application granted granted Critical
Publication of GB2323997B publication Critical patent/GB2323997B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1026—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components using a belt or cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1017—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components the main-scanning components remaining positionally invariant with respect to one another in the sub-scanning direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1039—Movement of the main scanning components
    • H04N1/1043—Movement of the main scanning components of a sensor array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0456—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207 for maintaining a predetermined distance between the scanning elements and the picture-bearing surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimiles In General (AREA)
  • Image Input (AREA)

Abstract

The device comprises an analysis window 2 having an image support face 11 and an image analysis face 12, a photosensing module 3 eg a contact image sensor, mounted on a transport carriage 7 and intended to analyse the image through the analysis face 12 along an analysis line while being driven so as to move in order to scan the analysis face 12, and means for driving the photosensing module 3 to cause it to move. The transport carriage 7 is fixedly attached to the photosensing module 3 and is mounted so as to move in translation and in rotation on a guide axis 8 which is mounted on springs 10 under the action of which the photosensing module 3 and its carriage 7 abut against the analysis face 12 . The device can be applied to facsimile machines.

Description

2323997
1 DESCRIPTION FLAT-BED IMAGE ANALYSIS DEVICE FOR AN OFFICE MACHINE
The invention relates to an image analysis device for a facsimile machine, photocopier or other office machine, intended to analyse an image with the aid of photosensors of the CIS (Contact Image Sensor) type, for example, in order to digitise it.
More particularly, the invention relates to a flat-bed image analysis device of a type comprising an analysis window having a support face for a document carrying the image to be analysed and an analysis face, and further 0 comprising a photosensing rail mounted on a transport carriage and intended to analyse the image along an analysis line while being driven so as to move in order to scan the analysis face.
In order for the rail to move, the two ends thereof are introduced resPectively into two housings intended to be driven concomitantly in translat ion by a motor.
An analysis device of this type requires extremely precise assembly which is costly in terms of labour, in particular for the purpose of positioning the rail with respect to the analysis face and the coordinated movement of the two ends of the rail.
Moreover, the analysis window has an effective analysis surface which is defined by two lateral edgings resulting from the movement of the two housings masking the analysis face in line with the two ends of the rail.
2 The invention aims not only to reduce the labour costs of assembling the device but also aims to make the entire analysis face useable for analysis.
To this end the invention relates to a flat-bed image analysis device for an office machine, comprising: - an analysis window having an image support face and an image analysis face, - a photosensing module mounted on a transport carriage and intended to analyse the image through the analysis face along an analysis line while being driven so as to move in order to scan the analysis face, and - means for driving the photosensing module to cause it to move, the transport carriage being fixedly attached to the photosensing module and being rotationally mounted on, and translationally movable along, a guide axis which is mounted on spring means, under the action of which the carriage carrying the photosensing module is urged into abutment with the analysis face.
With the aid of the invention, the analysis line is perfectly defined.
Advantageously, the carriage includes abutment means which abut said analysis face and which are dimensioned to position the photosensing module at a specific distance from the analysis face.
The abutment means are preferably offset with respect to the photosensing module in the scanning direction.
The effective analysis surface is therefore not reduced.
The two ends of the guide axis are advantageously mounted on springs.
It is also advantageous that the carriage comprises a bore for receiving. the guide axis, provided in its central part.
3 The invention will be better understood with the aid of the following description of a particular embodiment of a flat-bed image analysis device in accordance with the present invention with reference to the attached drawings in which:
Figure 1 illustrates a perspective view of the particular embodiment of the flat-bed image analysis device (shown inverted for explanation purposes); Figure 2 illustrates a cross-sectional view of the device of Figure 1 along the line II-II; and Figure 3 illustrates a cross-sectional view of the device of Figure 1 along the line III-III.
The image analysis device illustrated in Figure 1 is intended to analyse, in the flat position, an image in a document, a page of a book or on a sheet, for example.
The analysis device is intended to be integrated into an image analysing office machine, not illustrated. It may, by way of example, be a facsimile machine or a photocopier.
The image analysis device comprises a casing 1, an analysis window 2, and a photosensing rail 3 3, in this case a CIS (Contact Image Sensor) disposed inside the casing 1 and intended to analyse the image along an analysis line by scanning. The rail 3 is associated with a driving mechanism for producing movement, which is explained hereinunder.
The casing 1, in this case parallelepiped in shape, has a bottom 4 and four side walls 5, 5', 6, 6'. It will be noted that the bottom 4 and the side wall 4 6' are not illustrated in Figure 1 for the sake of clarity.
The transparent rectangular analysis window 2 is mounted on the side walls of the casing 1, parallel to the bottom 4 and acts as a cover for the casing 1. The window 2 has an outer image-supporting face 11 on which the document to be analysed must be placed, and an inner analysis face 12.
The driving mechanism for the analysis rail J31 comprises a transport carriage 7 for the rail 3, fixedly attached to the rail 3 and extending in this case over the whole length of the rail 3.
The carriage 7 is mounted so as to move in translation and in rotation on a guide axis 8.
The guide axis 8 is mounted inside the casing 1, the two opposite side walls 5, 5' of the casing 1 acting as support bearings. The axis 8 in this case extends parallel to the longitudinal edges of the window 2, in the proximity of the central part thereof The two free ends of the guide axis 8 are mounted respectively on two leaf springs 10, 10' fixed to the bottom 4 of the casing 1 in the proximity of the through orifices 9, 9' of the axis 8 in the side walls 5, 5'. The cross-section of the through orifices 9, 9' of the axis 8 in the side walls 5, 5' is greater than the transverse cross-section of the guide axis 8 in order to permit slight displacement of the guide axis 8 perpendicular to the bottom 4 against the action of the springs 10, 10'.
The through bore 15 of the guide axis 8 in the carriage 7 has an axis perpendicular to the direction in which the carriage 7 extends and is located in the central part of the carriage 7. The carriage 7 extends over the whole width of the analysis window 2 and includes, at its free ends, two blocks 13, 13' for abutment against the analysis window 2 and which are offset with respect to the photosensing rail J3) in the scanning direction which is parallel to the guide axis 8. The height of the blocks 13, 1Y, perpendicular to the analysis face 12, is substantially greater than that of the rail J3 so as to position the rail 3 at a specific distance from the analysis face 12.
The driving mechanism also comprises a belt 14 for driving the transport carriage 7 and associated with a driving motor, not illustrated, mounted on the casing 1 and extending along the guide axis 8.
After the structural description of the analysis device, its operation will now be described.
In the analysis position the carriage 7, fixedly attached to the photosensing rail 331, is rotationally blocked by the analysis window 2 against which the blocks 13, 1 3)' of the carriage 7 abut under the pushing action of the springs 10, 10'.
For the analysis of an image on a document or on a sheet, for example, a user places the sheet on the support face 11 of the analysis window 2, turning the image to be analysed towards the support face 11.
During analysis the belt 14, driven by the motor, drives the carriage so as to move it along the guide axis 8 in the scanning direction. During the movement of the carriage 7, the photosensing rail 3 analyses the image along its analysis line through the analysis face 12 by scanning.
6 It will be emphasised at this point that the offset arrangement of the abutment blocks 13, 13' with respect to the rail 3 in the scanning direction permits analysis by scanning over the whole width of the analysis window 2.
7

Claims (6)

1. A flat-bed image analysis device for an office machine, comprising: an analysis window having an image support face and an image analysis face, - a photosensing module mounted on a transport carriage and intended to analyse the image through the analysis face along an analysis line while being driven so as to move in order to scan the analysis face, and means for driving the photosensing module to cause it to move, the transport carriage being fixedly attached to the photosensing module and being rotationally mounted on, and translationally movable along, a guide axis which is mounted on spring means, under the action of which the carriage carrying the photosensing module is urged into abutment with the analysis face.
2. A flat-bed image analysis device according to claim 1, wherein the carriage includes abutment means which abut said analysis face and which are dimensioned to position the photosensing module at a specific distance from the analysis face.
3. A flat-bed image analysis device according to claim 2, wherein the abutment means are offset with respect to the photosensing module in the scanning direction.
4. A flat-bed image analysis device according to any of claims I to 33, wherein the two ends of the guide axis are mounted on springs.
5. A flat-bed image analysis device according to any of claims I to 4, wherein the carriage comprises a bore in its central part to receive the guide axis.
6. A flat-bed image analysis device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB9806943A 1997-04-02 1998-03-31 Flat-bed image analysis device for an office machine Expired - Fee Related GB2323997B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9703991A FR2761845B1 (en) 1997-04-02 1997-04-02 FLAT IMAGE ANALYSIS DEVICE FOR OFFICE MACHINE

Publications (3)

Publication Number Publication Date
GB9806943D0 GB9806943D0 (en) 1998-05-27
GB2323997A true GB2323997A (en) 1998-10-07
GB2323997B GB2323997B (en) 2001-04-11

Family

ID=9505424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9806943A Expired - Fee Related GB2323997B (en) 1997-04-02 1998-03-31 Flat-bed image analysis device for an office machine

Country Status (3)

Country Link
DE (1) DE19814692B4 (en)
FR (1) FR2761845B1 (en)
GB (1) GB2323997B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405046A (en) * 2003-08-11 2005-02-16 Hewlett Packard Development Co Optical image scanner read head and translation system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194410A (en) * 1986-05-20 1988-03-02 Sharp Kk Image reading unit
EP0479242A2 (en) * 1990-10-03 1992-04-08 Rohm Co., Ltd. Scanning head
US5610731A (en) * 1994-04-18 1997-03-11 Ricoh Company, Ltd. Image scanner having contact-type image sensor movable under automatic document feeder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4486786A (en) * 1981-09-08 1984-12-04 Canon Kabushiki Kaisha Original reading device
JPS6030259A (en) * 1983-07-29 1985-02-15 Toshiba Corp Image information reader
JPS6360667A (en) * 1986-08-28 1988-03-16 Pfu Ltd Image reader
JP2579505B2 (en) * 1987-11-30 1997-02-05 三田工業株式会社 Support mechanism
JPH01293755A (en) * 1988-05-21 1989-11-27 Canon Inc Original reader
DE69116850T2 (en) * 1991-03-12 1996-11-21 Agfa Gevaert Nv Optical scanner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194410A (en) * 1986-05-20 1988-03-02 Sharp Kk Image reading unit
EP0479242A2 (en) * 1990-10-03 1992-04-08 Rohm Co., Ltd. Scanning head
US5610731A (en) * 1994-04-18 1997-03-11 Ricoh Company, Ltd. Image scanner having contact-type image sensor movable under automatic document feeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405046A (en) * 2003-08-11 2005-02-16 Hewlett Packard Development Co Optical image scanner read head and translation system

Also Published As

Publication number Publication date
DE19814692B4 (en) 2008-08-28
DE19814692A1 (en) 1998-10-08
GB9806943D0 (en) 1998-05-27
FR2761845A1 (en) 1998-10-09
FR2761845B1 (en) 1999-06-04
GB2323997B (en) 2001-04-11

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Free format text: REGISTERED BETWEEN 20090319 AND 20090325

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20170331