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
  • H04N1/06—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 cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
  • H04N1/0671—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 cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface with sub-scanning by translational movement of the main-scanning components
• • 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
  • H04N1/06—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 cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
  • H04N1/0657—Scanning a transparent surface, e.g. reading a transparency original

Definitions

• a controlled asynchronous motor drive for a drum scanner the rotor of which is designed as a hollow shaft for arranging the interior lighting device.
• Drum scanners are used for scanning and data acquisition of image originals.
• these scanners require a rotation run which is kept as free as possible from trembling gear or other drive transmission influences.
• a compact design in the axial direction is sought, particularly in the case of scanners with a vertical axis direction.
• the present invention fulfills both tasks, in that, unlike drum scanners which have become known to date, the The transmission is dispensed with by means of a gear transmission or belt drive.
• the scanner axis is designed in the form of a hollow shaft directly as a rotor of a controlled asynchronous motor.
• the document illumination inside the scanning drum can advantageously be actuated by the hollow shaft, which is both
• Changing the scanning drum is easier, and also contributes to the compactness of the design.
• the tensioning device described in patent application 01/95 can advantageously be used as the connecting element between the drive device and the changing drum
• Figure 1 shows the principle of a drum scanner
• Figure 2 describes the drive type by cross-sectional representation
• Figure 1 demonstrates the principle of a drum scanner with a vertical drum axis.
• a scanning drum (1) clamped on one side is made of glass or glass-like plastic in order to be able to scan through transparent and transparent image material.
• the scanning drum is contained in a metal flange (2) and rests with it the motor flange (5), which forms a unit with the drive motor (6), the metal flange (2) and the motor flange (5) are coupled by three clamping devices, which are offset by 120 ° around the circumference and are housed in the motor flange.
• One of the clamping devices is through a circle (3) indicated During a scanning process, the drum (1) and rotates the lighting arm (7) and the scanning unit (8) move, rigidly coupled together, parallel to the drum axis in the direction of the drive motor (6). An image template mounted on the drum surface is broken down into scanning lines by the light beam (9). At the end of a scan, the lighting arm ( 7) immersed in the hollow axis of the motor flange (5) and drive motor (6)
• FIG. 2 shows the drive principle as a cross-sectional view.
• the driving asynchronous motor (6) consists of a stator housing (10) with a stator winding (11) and a hollow-axis rotor (5) with a rotor winding (12).
• the rotor is designed as a plate-like flange at the upper end
• This motor flange carries three clamping devices (3) which are offset by 120 ° and which, by means of their clamping levers (15), press the collar of the scanning drum flange (2) together with the motor flange.
• a detaching finger (14) of the moving mirror head can automatically detach it Operate the release lever (13) to loosen the clamping lever (15).
• the tensioning device (3) as an advantageous connection between the scanning drum and the motor flange is already known from the parallel patent application 19555750 6
• FIG. 2 also demonstrates the path of the light beam (9) of the drum interior lighting.
• the light beam (9) leads through the hollow axis of the drive via a deflection mirror (17) to the scanning device (8). It passes the glass scanning drum ( 1) that carries the sample
• FIG. 2 shows how direct drive without intermediate gear shifting and hollow axis construction contribute to the compact design

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Facsimile Scanning Arrangements (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7782979

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (7)

• 1996
  • 1996-01-17 DE DE1996101524 patent/DE19601524A1/de not_active Withdrawn
  • 1996-12-10 WO PCT/DE1996/002363 patent/WO1997026755A1/de not_active Application Discontinuation
  • 1996-12-10 EP EP96946179A patent/EP0875113A1/de not_active Withdrawn
  • 1996-12-10 JP JP9525574A patent/JP2000505258A/ja active Pending

Non-Patent Citations (1)

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