Automatic drafting machine

Details Automatic drafting machine Automatic drafting machine

1997-01-07

2000-03-21

Hirshfeld, Andrew H.

Geometrical instruments

Scriber

33623, 271183, 271228, 347104, B43L 1300

Patent

active

060387769

ABSTRACT:
An operator separates pressure rollers 14, 16 from the corresponding drive rollers 12 for a predetermined distance prior to his drawing work on the paper and allows the paper 18 to be inserted between the drive rollers 12 and the pressure rollers 14, 16 from the front of the platen 2. An optical sensor 28 detects the paper 18. A controller drives a fan after a lapse of a predetermined time to operate a vacuum power in a vacuum chamber 4. Thereafter, the paper 18 on the platen 2 continues to be held on the platen 2 by the vacuum power. In this condition, the operator sets the paper to a mark 20 drawn on the platen 2 which indicates a set position of the paper to adjust the position of the paper 18. When the operator completes the positioning of the paper 18, he manipulates the lever to lift down the pressure rollers. Thereafter, the pressure rollers 14, 16 contact the drive rollers 12 over the paper 18 resiliently by a predetermined pressure, and the paper 18 is sandwiched between the drive rollers 12 and the pressure rollers 14, 16 on the platen 2. Finally, the controller stops the drive of a fan 30 and the arrangement of the paper is completed.

REFERENCES:
patent: 3424357 (1969-01-01), Curtze et al.
patent: 4101018 (1978-07-01), Sokolowski
patent: 4225872 (1980-09-01), Marinoff
patent: 4734987 (1988-04-01), Cleveland
patent: 4792131 (1988-12-01), Akiyama
patent: 4792249 (1988-12-01), Lahr
patent: 5182861 (1993-02-01), Suzuki et al.

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