Ink jet printer for delaying the stacking of the printed sheets

Details Ink jet printer for delaying the stacking of the printed sheets Ink jet printer for delaying the stacking of the printed sheets

1998-04-17

1999-11-09

Burr, Edgar

Typewriting machines

Sheet or web

For feeding sheet from stack or pack holder

347104, 271266, B65H 700

Patent

active

059801417

ABSTRACT:
The printer (10) has an ink jet printhead (12) suitable for printing single sheets (14) and a control device (40) adapted to delay expulsion of the same to a collection tray (16), with the purpose of extending the drying time of the ink ejected by the printhead (12) on each sheet, before a following sheet is stacked thereon. The device (40) is suitable for controlling means (17, 25) for feeding of the sheets (14) through the printer (10) so as to temporarily stop the feeding of a first sheet (14a) after it has been printed on, then to feed a second sheet (14b) until it comes to a predetermined minimum distance (D) from the first sheet (14a), and finally to simultaneously feed the first sheet (14a) and the second sheet (14b), so as to expel the first sheet (14a) to the collection tray (16) and to further feed the second sheet (14b) so that it can be printed on. The device (40) preferably comprises a group consisting of a threaded element (61) and a toothed element (62), which are adapted to couple and uncouple by torsional means, rotating with respect to one another, so that pairs of sheet expulsion rollers (42a,42b) are disconnected from a sheet feeding roller (27), during a predetermined relative rotation of the two elements (61,62).

REFERENCES:
patent: 4566014 (1986-01-01), Paranjpe et al.
Patent Abstracts of Japan, vol. 095, No. 011, Dec. 26, 1995, JP 07 205416A (Canon Inc.).
Patent Abstracts of Japan, vol. 014, No. 570 (M-1060), Dec. 18, 1990, JP 02 245356 A (Canon Inc.).

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