Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1993-07-26
1995-08-01
Wiecking, David A.
Typewriting machines
Sheet or web
For feeding web record-medium
83 82, 346 24, 358304, B41J 1168
Patent
active
054375126
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for transporting separated sections of a continuous recording substrate from a recording mechanism.
A device of this type is known from IBM Technical Disclosure Bulletin Vol. 14, No. 12, May 1972, pages 3751 and 3752. In this, the separated sections are grasped by means of a dedicated transport device and transported away to the side. The transport device is driven, via a complicated, mechanical transmission mechanism, by the constantly revolving drive shaft of the recording mechanism.
From German reference DE-A-23 43 858, (corresponding to U.S. Pat. No. 3,951,252) a device for transporting sections of a recording substrate from a recording mechanism is known, the recording mechanism having a cutting unit for separating the sections from the recording substrate, which cutting unit can be moved, in a cutting stroke and a return stroke, transversely to the direction of transport of the recording substrate across its width. The prior art document, however, contains no references as to how the separated sections can be transported or issued following the cutting operation.
German reference DE-A-35 22 022 (corresponding to U.S. Pat. No. 4,663,638) shows a printing mechanism having a blade connected downstream from the printing area and having a plurality of pairs of offtake rollers for the sections. The type of blade is not however described in detail. Nor can it be deduced from this prior art document whether the drives for the blade and for the offtake roller pairs are interactive.
German reference DE-A-32 02 264 shows a paper-cutting device in which a cylindrical rotary blade extending across the entire printer width is moved by the same drive motor as the paper transport roller. In the one direction of rotation the blade is driven and in the opposite direction of rotation the transport roller is driven. A freewheeling mechanism is assigned to both drives.
SUMMARY OF THE INVENTION
The object of the invention is to specify a device of the type stated in the introduction, in which the separated sections can be removed automatically from the recording mechanism by simple means.
This object is achieved by to a device according to the present invention for transporting separated sections of a continuous recording substrate from a recording mechanism. The recording mechanism has a cutting unit for separating the sections from the recording substrate, which cutting unit can be moved, in a cutting stroke and in a return stroke, transversely to the direction of transport of the recording substrate back and forth across its width. The device has transport elements which are disposed behind the cutting station in the direction of transport and which are drivable to create a motion grasping the separated section and to create a transporting motion for the advancement of the separated section. The transport elements are coupled by means of a gear arrangement to the cutting unit in such a way that they can be driven, both for the grasping motion and for the transporting motion, by the return stroke of the cutting unit.
This arrangement has two basic advantages. Firstly, no dedicated drive motor is required for the transportation of the separated sections. Rather, the motion of the cutting unit in its return stroke is utilized to move the transport elements and, through them, the separated sections. Secondly, there is no need for any dedicated control system governing a drive for the transport elements. These are unavoidably moved only once the cutting operation is completed, thereby enabling the separated section to be removed from the recording mechanism without any problems.
This type of coupling of the transport elements to the cutting unit can be simply realized by the gear arrangement comprising a one-way clutch, for example a freewheeling mechanism. This enables the transport elements to be permanently connected to the cutting unit. Provided that the freewheeling mechanism is suitably installed, upon the cutting stroke of the cutting unit, the motion
REFERENCES:
patent: 3890893 (1975-06-01), Kodis
patent: 3951252 (1976-04-01), Selke et al.
patent: 4544293 (1985-10-01), Cranston et al.
patent: 4557169 (1985-12-01), Kajiya et al.
patent: 4604632 (1986-08-01), Matsumoto
patent: 4663638 (1987-05-01), Hirose
patent: 4810110 (1989-03-01), Myers
"Linear-to-Rotary Converter", by R. J. Coles, IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct. 1980, pp. 2126-2127.
"Paper Cutting Attachment for Printer", By B. J. Welch et al, IBM Technical Disclosure Bulletin, vol. 14, No. 12, May 1972, pp. 3751-3752.
Siemens Nixdorf Informationssysteme Aktiengesellschaft
Wiecking David A.
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