Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1995-11-02
1997-03-25
Eickholt, Eugene H.
Typewriting machines
Sheet or web
For feeding web record-medium
101 9307, 83879, 83697, B41J 1168
Patent
active
056137885
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a cutting device for cutting a print carrier in a printer, especially in a cash register or till printer, having a blade which is movable along at least one guideway against a fixed counterblade. In an open setting, the blade frees an opening to allow the print carrier to be passed through. In a closed setting, the blade has at least partially cut through the print carrier. The blade is moveable between the open setting and the closed setting by an adjusting mechanism.
A cutting device is disclosed in DE 34 45 744 A1. It serves optionally to deliver a starting cut or severance cut to a paper strip in a till printer. The blade is connected to a slide block, which is guided in an eccentric slideway of a slotted linkplate. Upon rotary motion of the slotted linkplate, the blade performs a stroke motion, the paper roll being fully or only partially cut through depending upon the direction of rotation of the linkplate. Upon the cutting motion, cutting forces are generated which can result in the blade being tilted. Consequently, the guideways incur wear and the quality of the cut may be adversely affected.
SUMMARY OF THE INVENTION
An object of the invention is to specify a cutting device which operates with a high cut quality and low wear.
This object is achieved for a cutting device improved over the type stated in the introduction in the blade has at least two guide elements, which are disposed at a distance apart on that side of the blade facing away from the cutter of the blade, and that the adjusting mechanism for adjusting the blade engages in the guide elements.
The invention has the effect that the adjusting mechanism guides the blade, at at least two points, along the guideway. The blade is consequently unable to tilt, even where laterally directed cutting forces are generated. The guideway on which the blade slides is thus subjected to less wear. Furthermore, as a result of the precise guidance of the blade, the cut is evenly executed, thereby producing a high cut quality. In addition, the force which is necessary for the cutting is induced at a plurality of points on the blade, so that lower component forces are generated at the corresponding guide elements also. The wear to the bearings is thereby reduced and the cutting device functions more reliably overall.
In a preferred illustrative embodiment of the invention, plastic bearings are used as guide elements, in which journals of the adjusting mechanism engage. These plastics bearings can be inserted into corresponding openings in the blade such that they lock in place by means of a clip fastening, thereby making for simple assembly. The use of plastic bearings means that the journals slide without much friction in the guide element, so that the force expended remains small and wear is further reduced.
In another illustrative embodiment, the guideways are disposed in a plane running parallel to the face of the counterblade on which the blade slides during the cutting operation, the plane being disposed at a small distance beneath the face. As a result of these measures, production tolerances are counterbalanced, thereby making for an inexpensive cutting device construction in overall terms.
A refinement of the abovementioned embodiment provides that the outer corners of the cutter segments run obliquely upward such that, during the cutting motion, the blade is guided onto the face of the counterblade. As a result of these measures, the operating reliability of the cutting device is guaranteed, even where the face of the counterblade and the plane of the guideways are relatively far apart.
Another refinement is characterized in that the blade is guided under spring pressure against the guideways. The spring pressure can be chosen such that the blade, in a region between the guideways, sags slightly downward. This means that the cutter of the blade bears closely throughout its length against the cutter of the counterblade and thus produces a clean cut. In addition, the cutters of the blade and c
REFERENCES:
patent: 3941228 (1976-03-01), Ueiser
patent: 4211498 (1980-07-01), Shimizu et al.
patent: 4312597 (1982-01-01), Shimizu et al.
patent: 4451167 (1984-05-01), Honma et al.
patent: 4544293 (1985-10-01), Cranston et al.
patent: 4732068 (1988-03-01), Yasuda et al.
patent: 5259681 (1993-11-01), Uitazawa
IBM Technical Disclosure Bulletin, vol. 32, No. 3B, Aug. 1989, pp. 421-422. "Customer Replaceable Cash Receipt Cutter".
"Receipt Paper Cutoff Mechanism" IBM Technical Disclosure Bulletin, vol. 31, No. 5 Oct. 1988 pp. 414-415.
Eickholt Eugene H.
Siemens Nixdorf Informationssysteme Aktiengesellschaft
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