Cutting and mounting apparatus

Metal working – Plural diverse manufacturing apparatus including means for... – Including machining means

Patent

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Details

29824, 53520, 40158B, 156517, 83160, 83167, G03D 1510

Patent

active

046988831

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a cutting and mounting apparatus for cutting film sections which can be lowered into a slide mount disposed in a slider below a cutting tool, and which upon withdrawal of the slider can be snapped into the slide mount while resting against a guiding jaw.
From EP-PS No. 0 009 144, a cutting and mounting apparatus is known in the case of which a slide film section can be snapped into a common-type slide mount. This apparatus comprises a slide mount shifting means and has two convex bending jaws facing each other at a distance defined by a film section. Each bending jaw is designed on an abutment and has an impact surface facing downwardly. Both abutments are pivotable and spring-biased so as to rest on the front and rear frame portion, respectively, of a slide mount shiftable below the abutments. The rear abutment is pivotally arranged in a guide block which can be shifted in the longitudinal direction by means of a slider connected to it by a spring so that during a first phase of movement of the shifting means the rear abutment can be moved over a certain distance towards the stationarily and pivotally mounted front abutment across the surface of the slide mount. During this shifting movement, the rear edge of the film section is seized by the impact surface of the bending jaw of the rear abutment and shifted forwardly. During said shifting movement, the film section first engages with its rear edge the area of a groove at the rear frame portion of the slide mount, and then abuts with its front edge the impact surface of the front bending jaw. After the rear abutment has been shifted over a short distance, the slide mount starts shifting and is first slid with its front frame portion below the front abutment. Since the film section is supported with its rear edge in the groove of the rear frame portion and rests with its front edge against the impact surface of the front bending jaw, the central area of the film section bends upwardly upon further shifting of the slide mount and snaps into a groove in the front frame portion of the slide mount.
The known shifting means includes a great number of movable parts and therefore has an extremely complicated construction. Moreover, its manufacture is expensive.
It is the object of the invention to modify and improve the shifting means of the known cutting and mounting apparatus such that pivotally movable components are not necessary, and that the shifting means functions reliably despite a simple construction of the apparatus.
According to the invention, this object is achieved in that a resilient means is provided urging the slide mount free from play against the stationary guiding jaw.
In a particularly advantageous modification, the guiding jaw is rigid and forms part of a cutting plate, or part of a cover plate serving to support a cutting plate and covering the guide channel of the slider.
In another advantageous modification, the resilient means is designed as a leaf spring extending below the slider.
In a further modification of the invention, the leaf spring is arranged in a recess at the lower side of the slider, and the free end of a resilient arm of the leaf spring, projecting in the direction of extension of the slider, includes a curved portion which projects through an opening in the bottom surface of an indentation accommodating the slide mount and designed in the upper side of the slider, rests against the slide mount and lifts it by at least the width of a gap between the upper side of the slider and the lower side of the guiding jaw.
In the case of the apparatus according to the invention, the guiding jaw necessary for snapping the film section into the slide mount forms an integral part with a component which is required anyway for supporting the cutting plate and covering the guide channel of the slider. In spite of a gap between the slider and the guiding jaw, the slide mount is guided accurately and free from play when passing below the guiding jaw.
Other features and advantages can be inferred from the other subcla

REFERENCES:
patent: 3248846 (1966-05-01), Engelstein
patent: 3274665 (1966-09-01), Higginson et al.
patent: 3707755 (1973-01-01), Pettersson
patent: 3780608 (1973-12-01), Brown
patent: 3992243 (1976-11-01), Berggren
patent: 3996683 (1976-12-01), Hanke
patent: 4172003 (1979-10-01), Bachelder et al.
patent: 4256527 (1981-03-01), Green
patent: 4461105 (1984-01-01), Thebault

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