Material or article handling – Apparatus for moving intersupporting articles into – within,... – Unstacking apparatus
Patent
1996-02-07
1997-09-16
Merritt, Karen B.
Material or article handling
Apparatus for moving intersupporting articles into, within,...
Unstacking apparatus
221236, 271 1009, 4147958, B65G 5906
Patent
active
056673558
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to a device for removing the lowermost plate or card of a stack of plates or cards guided in a shaft, e.g., a plastic card used as a data storage medium.
BACKGROUND OF THE INVENTION
It has been known to provide an arrangement wherein the lowermost card of a stack of cards is pulled off by means of a conveyor belt, against which the lowermost card is pressed by the weight of the stack of cards. This measure has the disadvantage that the whole-area of contact is subject to frictional forces, namely the contact area along the card to be pulled off and the next card. If the cards are printed or are provided with other colored layers, there is a risk of a rubbing off of the color coating and therefore a risk of a smudging of the print. This problem occurs especially during the handling of plastic cards, which are designed as data storage media.
A device for removing the lowermost plate from a stack of plates guided in the shaft is known from DE-A-34 42 123.
The front edge of the lowermost plate lies on a flat support surface in the circumference of a first push-off member. The rear edge of the lowermost plate rests on a rotatably mounted roller, in the area of which two additional push-off members are provided, one of which can be moved to and from as a pusher in the plane of the lowermost plate and the other is designed as a rocker.
To remove the lowermost plate, this plate is first displaced by a small mount to the rear by the first push-off member, while the pusher evades this movement, and the rocker is located in a rearwardly directed starting position. During a further rotary movement of the first push-off member, the front edge of the plate comes free from this push-off member, and the pusher moves the rear edge of the plate into its original position. The rear edge of the plate now rolls on the stationary roller, and the plate assumes an oblique position. The front edge of the plate is supported in this oblique position on an oblique sliding surface, while only the second push-off member, designed as a rocker, acts on the rear edge of the plate and pushes off the plate along the sliding surface in the direction of a conveyor located under it. Consequently, two rear push-off members, which require a separate drive each and whose movements must be coordinated with one another, are necessary for pushing off the lowermost plate in this prior-art device.
SUMMARY AND OBJECTS OF THE INVENTION
The primary object of the present invention is to develop a decollating device, which makes it possible to pull a card out of a stack without large-area frictional contact and which prevents the cards from being bent or deformed during the decollation.
A further object of the invention is to simplify the prior art device and to design it for removing cards, especially plastic cards used as data storage media.
According to the invention, a device is provided for removing the lower most card of a stack of cards, the cards being guided in a shaft. The cards are for example plastic cards used as data storage medium, including for example credit cards, debit cards, security cards, phone cards and other similar data/information storage cards or plates of a similar nature. Two push-off members acting on opposite plate edges are arranged in a plane of the lower most plate. The first push-off member is mounted under a front plate edge and is designed as a rotatably driven body of revolution. The first push-off member has a flat support surface in its circumference for the front edge of the lower most plate (card) and the first push-off member generates a short lateral movement of the lowermost plate in its plane opposite the actual push-off direction. The second push-off member is designed as a rocker which evades the rear plate edge associated with it during the first push-off process and is moved in the opposite direction against the rear plate edge during the second push-off process. The device is provided for moving the cards in which the card is released by the firs
REFERENCES:
patent: 2417938 (1947-03-01), Krueger
patent: 5082268 (1992-01-01), Santoro
patent: 5395208 (1995-03-01), Mojden et al.
Bowe Systec AG
Krizek Janice L.
Merritt Karen B.
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