Sheet-material associating – Associating or disassociating – Sheet associating
Patent
1996-11-18
1998-03-24
Kwon, John T.
Sheet-material associating
Associating or disassociating
Sheet associating
B65H 3902
Patent
active
057304378
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and apparatus for processing paper sheets which are punched or stamped, e.g. in order to prepare them for binding. In this case, the sheets are removed automatically from a supply stack in bundles of a specific thickness, e.g. a few millimeters, processed, turned and fed to an end stack.
2. Description of the Related Art
Apparatuses of the generic type are known (see for example, the Lloyd Machinery Ltd. brochure: Automatic Punching Machine, Model 340), where a bundle to be processed is drawn out to its full extent from the supply stack, in each case in the direction of a punching device, is turned by means of a transportation device, punched in a border region and, finally, deposited on an end stack.
In this procedure, a bundle follows the preceding bundle at a distance which--depending on the alignment of the punching device--corresponds at least to the length or width of the preceding bundle. As a result, on account of transportation-related delays, the processing device does not operate at the frequency which is possible in principle and the throughput of the apparatus remains comparatively low. Moreover, the construction of the apparatus requires a large amount of space.
SUMMARY OF THE INVENTION
This invention is intended to remedy the problems of low throughput and large space requirements common to known machines in the art. According to the present invention, a method is provided in which the bundle to be processed is shifted with respect to the supply stack, for processing purposes, by not much more than the width of the edge region which is to be processed. Likewise, it is drawn back by only approximately the same distance in order to free the processing device for the following bundle, which is thereupon brought into the processing position without the first-mentioned bundle having to be removed to the full extent beforehand. One object of the invention is to vastly reduce the risk of electrostatic charging, which may be very disruptive, in particular with use of certain films.
While being compact, the construction of the apparatus according to the invention makes it possible for the method according to the invention to be implemented reliably and quickly.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is explained in more detail hereinbelow with reference to figures, which merely illustrate an exemplary embodiment and in which:
FIG. 1a shows a schematic side view of an apparatus for processing bundles of sheets in preparation for binding according to the invention,
FIG. 1b shows a side view corresponding to FIG. 1a, in which case the apparatus has been converted and modified for the processing of small-format sheets,
FIG. 2 shows, on an enlarged scale, a longitudinal section through part of the apparatus of FIGS. 1a, 1b,
FIG. 2a shows a side view of a modified embodiment of a constituent part of the part of the apparatus according to FIG. 2,
FIG. 3 shows a front view, in accordance with arrow III, of the part of the apparatus according to FIG. 2,
FIG. 4a shows a schematic and partially simplified view of the part of the apparatus according to FIGS. 2, 3 during a first stage of processing the bundles according to a method of the present invention by means of said apparatus,
FIG. 4b shows, in a representation corresponding to FIG. 4a, a second stage of the method according to the invention,
FIG. 4c shows a third stage of the method according to the invention,
FIG. 4d shows a fourth stage of the method according to the invention,
FIG. 4e shows a fifth stage of the method according to the invention,
FIG. 4f shows a sixth stage of the method according to the invention,
FIG. 5a shows a longitudinal section through a part of the apparatus according to the invention in the first stage of method of processing bundles according to FIG. 4a,
FIG. 5b shows, in a representation corresponding to FIG. 5a, the fourth stage of the method of processing bundles according to FIG. 4d, and
FIG. 6 shows a cross-sect
REFERENCES:
patent: 3635463 (1972-01-01), Stobb
patent: 5101610 (1992-04-01), Honegger
patent: 5497985 (1996-03-01), Byttebier et al.
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