Material or article handling – Apparatus for moving intersupporting articles into – within,... – Stack forming apparatus
Patent
1995-08-28
1997-09-23
Bucci, David A.
Material or article handling
Apparatus for moving intersupporting articles into, within,...
Stack forming apparatus
4147895, 4147898, 414790, 4147904, 4147934, 414786, B65G 5703
Patent
active
056697554
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for producing individual stacks of sheets from a downward-directed continuous stream of sheets consisting of consecutive sheets oriented more or less horizontally, with a stack-lifting device, said stack-lifting device comprising a lifting platform and a stack base positioned on the lifting platform: an auxiliary carrying device, said auxiliary carrying device comprising parallel grid rods together forming a rack, said grid rods being displaceable backwards and forwards between a standby position, provided outside the stream of sheets, and a reception position, situated inside the stream of sheets; and a stack-support surface formed on the stack base, said stack-support surface being penetrated by grooves, into which grooves the grid rods are retractable; with the grid rods in the reception position, the auxiliary carrying device temporarily carries a part-quantity of the sheets from the stream of sheets in the form of an auxiliary stack and, while moving the grid rods into their standby position, transfers said part-quantity to the stacklifting device; and wherein further sheets from the stream of sheets build up the auxiliary stack, transferred to the stack base, to form a stack of sheets. Such a device is known, for example, from the Japanese utility-model publication Hei 02-119470 (U), wherein the grooves in the stack-support surface prove advantageous inasmuch as, after the auxiliary stack has been brought down upon the stack-support surface, the rack can be withdrawn from under the auxiliary stack without reaction thereon. This advantage, however, is accompanied by a disadvantage that becomes noticeable particularly in the case of sheets that are of a low weight with reference to their surface area. Said disadvantage consists in the fact that, as the height of the deposited auxiliary stack increases, the grooved carrying portion of the stack-support surface presses into the underside of said auxiliary stack.
The invention is intended to design a device of the above-mentioned kind such that there are no adverse effects on sheets that have been superposed to form a stack of sheets, said adverse effects stemming from the weight of the stack of sheets. The object of the invention is achieved by a device which a receiving plate, catching the auxiliary stack from below, is laid upon the grid rods in their reception position.
With a receiving plate as provided according to the invention, a bottom-most sheet of an auxiliary stack is presented with a flat, closed support surface in the nature of a plate. Consequently, there is no adverse effect owing to the increasing weight of a stack of sheets formed of consecutive sheets, such adverse effect occurring in known devices of the above mentioned kind in that, in such devices, the stack rests on a discontinuous stack-support surface.
The receiving plate can be laid on the grid rods either manually or by means of an automatic device. It is advantageous for the size of the receiving plate to be slightly greater than the size of the sheets of which respective stacks of sheets are formed. It may also be advantageous to coordinate the size of the receiving plate with the maximum size of the sheets that are to be stacked in the device. As for the rest, the dimensioning is coordinated with the material selected for the receiving plate and with the weight of a stack of sheets ultimately resting on the receiving plate.
A first embodiment of a device according to the invention is characterized in that, after transfer of each auxiliary stack to the stack-lifting device, a receiving plate catching the auxiliary stack from below is brought down upon the stack-support surface of an empty waiting stack base.
This embodiment may be advantageously used in those cases in which the sheets of a stack of sheets built up on a flat, closed support surface do not adversely affect each other with increasing stack height. Consequently, a corresponding area of application is provided, for example, by a non-stop stacking device for sheets output from a pri
REFERENCES:
patent: 3231100 (1966-01-01), Faeber
patent: 3938674 (1976-02-01), Kroeze et al.
patent: 3980183 (1976-09-01), Anikanov et al.
patent: 4195963 (1980-04-01), Levkoff et al.
patent: 4255074 (1981-03-01), Meratti et al.
patent: 4269556 (1981-05-01), Martini
patent: 4983096 (1991-01-01), Bodewein
patent: 5024577 (1991-06-01), Miura
patent: 5135351 (1992-08-01), Rathert
patent: 5372472 (1994-12-01), Winski et al.
patent: 5375967 (1994-12-01), Rathert
Patent Abstract of Japan No. JP 1-313258 A (Yamamoto), Dec. 18, 1989.
Bucci David A.
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Hess Douglas
Ierner Herbert L.
LandOfFree
Device for producing individual stacks of sheets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for producing individual stacks of sheets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for producing individual stacks of sheets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1937201