Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Means joining flexible indefinite length or endless bodies...
Patent
1980-10-21
1982-12-14
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Means joining flexible indefinite length or endless bodies...
156505, 242 584, 242 585, B31F 506, B65H 1918
Patent
active
043636950
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
(i) Field to which the invention relates
The present invention is with respect to an automatic reel change system for use in connection with the processing of a web, coming from one reel in a reel support, the web being sheeted in a transverse cutter.
(ii) The prior art
German Pat. No. 2,010,467 has an account of a system for processing a web which is sheeted in a transverse cutter and is taken from a reel. In this prior art system, the reel support is only designed for one reel at a time. When the reel has run to an end, an new reel has to be placed in position and the web threaded in again, a complex and time-taking operation causing drop-outs in production and generally increasing the running costs of the plant.
In the web-feed, rotary press art automatic reel change makes continuous operation possible. In old systems of this sort (see for example German Offenlegungsschrift specifications Nos. 2,246,360 and 2,331,125) a "reel" (short for reel stand) is used for supporting a number of reels at the time and having a frame with a horizontal axle with spokes radiating from the hub near each end and horizontal bars or slats connecting these in pairs. When stock is running to an end on one reel, the next, new reel is speeded up to the running speed by a separate driving unit. For joining the web, which is coming to an end on the old reel to the next web, taken from the new reel, the old web is pressed against the new reel and joined to it by paste placed in the space between the webs or present on one of them. After joining the old web is cut out. In system of this sort, it will be seen that there is a generally long overlap, in which the web will have twice its normal thickness. In web-feed presses, such a thicker part of the web may be put up with, but this is not so with sheet-feed presses which are much more likely to be damaged. For this reason, the overlapped web part has to be taken out of the flow of stock through the system using parts for sensing its position; however, the flow of stock is then interrupted and, necessarily, production is stopped and has to be started again. This would seem to be the reason why, so far, sheet-feed machines using webs (that is to say having a sheeter-feeder) have not been designed for automatic reel change.
SHORT OUTLINE OF THE INVENTION
One purpose of the present invention is that of designing, for the first time, a system of the sort noted, which is not only simple in design, but furthermore makes certain of trouble-free operation and, at the same time, while making certain of a safe web join, is only responsible for a very narrow thickened part of the web.
For effecting this purpose in the present invention, the reel stand has supports for at least two reels, from which, on reel changing, a double web made up of old web (web coming to an end) and new web (web from the new reel) may be taken, and near the path of the web, a cutting station is present, able to be put into operation for cutting through the double web, a joining station, able to be put into operation the necessary time after operation of the cutting station, for joining the end, produced on a cutting operation, of the old web with the leading edge, produced on the cutting operation, of the new web, using an adhesive strip overlapping the ends as a joint, and an advancing unit is placed before the cutting station, said advancing unit being designed for the double web to be run through it and being put into operation at least between the cutting and joining operation, and in that furthermore, near the joining station for the new and old webs, pulling parts, able to be put into operation separately, are present, which are designed for taking effect on the front end of the cut off run, placed in front of and after the position of cutting, of the web in question.
Because, in this respect, the two webs are cut in common generally at the same point or position, the end edges are, with a useful effect, right up against each other so that the joint may simply be made by way of a
REFERENCES:
patent: 3549458 (1970-12-01), Osta
patent: 3717057 (1973-02-01), Takimoto
patent: 3749634 (1973-07-01), Krause
patent: 3939031 (1976-02-01), Takimoto
patent: 4067760 (1978-01-01), Nelson
Collard Allison C.
Galgano Thomas M.
Georg Spiess GmbH
Wityshyn Michael G.
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