Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1986-12-23
1987-12-08
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 65, 242 74, 242 76, 83636, 226 97, B65H 1926
Patent
active
047114045
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for cutting a paper web, which is wound in a drum reel-up, by means of a transverse strip means or the like forming a free wedge-shaped end of the moving paper web which is passed around a new reeling drum driven by a surface winding drum.
A number of different apparatuses and methods have previously been suggested for severing and at the same time point cut a paper web when changing reeling drums in a drum reel-up. In one method one or more cutting tools such as knives are used to effect a slit in the paper web running obliquely from one edge to the other, or two slits extending from the middle of the paper web and running obliquely out to each side edge. Examples of this method are described in U.S. Pat. Nos. 3,857,524, 3,889,892, 4,111,377 and 4,444,362.
In another method the paper web is caused to form a ballooned portion or a fold which is inserted between a nip defined by a new reeling drum and the surface winding drum, so that the paper web is torn off close to the finished paper reel. Examples of this method are described in U.S. Pat. Nos. 3,743,199 and 4,146,187.
It is also generally known manually to insert one end of a long ribbon or strip of paper, for instance, into the nip between a new reeling drum and the surface winding drum at a place located at the side of the paper web. The strip of paper has a specific length and is normally placed on the floor in front of the surface winding drum. The end of the strip to be inserted has on its upper surface a binder such as a layer of glue or adhesive tape ensuring that the strip becomes attached to the reeling drum as desired. Since the strip is placed transversely to the paper web, when its one end is inserted into the nip it will be wound helically onto the new reeling drum, and at the same time it effects a slit from one edge of the paper web to the other. The leading wedge of paper web thus formed, i.e. seen in the direction of feed, is guided around the new reeling drum. The manual phase, i.e. insertion of the strip end into the nip, is extremely hazardous since the strip is jerked into the nip at extremely high speed. The operator must therefore make sure he does not come too close to the nip with his hand, and he must also quickly let the strip go and snatch away his hand and body in order to be free from the strip so as not to become entangled in it when the strip is quickly jerked up from the floor into the nip. This risk increases with increased speed of the paper web and the method cannot therefore be used for higher web speeds, e.g. 700 meters per minute and above. The risk also increases if there is a small space under the paper web permitting only creeping.
U.S. Pat. No. 3,847,390 describes a conveying device consisting of an elongated straight conduit provided with a narrow slot running longitudinally so that one edge of a paper web can run in the conduit under the influence of air jets directed towards both sides of this edge inside the conduit.
The object of the present invention is thus to provide a simple and reliable apparatus for automatically feeding and inserting a length of strip into the nip between the new reeling drum and the surface winding drum in order to eliminate the manual work and thus the serious risks to the operator in conjunction with inserting the strip into said nip.
Another object of the invention is to reduce the length of the portion of paper web affected by cutting and to reduce the length of strip required for this operation. This results in fewer turns of strip on the reeling drum and a corresponding reduction in pleating of the paper web which causes considerable rejection of paper web.
The apparatus of the present invention is characterized in that it comprises a conveying channel having a longitudinal, relatively wide aperture facing the surface winding drum, a first portion of the conveying channel being positioned below the paper web and a second curved portion of the conveying channel extending to the vicinity of a nip defined by the surface winding drum
REFERENCES:
patent: 2461246 (1949-02-01), Weyenberg
patent: 3765615 (1973-10-01), Brink et al.
patent: 3847390 (1974-11-01), Dixon
patent: 4414258 (1983-11-01), Corbin, Sr.
patent: 4659029 (1987-04-01), Rodriguez
Jillions John M.
Valmet-KMW Aktiebolag
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