Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Patent
1989-05-31
1991-02-26
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
156324, 156554, B32B 3104, B21F 500, B65C 925, C09J 500
Patent
active
049959379
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for applying relatively narrow tapes or strips onto a moving material web in the direction of its length and particularly, but not exclusively, to an arrangement for applying self-adhesive tear tapes, or tear strips, to a moving paper web or a moving web of corrugated fibreboard, the arrangement being of the kind which incorporates a plurality of holders for supporting a respective tape store and a plurality of tape applicators for guiding a respective tape arriving from a tape store to a location in which the tape is in contact with the web, and of the kind in which tape-supply holders and said applicators along a beam structure which extends transversely to the direction of web travel.
When producing, e.g., webs of corrugated paperboard of fibreboard which are to be divided subsequently into blanks for forming packages, it is usual to apply tapes, which ultimately form tear tapes on the finished packages, onto the moving webs before the webs are divided into package blanks. Normally, each tape applicator and at least one tape-supply holder associated therewith can be displaced along a stationary transverse beam by means of a separate positioning device, and can be locked in relation to said beam. One drawback with this arrangement, however, is that if the web wanders laterally off course, the tapes will be positioned at varying distances from an edge of the web and therewith at varying distance from those edges of the finished package blanks which extend parallel with said web edge, which can result in the tapes being positioned wrongly on the finished package blanks to an extent which cannot be accpeted. It is not possible in practice to move the tape applicators along the stationary beam in response to this lateral wandering of the web. When switching from package blanks of one configuration to another or from one size to another, it is necessary normally to change the number of tapes and their positions relative to the transverse direction of the web. This change should be made in the shortest time possible and with high precision, in order to minimize production losses and also the number of rejects obtained. Similarly, when the tape supply is exhausted, it must be possible to replace the empty tape supply means with a full tape supply rapidly while the machine is in operation, therewith to minimize the occurence of rejects. The aforedescribed also applies when applying tapes, strips, or strings to a moving web for strengthening or decorating purposes.
One object of the present invention is to provide a novel and useful arrangement which greatly facilitates the aforesaid positioning and repositioning of the tape applicators and also the replacement of tape stores, such that the aforesaid problems and needs associated with conventional tape applying arrangements can be more readily resolved or satisfied.
To this end it is proposed in accordance with the present invention that in a tape applying arrangement of the kind described in the introduction the tape applicators can be adjusted positionally in relation to an applicator-setting beam which extends transversely to the direction of web movement, and can be locked to said beam in selected positions therealong, said beam preferably being provided with graduations therealong, and wherein the applicator-setting beam is, in turn, carried for movement in the direction of its length by a stationary carrier beam which extends parallel therewith. This arrangement affords the advantage that the tape applicators can be moved in unison across the web, e.g. so as to be positioned in given relationship with one edge of the web, and that only small forces are needed for this movement, since the applicator-setting beam does not carry the tape applicators. Furthermore, when the tape applicators are not locked to the applicator-setting beam, the applicators can be moved freely along the carrier beam and the preferably graduated applicator-setting beam to a desired new position along the applicator-setting beam irrespect
REFERENCES:
patent: 2739512 (1956-03-01), Conti
patent: 2788079 (1957-04-01), Allison
patent: 3179023 (1965-04-01), Hoff
patent: 3303758 (1967-02-01), Holt
patent: 3566752 (1971-03-01), Dreher
patent: 4498274 (1985-02-01), Vorhauer
Forenade Well AB
Powell William A.
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