Method for wrapping a roll, particularly a paper roll, in an ela

Details Method for wrapping a roll, particularly a paper roll, in an ela Method for wrapping a roll, particularly a paper roll, in an ela

1994-01-28

1995-12-12

Sipos, John

Package making

Methods

Wrapping contents including cover forming

53211, 53587, B65B 1100

Patent

active

054738636

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a method for wrapping a roll, particularly a paper roll, in a continuous wrapper of elastic material such as a paper web wrapper or plastic film, in which method the wrapper material is wrapped about the roll by rotating the roll, and further, in which method the wrapper material is tensioned by means of a braking arrangement adapted to the essentially immediate vicinity of roll.


BACKGROUND OF THE INVENTION

Paper rolls, later referred to simply as rolls, are wrapped in an elastic packaging wrapper, typically a kraftliner or plastic film web, or both. Also conventional is the use of such a wrapper material in which the above-mentioned material elements are laminated together so as to form a so-called "sandwich" wrapper material. The function of the plastic film in the roll wrapper is to provide a moisture barrier for protecting the rolls against ambient humidity, while the kraftliner imparts the required mechanical impact protection during transportation and handling of the rolls as the rolls are, e.g., loaded by clamp lift trucks in the various stages of the shipping process.
For the mechanical handling durability of the packaged roll it is imperative that the wrapper material is applied slacklessly about the roll and it has no "creases" that can initiate a damage in the package through, e.g., sticking of the lift forks in the creases or rubbing of the rolls against each other during transportation. Furthermore, the creases can cause impression marking of the paper web in the roll.
Typically, the paper roll is wrapped in an elastic wrapper material by rotating the paper roll on support rolls and feeding the wrapper as a continuous web by means of a feed nip and conveyors and/or gravitationally into the nip formed between the paper roll and the support rolls, and the leading end of the wrapper is attached to the paper roll, conventionally by adhesive means.
During wrapping, the wrapper is tensioned between the wrapping station and the wrapper feed units in order to obtain a tightly wrapped roll. The wrapper tension is adjusted by controlling the mutual speed difference of the wrapping rolls and the feed nip, and/or braking the rotational speed of the wrapper dispenser unit.
The wrapper material is typically wound by 2 . . . 4 layers about the paper roll, severed by conventional methods and the layers are glued to each other at least at the wrapper trailing end, thus sealing the packaged roll. Finally, the overextending edges of the wrapper are folded with the help of a folding apparatus and the paper roll ends are covered by end headers.
During the wrapping of paper rolls, the wrapper frequently develops creases at which the package is easily severed during handling of the rolls. This problem is accentuated the wider the rolls are. Roll wrappers are often printed with factory logotypes, thus also acting as factory "visiting cards". A creased roll wrapper also looks ugly and thereby acts as bad advertising for the product and factory image.
The above-discussed problem of crease formation originates from the feed of the wrapper leading end into the nip formed between the roll to be wrapped and the rotating support roll, and therefrom further about the roll. The wrapper leading end is cut transversely to the feed direction and frequently is warped on the wrapper payoff roll, thus also easily assuming a warped state when entering the first feed elements. Owing to the above-mentioned warping and bending of the wrapper, the feed of the wrapper leading end by pushing it from behind into the nip between the roll to be wrapped and the rotating support roll is difficult, whereby the wrapper leading end readily enters the nip between the roll to be wrapped and the rotating support rolls in a slightly oblique direction relative to the axial direction of the roll. Moreover, the roll resting on the support rolls also frequently assumes a somewhat axially misaligned position, which further is the origin of the problem described below in greater detail. During the

REFERENCES:
patent: 2737089 (1956-03-01), Baumgartner
patent: 2900143 (1959-08-01), Bandy et al.
patent: 3290861 (1966-12-01), Prager
patent: 3494095 (1970-02-01), Valvano
patent: 3716964 (1973-02-01), Reynolds et al.
patent: 3755861 (1973-09-01), Castro et al.
patent: 4608807 (1986-09-01), Skripalle
patent: 5161349 (1992-11-01), Lancaster, III et al.
patent: 5203144 (1993-04-01), Gambetti

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