Package making – Methods – Closing package or filled receptacle
Patent
1997-08-06
1999-07-13
Coan, James F.
Package making
Methods
Closing package or filled receptacle
533758, 493351, 493392, B65B 5109
Patent
active
059210664
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
In a first aspect this invention relates to a wrapped pulp bale of the kind which, apart from a proper bale, comprises a wrapping or cover of paper which envelopes the same and which is folded along opposite faces of the bale while forming overlapping parts in which the paper lies in two or more layers on top of each other, the wrapping being provided with means to keep the same against the bale.
PRIOR ART
A usual method for ensuring the keeping of paper covers on pulp bales is to put at least one single steel wire around the individual bale and the cover arranged outside the same, more precisely in such a way that the wire surrounds and braces the very parts of the paper which are folded towards opposite faces of the bale and overlap each other, so that these parts cannot be removed from the faces of the bale. This method is, however, in practice expensive and complicates the process of transporting the bales from the pulp mill to the paper mill, particularly the shredder thereof. Thus, the actual consumption of steel wire causes an inevitable and for every bale repeatedly occurring material cost falling upon the pulp producer. Furthermore, when the bales arrive to the paper mill, the wire has to be removed from the bales before these can be fed into the shredder in question. This calls for a special, mechanical wire-cutting equipment, as well as a particular post-handling of the wire scrap which is left after cutting.
With the purpose of getting away from the use of steel wire, which is price rising in many respects, attempts have been made to keep the paper cover on pulp bales by means of adhesives. Thus, WO91/10594 discloses a packing machine which, in addition to the necessary paper-folding components, comprises a number of adhesive sprayers by means of which the overlapping parts of the paper cover can be internally sprayed with adhesives, which after a certain time of binding (during which special clamp devices hold the overlapping parts pressed to the bale) gives a holding adhesive joint which is able to replace the steel wires. A serious disadvantage of this method is, however, that adhesives represent an extraneous component when the wrapped pulp bales are later on received in the paper mill and in their entirety, that is including the paper cover, defibrated to be taken out in form of a beater to the paper making machine. The paper maker is therefore moderately inclined to directly use such wrapped pulp bales with adhesive-mixed paper covers. The alternative is to remove the paper covers before tearing the bale, but this would in turn imply a bad utilization of the raw material of fibre available in the paper cover itself. In addition, the adhesive is an article of consumption which in itself entails a non-negligible material cost. Another disadvantage is the fact that adhesives require a considerable time to set; something which may create a bottleneck in the packaging line of the pulp mill.
OBJECTS AND FEATURES OF THE INVENTION
The present invention aims at removing the above-mentioned disadvantages of the previously known technique and at creating a wrapped pulp bale which without detriment can be directly used in the paper mill. Thus, a primary object of the invention in a first aspect is to create a wrapped pulp bale the paper cover of which is kept reliably in place without such additional means as adhesives or steel wires. More precisely, the paper cover should be held by using holding means of a mechanical nature included in the cover itself, which means can be produced in an easy and effective way and which do not require any handling at all in the paper mill.
According to the invention, at least the primary object thereof is attained by the features defined in the characterizing clause of claim 1.
In a second aspect, the invention also aims at achieving a bale wrapping method by means of which wrapped pulp bales can be produced in a quick, effective and inexpensive way. The features of this method are defined in claim 4.
In a third aspect, the in
REFERENCES:
patent: 1009644 (1911-11-01), Bump
patent: 1487079 (1924-03-01), Stillwagon
patent: 3040473 (1962-06-01), Wetzler
patent: 3792563 (1974-02-01), Mercer et al.
patent: 5024643 (1991-06-01), Kastner
Ikalainen Siinto
Olsson Kaj-Ove
Coan James F.
Siemens Terrance L.
LandOfFree
Wrapped pulp bale, method for wrapping a pulp bale and punching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wrapped pulp bale, method for wrapping a pulp bale and punching , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wrapped pulp bale, method for wrapping a pulp bale and punching will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2266077