Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...
Patent
1983-07-13
1985-08-13
Spruill, Robert L.
Package making
Methods
Forming a cover adjunct or application of a cover adjunct to...
53137, 531393, 53211, 53419, 53465, 82 47, 82 83, 82 86, 82101, 83187, 493 82, 493342, B65B 1104, B65B 5106, B65B 6100
Patent
active
045341516
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method and an apparatus for packaging paper rolls or the like, comprising the steps of wrapping a wrapper sheet around the roll and securing headers to the roll ends.
BACKGROUND ART
To protect rolls of paper from handling and transport damage, the usual practice is to wrap the rolls with thick paper or board and to cover the roll ends by means of sheets protecting the ends. The package has to protect the roll both against humidity and mechanical damage.
According to the most common prevailing method, the wrapping of paper rolls in paper factories is carried out as follows:
Wrapping paper is wrapped around the paper roll, the width of the paper exceeding the length of the roll. The part of the wrapper extending over the roll ends is pleated inwards toward the centre axis of the roll and folded against the end of the roll so that it at the same time seals in the so called inner header to its place. Hereafter another, outer header is pressed against the outer surface of the the inward bent folds of the wrapper and adhesively secured to the end. A package made this way has, however, been found to be unsatisfactory in some aspects. The part of the wrapper folded against the end is rough and therefore between the wrapper and the header there may remain some channels through which humidity can intrude into the package.
The UK published patent application No. 2004245 discloses another wrapping method in which a header sheet of a size greater than the end surface of the roll is pressed against the roll end face and the parts of the header sheet extending over the end surface are folded against the cylindrical surface of the roll and folded onto said surface. The mantle surface of the roll is wrapped with wrapping material the width of which is approximately the same as the length of the roll and which covers the folded parts of the header. Also this package is susceptible to humidity.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide an improved method for wrapping paper rolls by means of which the deficiencies found in the known art can be eliminated.
The method according to the invention is characterized in that a wrapper sheet the width of which exceeds the axial length of the roll is wrapped around the roll and secured thereto, that the width of the wrapper is reduced to the length of the roll by removing the part of the wrapper sheet extending over the roll ends, that a header sheet bigger than the end surface of the roll is placed against the roll ends, that the size of the header sheets is reduced to that of the diameter of the roll or smaller by removing the part of the header sheet extending over the end surface and that the headers are adhered to the wrapper in such a manner that a tight joint is formed.
The apparatus according to the invention is characterized in that it comprises cutting means provided with shearing and cutting tools to be placed against the roll for removing the edges of the wrapper sheet and the header sheets extending over the roll ends as well as means for feeding the jointing material and securing it to the edges of the wrapper and the headers.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described further in the following with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of a mantle wrapping and cutting means according to the invention;
FIG. 2 is a perspective view of a header sheet cutting and securing means according to the invention;
FIG. 3 is a partial top view of the cutting means of FIG. 2 in a bigger scale;
FIG. 4 is a section of FIG. 3 taken on line A--A; and
FIG. 5 is a section of FIG. 3 taken on line B--B.
DETAILED DESCRIPTION OF THE BEST MODE FOR CARRYING OUT THE INVENTION
In FIG. 1 a wrapper sheet 1 the width of which exceeds the length of a paper roll 2 is wrapped around a paper roll 2. The paper roll rests on two rotatable supporting rolls 3 and 4. The wrapping material is preferably coated with a heat activated layer of adhesive, wher
REFERENCES:
patent: 2368213 (1945-01-01), Gerlach
patent: 3633335 (1972-01-01), Johnson
patent: 4137690 (1979-02-01), Morgan
Schneck Hans
Tiitinen Esko
A. Ahlstrom Osakeyhtio
Mudd Richard M.
Spruill Robert L.
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