Manufacturing container or tube from paper; or other manufacturi – Control means energized in response to activator stimulated... – Responsive to work material – the product or means engaging...
Reexamination Certificate
1999-10-14
2001-08-28
Vo, Peter (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Control means energized in response to activator stimulated...
Responsive to work material, the product or means engaging...
C493S020000, C493S248000, C493S436000, C493S455000, C493S476000, C493S910000
Reexamination Certificate
active
06280372
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a process and apparatus for preparing material webs made of packaging material in conjunction with the production of (cigarette) packs, it being the case that the blanks which are severed from the material web have at least one fold, in particular a Z-shaped fold—Z-fold—which extends within the material web, in the longitudinal direction of the same, and/or a border-side, double-layered region formed by virtue of a border strip being folded over.
The invention is concerned with the handling of comparatively thin packaging material such as paper, film or the like, for producing, in particular, cigarette packs of the soft-pack type.
For specifically configured packs of this type, the blank needs to be prepared by having folds provided.
These folds are produced in the region of the continuous material web, with the result that the blanks which are severed from the material web already have the folds. For a prime example, as far as the configuration of the packs is concerned, you are referred to U.S. Pat. No. 5,762,186. In the case of this type of pack, a double-layered fold running all the way round, namely a Z-fold, is provided in the top region, adjacent to an end wall. Furthermore, folding tabs may be formed in a double-layered manner in the region of a base wall, to be precise by a folded-over border strip formed over the length of the blank. These folds are intended to be produced in the region of the material web.
SUMMARY OF THE INVENTION
The object of the invention is to propose measures which ensure that folds are provided effectively in the region of material web in a reliable manner by way of straightforward auxiliary means, to be precise with a high packaging-machine output.
In order to achieve this object according to the invention, the folds are provided in the material web in the region between two retaining positions, in particular between two spaced-apart deflecting rollers, a conveying and shaping section for the material web being formed between said fixed points and, from one fixed point to the other, said material web being transferred gradually from a planar, non-folded position into the folded position.
The invention is based on the finding that the thin-walled packaging material, which can easily be shaped, performs an automatic shaping process along a conveying and shaping section if, at the end of the latter, the folded position is fixed. Most suitable for this purpose are deflecting rollers or roller pairs which have the folded material web guided over their lateral surface for the purpose of stabilizing the folding.
According to a further proposal of the invention, there is installed, in the region of the shaping section of the material web, a shaping subassembly through which the material web is directed. The shaping subassembly has shaping and guide elements which are positioned in a stationary manner and on which the material web is directed, the folding being carried out and/or completed in the process. It is provided that, as far as the entry into the shaping subassembly, the material web is deformed, lateral legs being rendered gradually upright, and the folding continues in the region of the shaping subassembly.
Following the shaping subassembly, the material web is directed over rollers which use pressure to stabilize the folding produced.
The apparatus according to the invention is coupled to a packaging machine, preferably to a packaging machine producing soft packs. The apparatus is arranged such that the material web, for producing the blanks, can be fed to a blank subassembly alternatively with or without folds.
REFERENCES:
patent: 3646415 (1972-04-01), Hook
patent: 3868892 (1975-03-01), Winnemoller
patent: 4016808 (1977-04-01), Young
patent: 4508218 (1985-04-01), Focke et al.
patent: 5151073 (1992-09-01), Focke
patent: 5292301 (1994-03-01), Focke
patent: 5762186 (1998-06-01), Focke et al.
patent: 5820540 (1998-10-01), Bohn et al.
patent: 5970682 (1999-10-01), Focke et al.
patent: 2038959 (1974-03-01), None
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patent: 2 219 244 (1989-12-01), None
Bretthauer Hans-Jurgen
Focke Heinz
Desai Hemant M.
Focke & Co. (GmbH & Co.)
Sughrue Mion Zinn Macpeak & Seas, PLLC
Vo Peter
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