Stock material or miscellaneous articles – Layer or component removable to expose adhesive
Reexamination Certificate
1998-07-16
2001-07-10
Ahmad, Nasser (Department: 1772)
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
C215S347000, C215S349000, C428S040900, C428S041800, C428S042100, C428S042200
Reexamination Certificate
active
06258425
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a film-type of packaging material for manufacturing forms of packaging or parts thereof, or lidding material for containers, containing at least two layers of material.
2. Background Art
It is known to fill e.g. luxury foodstuffs such as chocolate bars, sweets and other sweet items into e.g. pouches or sweet foodstuffs such as yoghurt, jams, preserved fruit or other creamy dessert foodstuffs including dehydrated pre-prepared foodstuffs and drinks into beakers or glass jars, and to seal the beakers or glass jars with a lidding film. Foodstuffs such as cheese in the form of fresh cheeses, soft cheeses and cheeses for melting etc. may be offered for sale in film pack or in a box. A package in the form of a bag or pouch e.g. for coffee, ready-made soups, confectionery items etc. or an already-lidded glass or beaker may have a strip of material or sealing strip adhesively attached.
BROAD DESCRIPTION OF THE INVENTION
The object of the present invention is to provide a packaging material for manufacturing film-type or box-type packaging or a lidding material for containers, or to provide a packaging material for manufacturing parts of packaging forms such as strips which, in order to increase the attractiveness of products packaged in such a manner, e.g. a competition, or information on the packaging material which is concealed at purchase and is designed to awaken the curiosity of the purchaser. The solution to the competition or the information should be made available to the purchaser only after purchase, and then accessible in a simple manner. The packaging material which is usable in the described manner should be easy to manufacture and easy to use and, in the process of acquiring the information, it should appeal to the playing instinct.
That objective is achieved by way of the invention in that the packaging or lidding material of a package contains the following sequence of material layers:
a) a first layer of material,
b) a printed pattern, the limits of which lie within the dimensions of the package in question or the lid thereof,
c) a dividing layer, the dimensions of which are the same or greater than the printed pattern b) and smaller than the dimensions of the packaging or lid of the package,
d) an adhesive layer covering the whole of the surface,
e) a second layer of material,
where the printed pattern b) can be made visible by lifting the first layer of material a) from the second layer of material e).
DETAILED DESCRIPTION OF THE INVENTION
The packaging or lidding material according to the present invention is in the form of a laminate or composite and is usefully manufactured in the form of sheets or as endless rolls or coils and the individual packaging materials made e.g. into boxes, pouches or sachets by cutting or stamping out etc. and sealing or adhesive bonding these together. The rolls of material may also be processed by cutting or stamping into wraps for small goods or for wrapping items such as cheese, or for boxes etc. The lidding material may be in the form of endless strips or as rolls and by stamping or cutting out, the individual lids may be produced before sealing or bonding onto the container.
The packaging or lidding material features a first layer a) and a second layer e). The first and the second layers contain e.g.—independent of each other—a paper, a plastic monofilm or a plastic composite or a metal foil or a composite of two or more of these materials.
The papers for the layers a) and e) may e.g. be cellulose papers and printing papers made therefrom. It may also be newspaper material, papers for printing illustrations, writing paper, drawing paper, papers for labels and office papers. Preferred are printing papers. These are e.g. papers for relief printing, for printing books or newspapers, papers for surface printing and papers for photogravure printing. Useful are printing papers having a weight per unit area of 18 to 250 g/m
2
. Preferred are papers having a weight per unit area of 18 to 120 g/m
2
. As a rule the papers are unlined papers. The papers may be white or colored. The coloring may be achieved e.g. by through-thickness coloring, by coloring the surface in the gluing press, immersion coloring or surface coloring by brushing. The coloring may be bright or multi-colored. The papers may also be environmentally favourable in their manufacture i.e. made without adding acids such as sulfuric acid, and/or chlorine-bleaching. It is also possible to use recycled paper. Apart from the papers mentioned it is also possible to use papers made from synthetic fibers. Security paper containing security chemicals or threads or fibers may also be used. If desired the papers may be coated and/or laminated e.g. by coating methods such as extrusion coating, dispersion coating and organic coating. The coating may be an organic coating, a wax, paraffin or a hot-melt coating. A laminating process may be employed to join e.g. a strip of paper to a pre-made plastic film. Other processes that may be used are methods of coating from the vapor phase in vacuum (chemical vapour deposition or physical deposition).
The monofilms of plastics or film composites may be made of or contain thermoplastics based on polyesters, polyamides, polyolefins, polystyrols, polyvinylchloride, polycarbonates or from viscose etc.
Suitable polyesters are e.g. polyalkylene-terephthalates such as polyethylene-terephthalate, or the polyethylene-terephthalates known as A-PET, PETP, PETG or G-PET. Preferred thicknesses are 6 to 50 &mgr;m, in particular 10 to 36 &mgr;m or 12 &mgr;m.
Polyamides are e.g. polyamide 6 and 6.6; polyamide 11; polyamide 12; polyamide 6.12; polyamide 6-3-T etc.
Polyolefins are e.g. polyethylenes such as polyethylenes of low, medium or high density, linear polyethylenes of low, medium or high density, such as amorphous, crystalline or highly crystalline polypropylene, oriented polypropylene or mixtures containing the above mentioned polyolefins. Preferred thicknesses for polypropylenes are 6 to 50 &mgr;m, in particular 10 to 36 &mgr;m or 20 &mgr;m.
Examples of polystyroles are thermoplastic polystyrole, copolymers and polyblends of styrole such as styrole/acrylnitrile-copolymers or styrole/butadiene-grafted polymers etc.
The above mentioned films of thermoplastics are employed in thicknesses e.g. of 6 to 200 &mgr;m, usefully 10 to 100 &mgr;m and, in the absence of any other specification, preferably from 20 to 80 &mgr;m.
The films of the above mentioned thermoplastics may be non-stretched or axially or biaxially stretched. The films may also contain filler materials such as talcum, glass, quartz, mica, chalk, barium sulfate, zinc oxide, titanium oxide etc. in amounts of e.g. 2 to 60 wt. %.
By cellulose is understood e.g. regenerated cellulose, so called cellulose hydrate, also known as cellophane. The cellulose films are e.g. 8 to 200 &mgr;m thick.
The above mentioned thermoplastics may also be laminate coated in some cases with bonding agents and laminating adhesives or by coextrusion etc. to form plastic film composites containing two, three or more monofilms. The plastic composites may be e.g. 16 to 200 &mgr;m thick.
The plastics may be transparent, translucent or opaque and non-colored, have colored surfaces or be colored through.
The metal foil is e.g. an aluminum, iron or steel foil, aluminum foil being preferred. The aluminum foil may be of pure aluminum or of an AlFeMn aluminum alloy such as AlFe1.5Mn, AlFeSi or AlFeSiMn, for example having a purity of 99.7% and higher, preferably 98.5% and higher. The metal foil may be e.g. 6 to 100 &mgr;m thick, preferably 6 to 60 &mgr;m.
For the layers a) and e) it is also possible to employ—independent of each other—multilayer composites containing the mentioned papers, plastic films, plastic composites, papers or plastic films or composites that are metallized on one or both sides, and/or metal foils.
The papers and plastics or multilayer composites made therefrom for layers a) and e) may be metallized i.e. exhibit metallic coatin
Gribling Raymond
Marbler Claude A.
Parmentier Rene
Weber Grégoire
Ahmad Nasser
Alusuisse Technology & Management Ltd.
Fisher Christen & Sabol
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