Coating processes – Interior of hollow article coating – Rotating the article
Reexamination Certificate
1999-04-22
2001-05-01
Beck, Shrive (Department: 1762)
Coating processes
Interior of hollow article coating
Rotating the article
C427S230000, C427S235000, C427S238000, C118S408000, C118S409000, C118S410000, C118S503000
Reexamination Certificate
active
06224940
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a method of manufacturing coated sleeves, a device for its execution and products comprising sleeves coated according to the present method.
BACKGROUND OF THE INVENTION
Many office and writing products, food packaging etc are manufactured from plastic or metal or combinations of these materials. With the increase in environmental awareness over a number of years, there is a desire to be able to use instead renewable raw material containing for example cellulose, such as cardboard and paper, for example in pens, sleeves for glue sticks, containers for correction fluid, sleeves for various foodstuffs etc. One problem, however, is that cardboard absorbs and/or lets through liquid if it is not protected against the liquid or treated in a suitable manner. It is relatively common to provide pens for example with an outer sleeve of cardboard, in which however the inner ink container is still of plastic or metal. To the eye this perhaps appears to be environmentally friendly, but is not so in practice. Other attempts have been made to utilize cardboard or paper by coating a sheet of paper with a liquid-proofing plastic layer, the sheet then being wound round several turns in the form of a sleeve, so that a cylindrical space is formed. A disadvantage of this method is that the material in the sleeve becomes impossible to recycle. It would in fact also be possible to dip a cardboard tube into a fluid, which on drying/solidifying produced a liquid-proofing film. The problem then is that it is difficult to apply text and other print to the outside of the sleeve. As far as the inventor knows, no method has been developed for the manufacture of cardboard sleeves or similar items which are coated on the inside only with a liquid-proofing film of a type other than plastic.
BRIEF DESCRIPTION OF THE INVENTION
The object of the present invention is to remedy the above complex problems and provide sleeves of renewable raw materials such as cardboard, coated with a liquid-proofing film on the inside which is not composed of plastic or metal, intended to be capable of being used in marker pens, glue sticks and other similar office and writing products and as food packaging.
This object is achieved according to an aspect of the invention by a method and a device characterized by the characterizing part of the claims.
REFERENCES:
patent: 4101623 (1978-07-01), Webster et al.
patent: 4107254 (1978-08-01), Webster et al.
patent: 4496502 (1985-01-01), Kutowy et al.
patent: 5141774 (1992-08-01), Prittinen et al.
patent: 5456940 (1995-10-01), Funderburk
patent: 5855676 (1999-01-01), Lu et al.
patent: 26 36 203 A1 (1976-08-01), None
patent: 40 25 199 A1 (1990-08-01), None
patent: 0 400 567 A2 (1990-05-01), None
patent: 0 466 147 A1 (1991-07-01), None
“Apparatus for Coating Inner Surface of Cylinder”, Translation of Japanese Patent Abstract, Appl. No. 61-175152, filed Jul. 25, 1986.
International Search Report for PCT/SE 97/01500, dated Dec. 17, 1997.
Karlsson Ulf
Sjoholm Soren
Beck Shrive
Crockford Kirsten A.
Kilpatrick & Stockton LLP
ULF Karlsson
LandOfFree
Method and apparatus for coating sleeves and products... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for coating sleeves and products..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for coating sleeves and products... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2526289