# US 7,608,161 B2 · Method and apparatus for manufacturing pressure sensitive adhesive label stocks with printing under adhesive and product produced thereby

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- Number: US 7,608,161 B2
- Document ID: US7608161B2
- Status: Granted
- Kind: B2
- Application number: 11/519,406
- Filed: 2006-09-12
- Published: 2007-01-11
- Granted: 2009-10-27
- Earliest claimed: 2002-08-01
- Inventors: François Bayzelon; Frédéric La Brie; Daniel Brochu
- Web page: https://patentgrep.com/patent/US7608161B2

## CPC

- B31D 1/027: {involving, marking, printing or coding}
- B31D 1/021: {Making adhesive labels having a multilayered structure, e.g. provided on carrier webs}
- B32B 37/1284: {Application of adhesive}
- G09F 3/10: by an adhesive layer
- B32B 2037/243: {Coating}
- B32B 2519/00: Labels, badges
- Y10T 156/1727: Plural indefinite length or running length workpieces
- Y10T 156/1741: Progressive continuous bonding press [e.g., roll couples]
- Y10T 156/1798: with liquid adhesive or adhesive activator applying means
- Y10T 428/14: Layer or component removable to expose adhesive
- B31D: MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C (manufacture by dry processes of articles made from particles or fibres consisting of wood or other lignocellulosic or like organic material B27N; making layered products not composed wholly of paper or cardboard B32B; making articles from cellulosic fibrous suspensions, e.g. wood pulp, D21J)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method and apparatus for making adhesive-backed labels. Glassine paper stock is unwound from a roll, coated with photo-cationic silicone and exposed to wavelength-controlled illumination to cure. Hot melt adhesive is applied over the silicone. Simultaneously, label stock is fed with the coated glassine paper to laminating rollers where the two are joined. Illumination is provided by a dichroic reflector.

## Claims

### Claim 1

A method of making a continuous strip of laminated printed adhesive labels comprising the steps of:
dereeling a strip of release stock into a first in-feed location in a stock-processing machine having a plurality of spaced-apart workstations to receive and process moving strip stock;
at a first workstation, applying a layer of curable silicone to one surface of the dereeled and in-fed release stock;
at a second workstation, fast-curing the layer of curable silicone;
at a third workstation, applying a hot melt adhesive to the cured silicone layer on the dereeled strip of release stock;
at least partially solidifying the adhesive by cooling over a first cooled roller;
feeding into a second in-feed location separate from the first in-feed location a strip of size-matched, preprinted label stock; and
at a fourth workstation, laminating the label stock strip to the release stock with the printed side of the label stock against and in direct contact with the adhesive;
wherein the step of applying the silicone is carried out with the use of a rubber coating roller that runs with a surface speed faster than the surface speed of the release stock at the point of application and a smoothing roller which runs at a surface speed slower than the surface speed of the release stock at the point of application.

### Claim 2 (depends on 1)

The method of claim 1 including the further step of cooling the laminated label stocks using a second cooled roller located downstream of the first cooled roller in the direction of stock movement.

### Claim 3 (depends on 1)

The method of claim 1 wherein the step of applying the silicone includes the substeps of transferring silicone onto an Anilox roller, thereafter transferring the silicone onto said rubber coating roller and thereafter applying the silicone to the release stock.

### Claim 4 (depends on 1)

The method of claim 1 wherein the step of curing the silicone is carried out photometrically using UV radiation.

### Claim 5 (depends on 4)

The method of claim 4 wherein the step of curing is carried out with the use of a dichroic reflector.

### Claim 6 (depends on 1)

The method of claim 1 wherein the printing on the label stock is on the side which contacts the adhesive layer in the fourth station lamination step.