 Sound insulating membrane |
| The present invention provides a sound insulating membrane having a thickness less than about 0.150"... |
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| Laminated glass and automobile window |
| In the light of the above problems, it is an object of the present invention to provide a laminated ... |
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| UV shield |
| OF THE INVENTION The composite film 10 is made up of various layers or plies. The part of the film ... |
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| Laminated glass with functional ultra-fine particles and method of producing same |
| What is claimed is: 1. A laminated glass comprising: first and second transparent glass plates; an ... |
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| Infrared (IR) absorbing polyvinyl butyral composition, sheet thereof and laminate containing the same |
| This invention is directed to a polyvinyl butyral composition comprising polyvinyl butyral resin ... |
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| Magnetic container cover |
| In accordance with the present invention, a flexible cover is provided for a container that is not ... |
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| Ring and closure for cans |
| The easily opened containers representing the state of the art today as outlined above exhibit, ... |
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| Reclosable container |
| OF THE PREFERRED EMBODIMENT A conventional packaging carton for products such as cereal and the ... |
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| Box top lid |
| OF THE PREFERRED EMBODIMENTS Turning now descriptively to the drawings, in which like reference ... |
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| Freshness-preserving container |
| It is an object of the present invention to provide a package of the type described above which ... |
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Curl-resistant printing sheet for labels and tags
| Details |
Inventors: Dronzek, Jr., Peter J.; Sedran, Roger H.; Burke, Brian K.;
Assignee: Dronzek, Jr.; Peter J. (Thornwood, NY)
Primary Examiner: Sluby; P. C.
Assistant Examiner:
Attorney, Agent or Firm: Hedman, Gibson & Costigan
Composite pressure sensitive label sheets will print in hot laser printers without curling if they comprise at least three layers: A. at least one base layer having a pressure sensitive adhesive on the bottom face, B. a printable surface layer on top of the base layer or layers, and C. a strippable protective backing on the pressure sensitive adhesive coated bottom face on the base layer or layers and if the thermal expansion or contraction characteristics of the printable layer B and the protective backing C are the same or substantially the same. |
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DETAILED DESCRIPTION OF THE INVENTION Referring more particularly to the drawings, FIG.
1 shows a three-layer sheet 2 including an upper sheet made up of a large number of labels 4 which have been die cut to be separate from one another and which are mounted on backing sheet 6.
As will be seen from FIG.
1A.
, each label comprises printable surface layer 8 alone or on top of base layer 10.
FIG.
2 is a front view of one of the labels 4 which has been removed from the backing sheet 6.
More specifically, on the front of the label 4 as shown in FIG.
2, is some printing or advertising 12, and a bar code configuration 14.
On the back of label 4 is a continuous layer of pressure sensitive adhesive (not shown) of an entirely conventional type well known to those skilled in the art.
There is no need whatsoever to pattern the layer of adhesive into geometric forms as is done in some of the commercial labels in the current state of the art.
FIGS.
3 and 3A show a three-layer label sheet 16 of the present invention, comprising a top sheet 8 and protective backing 6 having the same thermal expansion/contraction characteristics, in which the label sheet 16, following printing, is entirely level and flat.
In FIGS.
4 and 4A, however, it is shown that a three-layer sheet 18 comprising a top sheet 8a and protective backing 6a having substantially different and unbalanced thermal expansion/contraction characteristics on either side of base layer 10, and, following printing in a laser printer, it curls up as indicated, particularly at corners 20.
This curling is found to be so significant that proper stacking of the printed sheet labels is not practical, nor is further mechanical processing of the sheets.
To save unnecessarily detailed description, laser printing apparatus, which are well known, are incorporated by reference to U.
S.
Pat.
Nos.
4,494,129 and 4,913,926, mentioned hereinabove.
In general, all such apparatus use electrostatically chargeable drums to form an image and heated rollers to apply moderately high levels of pressure, e
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Manufacturing Materials 
