DE2315779A1 - POSTAL AND BUSINESS STAMPS - Google Patents

Description

PATENT ADVOCATE BORO TEL (0611) 539653-56 TELEX: 524 845 ti pat CABLE ADDRESS: Germaniapatent Munich

8000 Munich 2

Bavariaring 4

P.O. Box 202403 March 29, 1973

Nelson Jarvis Waterbury Palm Beach, Florida (USA)

Postal and business brands

The invention relates to a postage or postage stamp (stamps customary in trade).

So far, such stamps have generally been provided with an adhesive backing to attach the stamps to letters, Parcels, books, etc. provided. The adhesive backing coating is normally activated with water, e.g. by leaking, to make the brand sticky. However, if a large number of marks are to be applied, for example on a series of envelopes, continuous licking of the various brands is a tedious and tentative Occurrence. Also, brand licking can be aesthetically objectionable. Furthermore, different bacteria can, which can be dangerous for the health of the user

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of the adhesive backing on the mark and be absorbed into the bloodstream of the user. Furthermore Many stamps from a stamp collector cannot Easily removed from envelopes with or without tearing that the risk is taken to brand the> in a way too harm that the value of the mark is impaired.

There are several types of closing techniques known from envelopes that use pressure-sensitive adhesives come to use without the need for licking. In such cases, the closure flap part is generally soxirole as well as the main part (body) of the envelope are provided with coatings of self-adhesive material. Here After folding over the flap, the two opposite adhesive-containing parts of the envelope are brought together and then pressed together to form a sealed connection. However, these measures require the Coating of two surfaces. Furthermore, this mode of operation requires considerable adjustment of the two coated surfaces to make a mating connection. In addition, if the coated surfaces become damp, the formation of seal-tight joints can be impaired or be excluded.

The object of the invention is to overcome the disadvantages mentioned, to overcome.

The subject of the invention is a post or 309841/04 6.7

Business mark containing microencapsulated material attached to the back by a non-tacky binder, the microcapsules being adapted to break when the tag is pressed against a receiving surface resulting in the formation of an adhesive between the back and the receiving surface.

The microcapsules can contain an adhesive or, according to a further embodiment, contain a solvent or other active material which activates the binder or a component thereof in order to produce the adhesive. Preferably, the capsules have a crush strength within the range of 1.0 to 7 kg / cm (20 to 100 psi) and the microcapsules can have a diameter of 5 to 100 p. to have.

It is an important preferred feature that the dried coating be non-toxic to binders and microcapsules. Preferably the ingredients of the microcapsules are also non-toxic.

The adhesive _s which is formed in situ on the back of the token can generally speaking be of any suitable material, but four types of materials should be cited as useful examples as follows:

1. Water-based rubbers, e.g. as usual 309841/0467

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used on trademarks. In "this case the glue can be provided." encapsulated - contain water or, for example, an aqueous alcoholic solvent.

2. Adhesive based on an elastomer, which, for example, neoprene, Ndtril rubber or SBR rubber may contain. In this case the solvent, which can be encapsulated, is preferably a hydrocarbon, like petrol or toluene. Halogenated hydrocarbons are useful solvents, but for reasons of toxicity to avoid if possible. .

3. An acrylic resin such as polymethyl methacrylate, polybutyl methacrylate or methyl methacrylate-butyl methacrylate copolymer. In this case the solvent, which can be encapsulated, can be an aromatic hydrocarbon such as toluene, xylene or white spirit. "The latter usually has an aromatic content of around 17 %. *

4. A vinyl resin such as polyvinyl acetate or polyvinyl butyral. In this case the solvent, which in turn can be encapsulated, can contain an alcohol, ester or ketone.

In all cases, the polymeric base of the adhesive can be used together with a solvent and - if necessary - A plasticizer can be used in the microcapsules, or only the solvent can be used in the microcapsules

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be included, and the polymeric base can be included in the binder or form the binder which the Holds microcapsules on the back of the brand.

The preferred materials for the adhesives are the acrylic resins, especially polybutyl methacrylate. Suitable adhesive compositions, including solvent, are, for example, those sold by Vinyl Products Limited under the trade names Vinalaks 5324, 5620, 5911 and 5920. Of these, 5324 contains polymethyl methacrylate and toluene and has a non-volatile content of 39 to 41 %. 5620 contains methyl methacrylate-butyl methacrylate mixed polymer together with toluene and has a non-volatile content of 49 to 51 % * 59II (which is preferred) contains polybutyl methacrylate together with turpentine substitute (aromatic content 17%) and has a non-volatile content of 49 to 51 £. 5920 contains polybutyl methacrylate along with xylene and has a non-volatile content of 49 to 51 pounds. Polymethacrylate emulsions, such as those sold by the same Krma under the trade name Vinacryls 4260 and 4290 and which are each based on poly-2-ethoxyethyl methacrylate or polybutyl methacrylate, are also suitable. Such emulsions are suitable for complete encapsulation and adhesion with the aid of a non-active binder.

If a non-active binder is used together with a full 309841/0467

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Constantly encapsulated adhesive can be used Binder of any suitable material, which results in a non-sticky surface. It is often useful Use some water-based glue in the binder, leaving the mark by licking or alternatively can be glued by pressure.

The aforementioned Vinalak resins should It, Notification according to Article 121.2520, Adhesives, the Food & Drug Administration (USA Code of Federal Regulations, subsection F, under the conditions made herein, after once the solvent has evaporated).

The encapsulation material can be any for encapsulation purposes be known material. So are suitable materials Gelatin and gum arabic. However, it is preferred to use a fully thermosetting resin such as Kamstoff formaldehyde, which is inert to a large number of materials. This is how urea-formaldehyde microcapsules are in carbon free copy paper manufactured by Minnesota Mining & Manufacturing Corporation, and suitable encapsulation methods are described in various patent applications and described in the literature of this company. Microencapsulation is a well known technique and is therefore used herein Context not described. Numerous patent applications describe this technique, particularly those of Minnesota Mining & Manufacturing Corporation and also the National Cash Register Company, e.g., U.S. Patent

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3,472,675, which contains numerous references to earlier patents contains, in which microencapsulation techniques are described. Of course, in those cases where water-soluble material, how gelatin or gum arabic is used for the capsule, non-aqueous or otherwise to the encapsulating material be inert.

In use, the mark is placed on a letter or other basis, such as a page in a stamp album in position, and then pressure is applied to the stamp ', for example by a finger or Thumb upset. The microcapsules will then break, releasing their ingredients, which is a more complete one Can be glue or a solvent, which the binder on the back of the stamp activated to it so to bring it into action and generate the adhesive in situ. The stamp will appear on the envelope or another Base attached,

The microcapsules, if desired together with the binder, can be applied as a full coating on the back of the stamp or in separate areas, such as the corners of the mark or in a cross pattern. If desired, the binder and the microcapsules can be continuous discontinuous in remote regions.

When making the mark, the first thing to do is print 309841/0467

Stage to be carried out before the microcapsules and the binder can be applied. A preferred technique is to mark the back of the mark, which is preferably is part of a continuously perforated face, with a dispersion of the microcapsules and the binder together spray with a solvent. The coating is allowed to dry. When applied in discontinued If sections are desired, the spraying can take place through a suitable stencil. The microcapsules can also be sprayed or sprinkled on the binder in the form of a powder while the binder is still liquid and sticky,

If desired, the microcapsules contain other components, such as a lacquer, which is released after breakage is used to impregnate the stamp, e.g. as a postmark when pressure is applied. Lacquer microcapsules can if desired be applied to the front of the mark, for example in a suitable pattern or in the form of alpha numbering.

The microcapsules can be produced with a fill content of about 75 % .

ι
The invention avoids all dangers

which are normally present when licking marks, and also avoid picking up dust, which takes place when marks are moistened on a pillow. The methodology becomes significantly safe and clean. Desired-

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in case, antiseptics can be included in the coating on the back of the brand in case that the user inadvertently licks the brand. For the same reason, non-toxic materials are used for the coating preferred on the back.

The water-based materials such as gelatin, gum arabic and other water-based gums, which are essentially non-toxic, they can be used in conjunction with non-aqueous adhesives so that the mark can alternatively be applied by licking or by pressure. However, the * usage of Avoid water-based preparations on the back when the brands are in hot and humid countries, for example should be used where the stamp sheets are fogged and glued together. This is another important disadvantage the usual brands, which is avoided by the invention.

Microencapsulation is also described in an article by James A. Herbig in "Encyclopedia of Chemical Technology", Volume 13, published by John Wiley & Sons, Inc. 1967, described.

Embodiments of the invention are subsequently described with reference to the drawing.

Pig. Figure 1 is a rear view of a postal 309841/0467

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mark which is provided with a self-adhesive agent according to the invention.

Figure 2 shows a front view of the postage stamp of Fig. 1 with a folded corner.

Fig. 3 is a cross-sectional view through line 3-3 of Fi ^. 1 represents.

t _

Fig. 4 is a cross-sectional view of another Embodiment of the postage stamp according to the invention represent.

Figure 5 shows a cross-sectional view of another embodiment of the postage stamp according to the invention using encapsulated adhesive. '

Figure h is an enlarged view of a microencapsulated adhesive used for the tag of Figure 5 *

Fig. 7 is a cross-sectional view of another modified brands according to the invention under Use of magnetic particles.

Fig. 8 is a view of a reverse side of a mark with an adhesive coating according to the invention in a cross pattern. 30984 1/0467

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Pig. 9 is a view of a rear side of a

Brand with a self-adhesive coating only in corner sections.

In Figures 1 to 3, the token 10 is of conventional shape and construction and has a front 11 which is illustrated with an illustration suitable for use as a postal or business brand. The rear or back 12 of the token is with a coating 13 made of self-adhesive material. The coating 13 includes a non-tacky film of a solvent activated adhesive I ² J 'and a plurality of microcapsules 15 of solvent.

The microcapsules are dimensioned in a range of 5 to 100 microns and preferably about 35 microns with a fill content of 75 "and are designed with a breaking strength of 1.4 to 7 kg / cm. The microcapsules 15 are inside ^{by the adhesive I 1 J} of the coating 13 dispersed in a random manner and of a number such that substantially all portions of the back 12 of the mark 10 are covered.

In FIG. ^2, J, the postmark may be provided with a coating 16, alternatively, the inclusion of individual strips or individual microcapsules 17 from solvent-activated adhesive, and individual microcapsules 18 of solvent, dispersed within a suitable carrier medium 19 'in

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this pall will be when there is enough pressure on the mark 16 is applied, both capsules 17 broken from adhesive and, 18 from solvent ", the corresponding materials be released into the carrier medium 19. The adhesive is then activated to bind the mark 16 on the Basic surface. Alternatively, the adhesive can be applied in strips and then through a coating of microcapsules 18 of solvent dispersed within a carrier medium which acts as a binder medium, overcoated will. After rupture of the microcapsules 18 from solvent, the solvent is used to activate the Adhesive released.

In Figure 5, the postal or business stamp 19 be provided with a coating made of a Binder or carrier medium 20 in which a multiplicity of microcapsules 21 made of adhesive are contained. Each microcapsule, as shown in Fig. 6 is made of a thin Skin 22 of non-toxic tearable material, such as gelatin or gum arabic, in which an adhesive 23 is contained is. After the skin 22 has been torn, the adhesive material 23 is released for binding the postage stamp 19 on a suitable base.

In Fig. 7, the postal or business stamp 2k can also be provided with a coating in which a plurality of magnetic particles 25 within a suitable binding medium 26 on the back of the stamp 2k

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is dispersed. This mark 2h can be applied to any magnetic surface, for example a letter or a page of a book. The magnetic interaction between the particles 25 and the magnetic base is sufficient to hold the tag in place.

In-Fig. 8 and 9 do not need the coating over be applied to the entire reverse side of a brand. For example, the cover 26 may be in a crossed pattern (Fig. 8) be applied to the back 27 of a mark 20. Alternatively, only the corners of a mark 30 (Fig. 9) be provided with a coating 31 to hold the mark on the base.

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Claims (8)

Claims 1. Postal or business brand, characterized by that it contains microencapsulated material attached to its back by a nontacky binder, wherein the microcapsules are likely to tear or break when the tag is pressed against the receiving surface, resulting in the formation of an adhesive between the back and the receiving surface. 2. Mark according to claim 1, characterized in that the microcapsules contain an adhesive _K 3. Mark according to claim 1, characterized in that the microcapsules contain a solvent which activates the binder or a component of the binder to produce the adhesive. 4. Mark according to one of the preceding claims, characterized in that the capsules have a breaking strength within the range of 1.4 to 7 kg / cm. 5. Mark according to one of the preceding claims, characterized in that the microcapsules are 5 to 100 microns in diameter. 6. Mark according to one of the preceding claims, characterized in that the dry coating of binder and microcapsules is non-toxic. 30984t / 0467 7. Mark according to claim 6, characterized in that the ingredients of the microcapsules are non-toxic. - 8. Mark according to one of the preceding claims, characterized in that the adhesive is made of rubber Viasser base exists. 9. Mark according to one of claims 1 to 7, characterized in that the adhesive is based on an adhesive of an elastomer. 10. Mark according to claim 9, characterized in that the adhesive is neoprene, nitrile rubber or SBR rubber contains. 11. Mark according to one of claims 1 to 7, characterized in that the adhesive adheres to an acrylic resin, 12. Mark according to claim 11, characterized in that the acrylic resin consists of polybutyl methacrylate, 13. Mark according to one of claims 1 to 7, characterized in that the adhesive is polyvinyl acetate or polyvinyl butyral contains. lh. Mark according to Claims 8 and 2, characterized in that the microcapsules contain water. 309841/0467 15 «Brand according to claim 9 or 10 and 2, characterized characterized in that the microcapsules are a hydrocarbon solvent contain.. 16. Mark according to claim 11 or 12 and 2, characterized in that the microcapsules contain a solvent, consisting of toluene, xylene or turpentine oil substitute, 17. Mark according to claim 13 and 2, characterized in that that the solvent contains an alcohol ester or ketone. "ν 18. Mark according to one of the preceding claims, characterized in that the encapsulation material contains gelatin or gum arabic, the ingredients not- ' are watery. . . 19. Mark according to one of claims 1 to 17, characterized characterized in that the encapsulating material contains a thermosetting resin. 20. Mark according to claim 19, characterized in that the resin is ein'urea-formaldehyde resin. 21. Mark according to one of the preceding claims, characterized in that the binder contains at least some water-activated adhesive · *; '- 3098A 1/046 7 22. Mark according to one of the preceding claims, 'characterized in that the microcapsules and, if desired the binders are applied in separate regions on the reverse side. 23. Mark according to claim 22, characterized in that the remote regions are located in the corners. 24. Mark according to one of claims 1 to 21, characterized characterized in that the microcapsules and the binder are arranged in crossed strips on the back. 25 «Method for producing a mark according to one of the preceding claims, characterized in that first the brand is printed and then the microcapsules and the binder are applied, 26. The method according to claim 25, characterized in that a dispersion of the microcapsules and the binder is sprayed over the rear surface together with a solvent and allowed to dry. 3Ό9841 / 0467 Lee rs e 11 e