# US 5,344,681 A · Patterned pressure sensitive adhesive transfer tape > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,681 A - Document ID: US5344681A - Status: Granted - Kind: A - Application number: 08/136,951 - Filed: 1993-10-13 - Granted: 1994-09-06 - Earliest claimed: 1991-09-12 - Assignees: Minnesota Mining and Manufacturing Company - Inventors: Clyde D. Calhoun; David C. Koskenmaki; Mieczyslaw H. Mazurek - Web page: https://patentgrep.com/patent/US5344681A ## CPC - C09J 7/20: characterised by their carriers - C09J 2301/204: the adhesive coating being discontinuous - C09J 2301/206: the adhesive layer comprising non-adhesive protrusions - Y10T 428/1486: Ornamental, decorative, pattern, or indicia - Y10T 428/1495: Adhesive is on removable layer - Y10T 428/2486: with outer strippable or release layer - Y10T 428/28: Web or sheet containing structurally defined element or component and having an adhesive outermost layer - Y10T 428/2809: including irradiated or wave energy treated component - Y10T 428/2839: with release or antistick coating - Y10T 428/2848: Three or more layers - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A carrier web with recesses or pockets therein which contain pressure sensitive adhesive. The recesses in the carrier web maintain the adhesive in a discrete pattern during handling and storage and prevent lateral flow of the pressure sensitive adhesive under ambient conditions. The patterned adhesive may be transferred to an article directly from the recesses in the carrier by pressing the article onto the carrier web or indirectly by transferring the adhesive first to a cover sheet or to the flat backside of the web and thence to the article. ## Claims ### Claim 1 An adhesive transfer tape comprising: a) a carrier having two oppositely parallel surfaces wherein a first of said surfaces contains a series of recesses therein and the second of said surfaces is smoother than said first surface, and b) a pressure sensitive adhesive in said recesses to provide segments of said adhesive in said recesses, said segments being surrounded by an area substantially free from said adhesive, so that when said tape is wound upon itself with said first surface contacting said second surface and thereafter unwound, said adhesive transfers from said recesses to said second surface. ### Claim 2 (depends on 1) The adhesive transfer tape of claim 1 wherein the recesses are formed by embossing said first surface. ### Claim 3 (depends on 1) The adhesive transfer tape of claim 1 wherein the recesses are substantially in spaced-apart relationship to one another. ### Claim 4 (depends on 3) The adhesive transfer tape of claim 3 wherein the recesses are three dimensional and have a cross-sectional shape selected from the group consisting of oval, circular, polygonal and rectangular wherein the cross-section is taken parallel to the surfaces of said carrier. ### Claim 5 (depends on 1) The adhesive transfer tape of claim 1 wherein the pressure sensitive adhesive, upon transfer from the recesses to said second surface, preferentially adheres to an article placed in contact with the adhesive so that the adhesive transfers to the article as said article is lifted from the tape. ### Claim 6 (depends on 1) The adhesive transfer tape of claim 1 wherein the pressure sensitive adhesive in said recesses is formed by coating an ultraviolet radiation curable monomeric liquid mixture to fill said recesses therewith and then subjecting the monomeric mixture in said recesses to ultraviolet radiation to cure the mixture. ### Claim 7 (depends on 6) The adhesive transfer tape of claim 6 wherein the monomeric liquid mixture further comprises an expanding agent. ### Claim 8 (depends on 7) The adhesive transfer tape of claim 7 wherein the expanding agent comprises expandable microspheres. ### Claim 9 (depends on 1) The adhesive transfer tape of claim 1 wherein the carrier comprises a thermoplastic film. ### Claim 10 (depends on 1) The adhesive transfer tape of claim 1 wherein the surfaces of said recesses are precoated with a release coating. ### Claim 11 (depends on 10) The adhesive transfer tape of claim 10 wherein said second surface of the tape is precoated with a release coating. ### Claim 12 (depends on 11) The adhesive transfer tape of claim 11 wherein the peel adhesion (dynes/cm) of the adhesive with respect to the release coating in said recesses is less than the peel adhesion (dynes/cm) of the adhesive with respect to the release coating on said second surface. ### Claim 13 (depends on 12) The transfer tape of claim 12 wherein both release coatings comprise silicone. ### Claim 14 (depends on 1) The transfer tape of claim 1 wherein the pressure sensitive adhesive is selected from the group consisting of acrylic and rubber-resin pressure sensitive adhesives. ### Claim 15 (depends on 3) The transfer tape of claim 3 wherein said recesses prevent lateral flow of the adhesive under ambient conditions. ### Claim 16 (depends on 1) The transfer tape of claim 1 wherein the pressure sensitive adhesive in said recesses comprises two adhesive coatings wherein one of said coatings is more adhesive than the other. ### Claim 17 (depends on 1) The transfer tape of claim 1 wherein the pressure sensitive adhesive in at least one recess has different adhesive properties than the pressure sensitive adhesive in at least one other recess. ### Claim 18 (depends on 1) The transfer tape of claim 1 wherein the normally pressure sensitive adhesive is capable of lateral cold flow after the adhesive is transferred from said recesses to a second surface. ### Claim 19 An adhesive transfer tape comprising: a) a carrier having two oppositely parallel surfaces wherein one of said surfaces comprises a series of recesses therein, and b) a pressure sensitive adhesive in said recesses, to provide segments of said adhesive in said recesses, said segments being surrounded by an area substantially free from said adhesive, wherein as an article is pressed into contact with exposed adhesive in said recesses, the adhesive transfers to the article as said article is lifted from the tape. ### Claim 20 (depends on 19) The adhesive transfer tape of claim 19 wherein the recesses are formed by embossing said first surface. ### Claim 21 (depends on 19) The adhesive transfer tape of claim 19 wherein the recesses are substantially in spaced-apart relationship to one another. ### Claim 22 (depends on 21) The adhesive transfer tape of claim 21 wherein the recesses are three dimensional and have a cross-sectional shape selected from the group consisting of oval, circular, polygonal and rectangular wherein the cross-section is taken parallel to the surfaces of said carrier. ### Claim 23 (depends on 19) The adhesive transfer tape of claim 19 wherein the surfaces of the recesses are precoated with a release coating comprising silicone. ### Claim 24 (depends on 21) The transfer tape of claim 21 wherein said recesses prevent lateral flow of the adhesive under ambient conditions. ### Claim 25 (depends on 19) The transfer tape of claim 19 wherein the transfer tape further comprises a cover sheet over said recesses, said cover sheet being releasable and removable from the tape to expose said adhesive. ### Claim 26 (depends on 19) The transfer tape of claim 19 wherein the pressure sensitive adhesive is selected from the group consisting of acrylic and rubber-resin pressure sensitive adhesives. ### Claim 27 (depends on 25) The transfer tape of claim 25 wherein the adhesive is transferable to the cover sheet when said cover sheet is removed from the carrier. ### Claim 28 (depends on 19) The transfer tape of claim 19 wherein the adhesive includes particulate matter which increases the electrical conductivity of said adhesive.