Abstract: A process for preparing a graphic pattern on a carrier having a protective coating thereon in exact registration with the pattern, and the article produced thereby. The process comprises applying a liquid protective coating over the graphic pattern slightly beyond the edge definition of the pattern and in substantial registration therewith, the protective coating having sufficient surface tension to wet the graphic pattern, but not the surface of the carrier. When the protective coating is dried, it dewets and retracts from the surface of the carrier onto the graphic pattern and provides exact registration therewith.
Type:
Grant
Filed:
April 1, 1986
Date of Patent:
April 5, 1988
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A heat-recoverable closure with a crosslinked pressure-sensitive adhesive is provided. The closure member is comprised of a heat-recoverable sheet and a layer of crosslinked pressure-sensitive adhesive, which maintains the closure of the closure member having the recovery process. The combination of a high surface energy heat-recoverable sheet and the crosslinked pressure-sensitive adhesive yield an article having excellent performance as a closure member.
Type:
Grant
Filed:
July 8, 1985
Date of Patent:
March 15, 1988
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Thomas J. Bonk, Tsung-I Chen, Patricia M. Olson, Douglas E. Weiss
Abstract: Optical fibers coated with a blend of poly(vinylidene fluoride) and at least one other polymer are poled to make the coating piezoelectric, whereby the optical fiber will undergo strain when the coating is exposed to an electric field.
Type:
Grant
Filed:
January 21, 1982
Date of Patent:
February 23, 1988
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Ta-Sheng Wei, Robert M. Swinehart, William G. French
Abstract: A heat-recoverable sheet is provided having two opposing exterior transverse edges and interior edges transverse to the direction of recovery of the sheet extending from one of said exterior edges. When the heat-recoverable sheet is coated on one face thereof with a hot-melt adhesive and used as a wrap-around protective closure with the interior edges and the hot-melt adhesive enveloped within the closure, the movement of the enclosed exterior edge during recovery is retarded to minimize the formation of any void spaces in the hot-melt adhesive.
Type:
Grant
Filed:
August 19, 1985
Date of Patent:
October 13, 1987
Assignee:
Minnesota Mining & Manufacturing Company
Abstract: An alkaline aqueous tanning developing solution for photographic image development comprising at least one hydroxylamine derivative. Preferred formulations may also contain at least one water-miscible polyhydroxy aliphatic organic solvent and/or a developing agent which comprises a polyhydroxybenzene compound having at least two hydroxy groups and at least one electron withdrawing and good leaving group suitable for nucleophilic addition.
Type:
Grant
Filed:
August 18, 1986
Date of Patent:
October 13, 1987
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A pyroelectric and isotropic piezoelectric polymeric film, the film being formed from a blend of polyvinylidene fluoride and at least one polymer miscible therewith at a temperature above the melting point of the polyvinylidene fluoride, and a process for preparing the film comprising forming the film, heating it to a temperature sufficient to render the film substantially amorphous, cooling at a rate and to a temperature sufficient to prevent crystallization, and polarizing the film to render same pyroelectric and isotropically piezoelectric.
Type:
Grant
Filed:
February 15, 1985
Date of Patent:
October 7, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Dennis L. Krueger, Neil W. Loeding, Claudia I. Poser
Abstract: Insulated sheet material useful for making bonded electrical connections, especially to sets of small side-by-side terminal pads. In one typical form, the sheet material is an elongated tape comprising an elongated insulating web; a plurality of narrow spaced parallel elongated electrically conductive stripes on the web; electrically conductive adhesive disposed over the stripes comprising a layer of adhesive material in which are dispersed a monolayer of rather thick electrically conductive particles; and a thin electrically insulating layer disposed over the conductive adhesive and which is nontacky or poorly tacky at room temperature, provides high electrical resistance throughout the layer to the conductive particles, softens to an adhesive and flowable condition upon heating to an elevated temperature, and upon cooling to room temperature assumes a firm and substantially nonflowable condition.
Type:
Grant
Filed:
May 6, 1985
Date of Patent:
September 9, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A pyroelectric and isotropic piezoelectric polymeric film, the film being formed from a blend of polyvinylidene fluoride and at least one polymer miscible therewith at a temperature above the melting point of the polyvinylidene fluoride, and a process for preparing the film comprising forming the film, heating it to a temperature sufficient to render the film substantially amorphous, cooling at a rate and to a temperature sufficient to prevent crystallization, and polarizing the film to render same pyroelectric and isotropically piezoelectric.
Type:
Grant
Filed:
May 1, 1984
Date of Patent:
August 19, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Dennis L. Krueger, Neil W. Loeding, Claudia I. Poser
Abstract: The adhesive layer of the novel transfer tape contains electrically and thermally conductive particles such as silver which are preferably spherical and are larger than the thickness of the adhesive between particles. When used to bond two rigid substrates together, pressure is applied to the substrates to flatten the particles to the thickness of the adhesive between particles, thus making good electrical and thermal connection between the substrates through each particle.
Type:
Grant
Filed:
May 31, 1985
Date of Patent:
August 19, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A multilayer decorative article having in order an ink-receptive vinyl film layer, a plasticizer barrier layer, and a pressure-sensitive adhesive layer, the adhesive layer being adapted to maintain adhesion to highly plasticized vinyl substrates, and the intermediate barrier layer being capable of preventing plasticizer from migrating from the vinyl substrate into the vinyl film outer layer.
Type:
Grant
Filed:
April 4, 1984
Date of Patent:
August 12, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A powder composition capable of being fused and cured on electrical wire to provide a thermally stable electrically insulative coating thereon, comprising a blend of a carboxyl-terminated polyester resin, a diimide diacid and a triglycidyl isocyanurate.
Type:
Grant
Filed:
April 5, 1985
Date of Patent:
August 12, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Hot-tackifying tape, the adhesive layer of which is virtually nontacky at 20.degree. C. but forms strong bonds to inorganic substrates at elevated temperatures, which bonds have surprisingly good resistance to prolonged exposure to high humidity and high temperatures. The adhesive layer is an acrylic-silane interpolymer of primarily acrylic ester monomer interacted with an organosilane, which interpolymer has a T.sub.g of -10.degree. to 80.degree. C.
Type:
Grant
Filed:
December 6, 1982
Date of Patent:
February 11, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Sheet material useful for making bonded electrical connections, especially to sets of small side-by-side terminal pads. In one typical form, the sheet material is an elongated tape comprising an elongated flexible insulating backing; a plurality of narrow spaced parallel elongated electrically conductive stripes on the backing; and electrically conductive adhesive disposed over the stripes comprising a layer of adhesive material in which are dispersed a monolayer of electrically conductive elements which have an average thickness greater than the average thickness of the adhesive layer, and the top edges of which are higher than at least part of the exterior surface of the adhesive layer surrounding the element.
Type:
Grant
Filed:
April 15, 1985
Date of Patent:
February 11, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Inventors:
Richard J. Tollefson, James G. Berg, Philip D. Hinderaker
Abstract: Sheet material useful for making bonded electrical connections, especially to sets of small side-by-side terminal pads. In one typical form, the sheet material is an elongated tape comprising an elongated insulating backing; a plurality of narrow spaced parallel elongated electrically conductive stripes on the backing; and electrically conductive adhesive disposed over the stripes comprising a layer of adhesive material in which are contained a monolayer of electrically conductive elements which are thinner than the adhesive layer. The surface of the adhesive layer that contacts a substrate is configured so that at least a portion of the area of the surface is recessed below other areas of the surface, whereby when the adhesive layer is heated and pressed against a substrate, adhesive material may be displaced into the recessed areas and allow the electrically conductive elements to be brought into close electrical association with the substrate.
Type:
Grant
Filed:
August 2, 1984
Date of Patent:
February 4, 1986
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A presensitized article having a radiation-sensitive layer comprising an adduct of an amorphous sulfopolyester and a diazonium resin is described which does not exhibit blocking on being stored in stacks for prolonged periods of time. The article can be exposed to radiation and developed via aqueous solvents to provide a lithographic plate that provides clean, scum-free copies, and that can be stored in a high humidity atmosphere without failure.
Type:
Grant
Filed:
September 30, 1983
Date of Patent:
September 24, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A container end assembly comprising a container end, typically metallic, with a pour opening therein; a coating over the container end comprising a carboxyl group-containing vinyl chloride/vinyl acetate copolymer composition, and a pressure-sensitive adhesive tape bonded to the coating which forms a bond thereto which is greater than that between the coating and the metallic container end, such that upon peeling of the tape from the container end, the coating delaminates in the area of the adhesive tape bond, and is removed with the tape, thus effectively masking the tape adhesive for tamper indication.
Type:
Grant
Filed:
September 13, 1984
Date of Patent:
August 27, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A lithographic concentrate capable of being mixed with water to provide a lithographic fountain solution comprising a low molecular weight polyacrylic acid, colloidal silica and, preferably, phosphate ion.
Type:
Grant
Filed:
September 20, 1983
Date of Patent:
July 23, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: Adhesive tape useful in supporting an array of parallel optical fibers in an optical transmission cable comprising an adhesive-covered biaxially oriented polyethylene terephthalate film having defined ranges for the proportion of gauche and trans conformations of the ethylene glycol linkages of the polyethylene terephthalate molecule, as measured by infrared spectroscopy, whereby extreme dimensional stability is achieved.
Type:
Grant
Filed:
October 19, 1982
Date of Patent:
July 16, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A tape closure which is adhesively adhered about a pour opening on the exterior surface of a can end having a first coating over the metallic can end and a second coating over said first coating comprising a vinyl chloride/vinyl acetate copolymer having at least about 10 percent vinyl acetate which is adhered to the tape adhesive with a bond greater than the bond between the second coating and the first coating affording removal of the second coating upon breaking the coating and delaminating the same from the first coating upon removal of the tape.
Type:
Grant
Filed:
February 17, 1984
Date of Patent:
February 19, 1985
Assignee:
Minnesota Mining and Manufacturing Company
Abstract: A carboxy-functional curative for epoxy resins comprising the reaction product of trimellitic anhydride and capped epoxy resins, the capped resins comprising a hydantoin diepoxide or a diglycidol ether of bisphenyl A reacted with benzoic acid or phenyl. The curative is used in conjunction with a thermosettable epoxy resin powder composition useful for applying electrically insulating coatings to electrical wire.
Type:
Grant
Filed:
February 9, 1984
Date of Patent:
December 4, 1984
Assignee:
Minnesota Mining and Manufacturing Company