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公开(公告)号：AU6094296A
公开(公告)日：1997-01-09
申请号：AU6094296
申请日：1996-06-06
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: The invention provides a thin, flexible retroreflective sheeting formed from a substantially optically transparent material. The sheeting comprises a substrate having a base surface disposed in a base plane; a structured surface opposite the base surface that contains at least one array of canted cube corner element matched pairs formed by three intersecting sets of substantially parallel grooves including a primary groove set, and two sets of secondary grooves, each matched pair including a first canted cube corner element and a second canted cube corner element disposed opposite a primary groove from the first element, wherein (a) opposing cube corner elements in a given array have their symmetry axes canted in a first plane and through a predetermined cant angle measuring between 4 DEG and 15 DEG from an axis extending normally from the base; (b) the sheeting of this given array exhibits its broadest range of entrance angularity in a second plane angularly displaced from the first plane, and in a third plane, angularly displaced from the first plane; and substantially each of the cube corner element arrays is oriented such that either the second or third plane is approximately parallel with an edge of the sheeting.
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公开(公告)号：DE69022870D1
公开(公告)日：1995-11-16
申请号：DE69022870
申请日：1990-03-02
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M
IPC: G02B5/124
Abstract: Retroreflective elements, such as cube-corner elements or right triangular prisms containing cube-corners, are arranged on articles to define separation surfaces between the elements; in another embodiment, the elements are truncated cube-corners incorporating similar surfaces on the elements themselves. If the surfaces are transparent they will transmit light through the article, rendering it partially transparent and partially retroreflective. The surfaces may be flat or curved. Standard grooving techniques may be employed to construct the elements, using mold cutting tools having flattened or curved tips instead of V-shaped tips; alternatively, electroformed molds may be lapped to include the shape required to produce surfaces. The elements and surfaces may be embodied in sheeting materials or internally illuminated signs.
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公开(公告)号：AT129077T
公开(公告)日：1995-10-15
申请号：AT90302280
申请日：1990-03-02
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M , MANUFACTURING COMPANY
IPC: G02B5/124
Abstract: Retroreflective elements, such as cube-corner elements or right triangular prisms containing cube-corners, are arranged on articles to define separation surfaces between the elements; in another embodiment, the elements are truncated cube-corners incorporating similar surfaces on the elements themselves. If the surfaces are transparent they will transmit light through the article, rendering it partially transparent and partially retroreflective. The surfaces may be flat or curved. Standard grooving techniques may be employed to construct the elements, using mold cutting tools having flattened or curved tips instead of V-shaped tips; alternatively, electroformed molds may be lapped to include the shape required to produce surfaces. The elements and surfaces may be embodied in sheeting materials or internally illuminated signs.
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公开(公告)号：CA2173855A1
公开(公告)日：1995-05-04
申请号：CA2173855
申请日：1994-10-13
Applicant: MINNESOTA MINING & MFG
Inventor： MAZUREK MIECZYSLAW H , GALKIEWICZ ROBERT K , BENSON GERALD M
IPC: C09J7/00 , B29C43/22 , B29C43/28 , B29C59/04 , C09J5/00 , C09J7/02 , C09J133/00 , C09J133/04 , C09J201/00
Abstract: The invention provides pressure-sensitive adhesive (PSA) coated articles, including tapes and transfer coatings, having microstructured surfaces and methods of making pressure-sensitive adhesive articles bearing such microstructured surfaces. The performance properties of the pressure-sensitive adhesive articles can be tailored by independently varying the microstructure and the rheological properties of the pressure-sensitive adhesive.
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公开(公告)号：CA2173232A1
公开(公告)日：1995-04-27
申请号：CA2173232
申请日：1994-10-20
Applicant: MINNESOTA MINING & MFG
Inventor： BACON CHESTER A JR , BENSON GERALD M
Abstract: Conformable cube corner retroreflective sheetings (10c) comprising a plurality of discrete cube corner segments (12) which are conformably bonded together, each cube corner segment (12) comprising a plastic body portion (62) having a substantially planar front major surface and at least one minute cube corner retroreflective element projecting rearwardly from the body portion and defining a cube corner point side of the cube corner segment. The peripheries of the cube corner segments can be defined by a plurality of separations (50) extending from the cube corner point sides to the front major surfaces, the separations being disposed between adjacent cube corner segments. Adjacent cube corner segments are conformably bonded together in the sense that they are either: (1) separated by a gap of less than about 1 millimeter and bonded together through a conformable carrier layer (52); or (2) separated by a gap which is substantially filled with a conformable resin that bonds the side walls of adjacent cube corner segments together (66). Alternatively a conformable cube corner retroreflective sheeting can comprise a plurality of connecting bridges (70) disposed between adjacent cube corner segments, the connecting bridges being at least one of fractured and frangible, and spanning grooves which extend vertically from the cube corner point sides toward the front major surfaces and terminate at the connecting bridges. Also, methods for making such conformable sheetings.
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Patent Agency Ranking
公开(公告)号：CA2173231A1
公开(公告)日：1995-04-27
申请号：CA2173231
申请日：1994-10-20
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M , SMITH KENNETH L
Abstract: A method is disclosed for manufacturing a cube corner article (191) comprising the steps of providing a machinable substrate material suitable for forming reflective surfaces, and creating a plurality of geometric structures including cube comer elements (198-203) in the substrate. The step of creating the cube corner elements ( 198-204) comprises directly machining at least three sets of parallel grooves (197. 196, 195) in the substrate so that only one side of at least one groove in at least one groove set forms cube corner elementoptical surfaces.
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公开(公告)号：CA2173148A1
公开(公告)日：1995-04-27
申请号：CA2173148
申请日：1994-10-20
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: A retroreflective cube corner article (141) which is a replica of a directly machined substrate comprises a plulality of single cube corner clements which are machined in the substrate. Each cube corner element is bounded by at least one groove from each of three sets of parallel grooves (130, 106. 108) in the substrate so that the article comprises a plurality of different geometric structures.
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公开(公告)号：IN169793B
公开(公告)日：1991-12-21
申请号：IN406MA1987
申请日：1987-06-03
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M
Abstract: Cube-corner retroreflector capable of reflecting light over a wide range of incidence angles. The reflector, which in some embodiments may be in the form of flexible sheeting, comprises a transparent body (23) configured on its rear surface (24) with at least one set of three mutually perpendicular surfaces providing cube-corner retroreflection of light (28) beamed against the front of the body, and a specularly reflective surface (29) which is shaped as a negative of the aforementioned set of three mutually perpendicular surfaces and which is interfitted with and closely spaced from that set of rear surfaces, with the adjacent and matching portions of the specularly reflective and rear surfaces being substantially parallel to one another.
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公开(公告)号：CA1292903C
公开(公告)日：1991-12-10
申请号：CA538248
申请日：1987-05-28
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M
IPC: G02B5/124
Abstract: WIDE-ANGLE-REFLECTIVE CUBE-CORNER RETROREFLECTIVE SHEETING Cube-corner retroreflector capable of reflecting light over a wide range of incidence angles. The reflector, which in some embodiments may be in the form of flexible sheeting, comprises 1) a transparent body configured on its rear surface with at least one set of three mutually perpendicular surfaces providing cube-corner retroreflection of light beamed against the front of the body, and 2) a specularly reflective surface which is shaped as a negative of the aforementioned set of three mutually perpendicular surfaces and which is interfitted iwth a closely spaced from that set of rear surfaces, with the adjacent and matching portions of the specularly reflective and rear surfaces being substantially parallel to one another.
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公开(公告)号：CA2224095C
公开(公告)日：2007-03-27
申请号：CA2224095
申请日：1996-06-06
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: The present invention provides a tiled cube corner retroreflective sheeting that exhibits improved retroreflective performance in at least one plane substantially parallel with an edge of the sheeting, and preferably in two or more planes. A tiled retroreflective sheeting includes a structured surface having a plurality of cube corner element arrays oriented at predetermined angles relative to the edge of the sheeting. The angles are selected to align at least one broad plane of entrance angularity approximately parallel with the edge of the sheeting and preferably to align another broad plane of entrance angularity approximately perpendicular to the edge of the sheeting.
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