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公开(公告)号：AT284306T
公开(公告)日：2004-12-15
申请号：AT98930255
申请日：1998-06-12
Applicant: MINNESOTA MINING & MFG
Inventor： ERWIN ROBERT L , BENSON GERALD M , SMITH KENNETH L , LUTTRELL DAN E
Abstract: Laminae suitable for use in molds for forming retroreflective cube corner elements and methods for making such laminae are disclosed. A representative lamina includes a first row of cube corner elements disposed in a first orientation and a second row of optically opposing cube corner elements disposed. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Opposing first and second groove sets are formed in the working surface of a lamina. The first groove set forms a plurality of structures having first and second optical surfaces disposed in mutually perpendicular planes that intersect along a reference edge. The second groove set forms a corresponding plurality of structures on the opposite side of the lamina. A third groove is formed in the working surface of the lamina along an axis substantially perpendicular to the axes of the grooves of the first and second groove sets. The surfaces of the third groove intersect the surfaces of the plurality of structures in substantially mutually perpendicular planes to define a plurality of cube corner elements. A plurality of such laminae can be assembled to form a mold useful in the manufacture of retroreflective products such as cube corner sheeting.
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公开(公告)号：AT248705T
公开(公告)日：2003-09-15
申请号：AT97951540
申请日：1997-11-26
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: Laminae suitable for use in a mold suitable for use in forming retroreflective sheeting and methods of making such laminae are disclosed. A representative lamina includes a single row of optically opposing cube corner elements disposed on its working surface. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Corresponding surfaces of opposing groove sets intersect substantially orthogonally along a reference edge to define first and second optical surfaces of the respective cube corner elements. The third optical surface of each respective cube corner element is defined by one surface of the third groove set.
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公开(公告)号：AU732556B2
公开(公告)日：2001-04-26
申请号：AU5515898
申请日：1997-11-26
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: Laminae suitable for use in a mold suitable for use in forming retroreflective sheeting and methods of making such laminae are disclosed. A representative lamina includes a single row of optically opposing cube corner elements disposed on its working surface. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Corresponding surfaces of opposing groove sets intersect substantially orthogonally along a reference edge to define first and second optical surfaces of the respective cube corner elements. The third optical surface of each respective cube corner element is defined by one surface of the third groove set.
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公开(公告)号：BR9810229A
公开(公告)日：2000-08-08
申请号：BR9810229
申请日：1998-06-12
Applicant: MINNESOTA MINING & MFG
Inventor： ERWIN ROBERT L , BENSON GERALD M , SMITH KENNETH L , LUTTRELL DAN E
Abstract: Laminae suitable for use in molds for forming retroreflective cube corner elements and methods for making such laminae are disclosed. A representative lamina includes a first row of cube corner elements disposed in a first orientation and a second row of optically opposing cube corner elements disposed. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Opposing first and second groove sets are formed in the working surface of a lamina. The first groove set forms a plurality of structures having first and second optical surfaces disposed in mutually perpendicular planes that intersect along a reference edge. The second groove set forms a corresponding plurality of structures on the opposite side of the lamina. A third groove is formed in the working surface of the lamina along an axis substantially perpendicular to the axes of the grooves of the first and second groove sets. The surfaces of the third groove intersect the surfaces of the plurality of structures in substantially mutually perpendicular planes to define a plurality of cube corner elements. A plurality of such laminae can be assembled to form a mold useful in the manufacture of retroreflective products such as cube corner sheeting.
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公开(公告)号：BR9714751A
公开(公告)日：2000-08-08
申请号：BR9714751
申请日：1997-12-09
Applicant: MINNESOTA MINING & MFG
Inventor： BENSON GERALD M , KELLIHER JOHN C , SMITH KENNETH L
Abstract: A method is disclosed for manufacturing a plurality of laminae for use in a mold suitable for use in forming retroreflective cube corner articles. Each lamina has opposing first and second major surfaces defining therebetween a first reference plane. Each lamina further includes a working surface connecting the first and second major surfaces. The working surface defines a second reference plane substantially parallel to the working surface and perpendicular to the first reference plane and a third reference plane perpendicular to the first reference plane and the second reference plane. The method includes orienting a plurality of laminae to have their respective first reference planes parallel to each other and disposed at a first angle relative to a fixed reference axis. At least two groove sets are formed in the working surface. Each groove set includes at least two parallel adjacent V-shaped grooves in the working surface of the laminae. The at least two groove sets form first, second and third groove surfaces that intersect substantially orthogonally to form a plurality of cube corner elements. Each of the plurality of cube corner elements is preferably located on essentially one of the plurality of lamina. The plurality of laminae can be oriented at a second angle relative to the fixed reference axis prior to forming at least one of the groove sets. A mold according to the present invention and a retroreflective article made therefrom are also disclosed.
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Patent Agency Ranking
公开(公告)号：ES2144981T1
公开(公告)日：2000-07-01
申请号：ES96942885
申请日：1996-12-05
Applicant: MINNESOTA MINING & MFG
Inventor： NESTEGARD SUSAN K , BENSON GERALD M , FREY CHERYL M , KELLIHER JOHN C , LASCH JAMES E , SMITH KENNETH L
IPC: G02B5/124
Abstract: A cube corner retroreflective sheeting construction comprising alternating zones of cube corner element arrays disposed at approximately ninety degrees orientations to provide exactly two principal plane of improved retroreflective performance in response to light incident on the sheeting at high entrance angles is disclosed. According to one embodiment the sheeting includes a body layer which has an elastic modulus less than 7x108 pascals and cube corner elements formed from a material which has an elastic modulus greater than 16x108 pascals. According to a second embodiment the sheeting includes an overlay film having two major surfaces and comprising a first polymeric material and a plurality of arrays of substantially independent cube corner elements bonded to a major surface of the overlay film having a minimal, fractured land.
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公开(公告)号：NO996564A
公开(公告)日：2000-03-01
申请号：NO996564
申请日：1999-12-29
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
CPC classification number: B29D11/00625 , B32B27/00 , G02B5/124 , Y10T156/1023 , Y10T156/1064 , Y10T428/24479 , Y10T428/2457 , Y10T428/24612
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公开(公告)号：NO996562L
公开(公告)日：2000-03-01
申请号：NO996562
申请日：1999-12-29
Applicant: MINNESOTA MINING & MFG
Inventor： ERWIN ROBERT L , BENSON GERALD M , SMITH KENNETH L , LUTTRELL DAN E
Abstract: Laminae suitable for use in molds for forming retroreflective cube corner elements and methods for making such laminae are disclosed. A representative lamina includes a first row of cube corner elements disposed in a first orientation and a second row of optically opposing cube corner elements disposed. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Opposing first and second groove sets are formed in the working surface of a lamina. The first groove set forms a plurality of structures having first and second optical surfaces disposed in mutually perpendicular planes that intersect along a reference edge. The second groove set forms a corresponding plurality of structures on the opposite side of the lamina. A third groove is formed in the working surface of the lamina along an axis substantially perpendicular to the axes of the grooves of the first and second groove sets. The surfaces of the third groove intersect the surfaces of the plurality of structures in substantially mutually perpendicular planes to define a plurality of cube corner elements. A plurality of such laminae can be assembled to form a mold useful in the manufacture of retroreflective products such as cube corner sheeting.
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公开(公告)号：AU712593B2
公开(公告)日：1999-11-11
申请号：AU1146397
申请日：1996-12-05
Applicant: MINNESOTA MINING & MFG
Inventor： NESTEGARD SUSAN K , BENSON GERALD M , FREY CHERYL M , KELLIHER JOHN C , LASCH JAMES E , SMITH KENNETH L , SZCZECH THEODORE J
IPC: G02B5/124
Abstract: A cube corner retroreflective sheeting construction comprising alternating zones of cube corner element arrays disposed at approximately ninety degrees orientations to provide exactly two principal plane of improved retroreflective performance in response to light incident on the sheeting at high entrance angles is disclosed. According to one embodiment the sheeting includes a body layer which has an elastic modulus less than 7x108 pascals and cube corner elements formed from a material which has an elastic modulus greater than 16x108 pascals. According to a second embodiment the sheeting includes an overlay film having two major surfaces and comprising a first polymeric material and a plurality of arrays of substantially independent cube corner elements bonded to a major surface of the overlay film having a minimal, fractured land.
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公开(公告)号：CA2295152A1
公开(公告)日：1999-01-14
申请号：CA2295152
申请日：1997-11-26
Applicant: MINNESOTA MINING & MFG
Inventor： SMITH KENNETH L , BENSON GERALD M
Abstract: Laminae (12) suitable for use in a mold suitable for use in forming retroreflective sheeting and methods of making such laminae are disclosed. A representative lamina (12) includes a single row of optically opposing cube corner elements disposed on its working surface. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Corresponding surfaces of opposing groove sets intersect substantially orthogonally along a reference edge to define first and second optical surfaces (60, 70) of the respective cube corner elements. The third optical surface of each respective cube corner element is defined by one surface of the third groove set (46).
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