Optical security articles and methods for making same

Details Optical security articles and methods for making same Optical security articles and methods for making same

1994-11-02

1997-01-07

Krynski, William A.

Stock material or miscellaneous articles

Composite

428174, 428187, 428195, 428198, 428201, 4283044, 428913, 283 72, B32B 904

Patent

active

055915272

ABSTRACT:
Optical security articles and methods of making same are described comprising a first layer substantially transparent to visible light and having a first refractive index, the first layer having a relief pattern on a first surface thereof and a substantially smooth second surface, and an adhesive layer coterminating with the first layer. The adhesive layer substantially completely fills and makes contact with a first portion of the plurality of geometric concavities, the adhesive layer having a second refractive index which is substantially similar to the first refractive index of the first layer. A second portion of the plurality of geometric concavities are precluded from contact with the adhesive layer by a corresponding plurality of separation layers, each separation layer having a separation layer refractive index which is different from the refractive index of the first layer.

REFERENCES:
patent: Re24906 (1960-12-01), Ulrich
patent: 3594865 (1971-07-01), Erb
patent: 4025673 (1977-05-01), Reinnagel
patent: 4082873 (1978-04-01), Williams
patent: 4121003 (1978-10-01), Williams
patent: 4183554 (1980-01-01), Howard, Jr.
patent: 4184701 (1980-01-01), Franklin et al.
patent: 4202957 (1980-05-01), Bonk et al.
patent: 4315665 (1982-02-01), Haines
patent: 4417784 (1983-11-01), Knop et al.
patent: 4501439 (1985-02-01), Antes
patent: 4536016 (1985-08-01), Solomon et al.
patent: 4576439 (1986-03-01), Gale et al.
patent: 4576850 (1986-03-01), Martens
patent: 4630891 (1986-12-01), Li
patent: 4646301 (1987-02-01), Orensteen
patent: 4652274 (1987-03-01), Bloecher et al.
patent: 4691993 (1987-09-01), Porter et al.
patent: 4714656 (1987-12-01), Bradshaw et al.
patent: 4735632 (1988-05-01), Oxman et al.
patent: 4751138 (1988-06-01), Tumey et al.
patent: 4805984 (1989-02-01), Cobb, Jr.
patent: 4856857 (1989-08-01), Takeuchi et al.
patent: 4892385 (1990-01-01), Webster, Jr. et al.
patent: 4895428 (1990-01-01), Nelson et al.
patent: 4903440 (1990-02-01), Larson et al.
patent: 4906070 (1990-03-01), Cobb, Jr.
patent: 4921319 (1990-05-01), Mallik
patent: 4933120 (1990-06-01), D'Amato et al.
patent: 4933373 (1990-06-01), Moren
patent: 4959265 (1990-09-01), Wood et al.
patent: 4968063 (1990-11-01), McConville et al.
patent: 4971646 (1990-11-01), Schell
patent: 4977003 (1990-12-01), Brown et al.
patent: 4984824 (1991-01-01), Antes et al.
patent: 5011707 (1991-04-01), Schell et al.
patent: 5042842 (1991-08-01), Green et al.
patent: 5056892 (1991-10-01), Cobb, Jr.
patent: 5060981 (1991-10-01), Fossum et al.
patent: 5077870 (1992-01-01), Melbye et al.
patent: 5085514 (1992-02-01), Mallik et al.
patent: 5095415 (1992-03-01), Anderson et al.
patent: 5106125 (1992-03-01), Antes
patent: 5169707 (1992-12-01), Faykish et al.
patent: 5175030 (1992-12-01), Lu et al.
patent: 5183597 (1993-02-01), Lu
patent: 5254390 (1993-10-01), Lu
Radiation-Cure Inks, Encyclopedia of Chemical Technology (3rd Edition) 1981, vol 13, pp. 385-386.
Polyolefin & Ethylene Copolymer-Based Hot Melt Adhesives by Eastman & Fullhar Jr., Handbook of Adhesives (3rd Edition) 1990 Chapter 23, pp. 408-422.
Polyester and Polyamide High Performance Hot Melt Adhesives by Rossitto, Handbook of Adhesives (3rd Edition) 1990 Chapter 28, pp. 478-498.
Diffraction Grating, Edmond Scientific Co. p. 124, 1991.

Affiliated with

Also associated with

Rating

Optical security articles and methods for making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical security articles and methods for making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical security articles and methods for making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1762726