Method of fabricating surface relief holograms

• US 4,758,296 A
• Filed: 06/20/1983
• Issued: 07/19/1988
• Est. Priority Date: 06/20/1983
• Status: Expired due to Term

• Current Assignee: Stephen P. Mcgrew
• Original Assignee: Stephen P. Mcgrew
• Inventors: McGrew, Stephen P.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Hoch, Ramon R.
• Application Number:
  US06/505,888
• Time in Patent Office: 1,856 Days
• Field of Search: 156/230-232, 156/234-235, 156/237-239, 156/240, 156/249, 156/244.17, 156/246, 156/247, 156/272.2, 156/275.5, 156/275.7, 430/1, 430/2, 430/258, 430/259, 430/253, 430/260, 430/321, 264/1.3, 264/1.4, 264/226, 264/283, 264/293, 264/22, 264/227, 264/2.1-2.4, 350/3.6, 350/3.65, 350/3.69, 350/3.66, 350/162.11, 350/162.17, 350/3.76, 425/373, 425/115, 427/147, 427/146
• US Class Current: 156/231
• CPC Class Codes: B29C 35/08 by wave energy or particle radiation B29C64/00, B29C71/04 take precedence
• CPC Class Codes: B29C 39/148 characterised by the shape of the surface
• CPC Class Codes: B29C 41/00 Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor with compacting pressure B29C43/00 ; by lay-up of reinforcement of substantial or continuous length B29C70/30
• CPC Class Codes: B29C 59/002 Component parts, details or accessories; Auxiliary operations
• CPC Class Codes: B29L 2031/7224 Holograms
• CPC Class Codes: B44B 5/00 Machines or apparatus for embossing decorations or marks, e.g. embossing coins corrugating sheet metal or metal tubes, embossing combined with sheet-metal working operations B21D; embossing plastics or substances in a plastic state, in general B29C59/00; embossing of paper or cardboard in general B31F1/07; forme embossing B41C1/08; embossing combined with application of ink, type marking presses, selective embossing mechanisms B41F, B41J, B41K, B41M; embossing leather C14B
• CPC Class Codes: B44B 5/026 Dies B44B5/028 takes precedence
• CPC Class Codes: B44C 1/1729 Hot stamping techniques
• CPC Class Codes: G03H 1/0244 Surface relief holograms replicating hologram without interference recording G03H1/0276
• CPC Class Codes: G03H 1/028 by embossing
• CPC Class Codes: G03H 2001/0296 Formation of the master hologram
• CPC Class Codes: G03H 2001/185 Applying a curing step
• CPC Class Codes: G03H 2001/2263 Multicoloured holobject
• CPC Class Codes: G03H 2001/2268 Rainbow hologram
• CPC Class Codes: G03H 2227/04 Production line for mass production
• CPC Class Codes: G03H 2250/10 arranged to be transferred onto a carrier body
• CPC Class Codes: G03H 2250/12 Special arrangement of layers
• CPC Class Codes: G03H 2270/23 Ribbon shaped, e.g. holographic foil
• CPC Class Codes: G03H 2270/52 Integrated surface relief hologram without forming layer

Abstract

A method of manufacturing surface relief holograms wherein an original surface relief hologram in the form of an endless loop or a drum is continuously coated with a radiation-curable resin. After curing, the resin bears a replica of the original hologram and it is continuously drawn off from the original as a sheet or film. The replica film becomes a hot-stamping foil when formed in contact with a carrier film, metallized, and coated with a hot-stamping adhesive.

Claims

1. A method of forming resin replicas of a surface relief structure, comprising:

providing a durable surface relief hologram master of said structure;

coating said master with a radiation-curable resin;

curing said resin in contact with said master by exposing said resin to radiation; and

removing said resin in a cured state from said master.

2. The method of claim 1 wherein said master is in the form of a belt and said coating, curing, and removing are done continuously.

3. The method of claim 1 wherein said master is in the form of a cylinder and said coating, curing, and removing are done continuously.

4. The method of claim 1, further including the step of coating the relief side of said resin replica with a reflectance-enhancing substance.

5. A method of forming resin replicas of surface relief structures, comprising;

providing a durable surface relief hologram master of said structures;

forming a laminate of said master and an opaque material with radiation-curable resin therebetween;

curing said resin in said laminate by exposing said resin to radiation; and

separating said cured resin and said opaque material from said master.

6. The method of claim 5 wherein said master is in the form of a belt and said coating, curing, and removing are done continuously.

7. The method of claim 5 wherein said master is in the form of a cylinder and said coating, curing, and removing are done continuously.

8. The method of claim 5, further including the step of coating the relief side of said resin replica with a reflectance-enhancing substance.

9. A method of making a hot-stamping foil, comprising:

providing a durable surface relief hologram master;

forming a laminate of said master and a smooth carrier film with a radiation-curable resin therebetween;

curing said resin in said laminate to form a replica of said master;

separating said cured resin and said smooth material from said master; and

coating the relief surface of said replica with a hot-stamping adhesive.

10. The method of claim 9 wherein said master is in the form of a belt and said coating, curing, and removing are done continuously.

11. The method of claim 9 wherein said master is in the form of a cylinder and said coating, curing, and removing are done continuously.

12. The method of claim 9, further including the step of coating the relief side of said resin replica with a reflectance-enhancing substance.