Method for the manufacturing of a diffraction grating...

Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Autogenously or by activation of dry coated particles

Reexamination Certificate

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C264S109000

Reexamination Certificate

active

07850886

ABSTRACT:
A diffractive microstructure (11) is implemented as a security feature in the surface of tablet (4). For this purpose the punches (1a,1b) comprise a microstructure (11), which during the compression process produce the diffractive microstructure on the surface of the tablet (4), by plastic and/or visco-elastic deformation of the powder particles. The method according to the invention is compatible to the existing tablet manufacturing methods with their high production speeds and compression forces. It is also compatible to the usual tabletting adjuvants.

REFERENCES:
patent: 4668523 (1987-05-01), Begleiter
patent: 5451505 (1995-09-01), Dollinger
patent: 6455157 (2002-09-01), Simons
patent: 2008/0057312 (2008-03-01), Walter et al.
patent: 2343862 (2000-05-01), None
patent: WO 01/10464 (2001-02-01), None
patent: WO2006/027688 (2006-03-01), None
patent: WO2006/047695 (2006-05-01), None
Begleiter “Edible holography: the application of holographic techniques to food processing”, SPIE, vol. 1461, 1991 pp. 102-109.
Marshall, K. “Tablet press fundaments,” Tablets & Capsules 2005, p. 6-11.
Armstrong, N. A. “Considerations of Compression Speed in Tablet Manufacture,” Pharmaceutical Technology, Sep. 1990, p. 106-114.

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