Leather manufactures – Machines – Fluid-treating apparatus
Reexamination Certificate
2005-08-30
2005-08-30
Welch, Gary L. (Department: 3765)
Leather manufactures
Machines
Fluid-treating apparatus
C069S029000, C069S031000
Reexamination Certificate
active
06935144
ABSTRACT:
An improved device for leather processing comprising a vessel containing perforated dummy doors and compartments with pegs as well as friction disk fixed along the exterior periphery of the vessel. The leathers to be wet processed are subjected to mechanical action in terms of both rocking action as well as rotational movement simultaneously. The perpetual motion of the device help to create pressure generation for quickening the process and for addition of chemical solution continuously. The processing takes place under pressure generated inside the vessel and with the support of multiple mechanical actions, resulting in higher exhaustion of bath with less processing time and energy requirement and higher capacity utilization to produce good quality leather.
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Database WPI, Section CH, Week 199747, Derwent Publications Ltd., London, GB, Class D18, AN 1997-510931, XP002247335 & RU 2 078 878 C, dated May 10, 1997, English Abstract.
Leather Technician's Handbook, Appendix 7, pp 543-547 (1971) Mechanical Action of Drums published by Leather Producers' Association.
Tombetti, F., et al “Tanning in Pressurized Environment” Abstract published in Journal of American Leather Chemists Association, vol. 75, No. 62, (1980) English Translation of Italian Text.
Krishnan Subramaniyam
Lakshmanan Duraiswamy
Ramasami Thirumalachari
Rao Paruchuri Gangadhar
Samivelu Natesan
Council of Scientific and Industrial Research
Ladas and Parry LLP
Welch Gary L.
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