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Title:
FREE BALL BEARING AND SUPPORT TABLE
Document Type and Number:
Japanese Patent JP2005119838
Kind Code:
A
Abstract:

To provide a free ball bearing which does not generate a static electric barrier.

In the free ball bearing 1, many small balls 3 are arranged on a hemispherical recessed surface 2a formed in a body 2, one large ball 4 is put on it and held rotatably in all directions, and a cap 5 for preventing the run-off of the large ball and small balls is disposed. A conveying table or the like is constituted by arranging many balls on a base. At least the large ball 4 is made of conductive or half-conductive resin having a surface resistivity of 103-1010 Ω/square. The other part may be made of metal. When a charged conveyed article is loaded, the charge of the conveyed article does not move instantly and moderate electricity elimination is performed. Therefore, the static electric barrier of a loaded matter can be prevented.


Inventors:
IGUCHI KAORU
Application Number:
JP2003358532A
Publication Date:
May 12, 2005
Filing Date:
October 17, 2003
Export Citation:
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Assignee:
IGUCHI KIKO SEISAKUSHO KK
International Classes:
B65G13/00; B65G39/02; B65G49/06; H01L21/687; (IPC1-7): B65G39/02; B65G13/00
Domestic Patent References:
JP2002240924A2002-08-28
JPH07164078A1995-06-27
JP2002274642A2002-09-25
JP2001176946A2001-06-29
JPS479160U1972-10-03
JP2001007187A2001-01-12
Attorney, Agent or Firm:
Yasuhiko Kagawa