Photocopying – Projection printing and copying cameras – Detailed holder for original
Reexamination Certificate
2004-10-01
2009-06-23
Mathews, Alan A (Department: 2851)
Photocopying
Projection printing and copying cameras
Detailed holder for original
C355S030000, C355S053000, C439S005000, C414S935000, C206S710000
Reexamination Certificate
active
07551265
ABSTRACT:
Techniques for minimizing contamination by particles that wear off of components that come into and out of contact with each other. The invention involves forming at least one of the components out of a magnetic material so that the particles that wear off of the component are magnetic themselves. Then a magnetic field is used to attract the particles. In one embodiment, the particles are attracted to and collected by a magnet. In this way, the particles are drawn away from any components that might be contaminated. In some embodiments, the magnetic component is also magnetized. In other embodiments, a magnet is placed in contact with the magnetic component. In other embodiments, each of the components that come into contact with each other are formed of a magnetic material.
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Mathews Alan A
Nikon Corporation
Weaver Austin Villeneuve & Sampson LLP
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