Industry Patents
Patent: 4459014
Subtractive Filter for the Printing of Color Photographic Film
(Click image for PDF of full patent)
| Patent Number: |
4459014 |
| Title: |
Subtractive Filter for the Printing of Color Photographic Film |
| Abstract: |
A subtractive filter having three elementary filters, each comprising a
fixed cylindrical central portion having at its center a channel for the
passage of the light and on its surface a radial milled slot; a rotary
ring concentric to the said fixed cylindrical central portion having a
graduation on its central periphery, the inside of said rotary ring having
the shape of a logarithmically progressive ramp; and a filter holder
comprising a frame adapted to slide in the said radial milled slot in the
fixed cylindrical central portion, the bottom of said frame having the
shape of a rounded point which rests against said ramp and the top of said
frame having a spring resting against a part fastened to the periphery of
the fixed central portion, said frame of said filter holder comprising at
its top a window opening and at its bottom the filter. Regulation of light
passing through each of the three filters is accomplished by rotating the
rotary rings.
|
| Country of Issue: |
US |
| First Named Inventor: |
Thebault |
| Assignee: |
Kis France |
| Continuation or Divisional of: |
|
| International Classification: |
G03B 27/73 |
| US Classification: |
355/32 |
| Issue Date: |
07-10-1984 |
| Filing Date: |
03-26-1982 |
| Application : |
362121 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
4459014 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
4459014 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
Disclaimer: This web site is not intended to offer comprehensive or sufficient
information to enable a full legal analysis of a patent or potential
infringement. The information provided on this web site is intended
as general information only, and is not intended to serve as legal
opinion, legal advice or as a substitute for legal counsel. If you
have a question about a specific factual situation, you should
contact an attorney directly
|
