Title:
PLASTIC FILTER FOR CAMERA AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPS5954520
Kind Code:
A
Abstract:
PURPOSE: To obtain the titled filter not requiring any assembling work or threading work, easy to mass-produce and low in cost, by molding a main body of the filter for a camera and a frame as one body.
CONSTITUTION: The frame 1 and the main body 2 of the filter are molded as one body. To prevent a gate mark and flow marks from being generated at the time of molding the main body 2 from a plastic, for example, a running gate 5 is provided at a part of a rear part of the frame 1, and a groove 6 or 7 is provided at the boundary of the main body 2 and the frame 1.
EFFECT: It is unnecessitated to fit the main body of the filter, and it can be contrived to enlarge the effective field of vision.
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Inventors:
ISHIBAI ISAO
KOBAYASHI KUNIMITSU
KOBAYASHI KUNIMITSU
Application Number:
JP16313082A
Publication Date:
March 29, 1984
Filing Date:
September 21, 1982
Export Citation:
Assignee:
HOYA CORP
International Classes:
G03B11/00; B29C45/00; B29C61/00; B29D11/00; (IPC1-7): B29D11/00; G03B11/00
Domestic Patent References:
| JPS5248428B1 | 1977-12-09 |
Attorney, Agent or Firm:
Masayuki Asakura
Previous Patent: A manufacturing method of electronic parts and electronic parts
Next Patent: JPS5954521
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