Lens tube unit and method for producing the same

Details Lens tube unit and method for producing the same Lens tube unit and method for producing the same

1986-11-26

1989-04-18

Corbin, John K.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

350255, 350320, 264242, G02B 702

Patent

active

048221384

ABSTRACT:
A lens tube unit composed of an intermediate tube composed of metal or resin and provided with a helicoid or helicoids on the internal periphery and/or external periphery; and an inner tube and an outer tube fitted with or screwed in the internal and external peripheries of the intermediate tube and provided with a fitting portion or helicoid; and the outer and/or inner tube is molded as a sandwich structure consisting of a central core resin layer and skin resin layers.

REFERENCES:
patent: 2932237 (1960-04-01), Back
patent: 2956492 (1960-10-01), Quick
patent: 3168610 (1965-02-01), Kende
patent: 3599290 (1971-08-01), Garner
patent: 3733156 (1973-05-01), Garner
patent: 3773405 (1973-11-01), Sugano
patent: 3809519 (1974-05-01), Garner
patent: 4172634 (1979-10-01), Thompson
patent: 4175831 (1979-11-01), Ito
patent: 4472031 (1984-09-01), Muryoi
patent: 4690514 (1987-09-01), Kamata et al.

Affiliated with

Also associated with

Rating

Lens tube unit and method for producing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lens tube unit and method for producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens tube unit and method for producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2393331