Photographic film cassette having light trapping members

Details Photographic film cassette having light trapping members Photographic film cassette having light trapping members

1992-05-08

1993-06-08

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354277, G03B 1726

Patent

active

052171795

ABSTRACT:
A photographic film cassette has light-trapping members adhered to the upper and lower inner surfaces of a port portion of a plastic-molded cassette shell by a heat-activated type crystallization delay adhesive. The adhesive has properties that its stickiness is revealed by heat application and maintained for one second or more at temperatures equal to a heat-distortion temperature of the cassette shell, and its crystallization is advanced in a gradual manner. The adhesive is applied to the back surfaces of the light-trapping members. After the light-trapping members are heated, they are cooled down to a temperature equal to the heat-distortion temperature of the plastic cassette shell and attached to the port portion.

REFERENCES:
patent: 4568590 (1986-02-01), Iwai
patent: 4730778 (1988-03-01), Akao et al.
patent: 4787506 (1988-11-01), Akao
patent: 4834306 (1989-05-01), Robertson et al.
patent: 4846418 (1989-07-01), Fairman
patent: 5098492 (1992-03-01), Hoffacker et al.
patent: 5181671 (1993-01-01), Mizuno

Affiliated with

Also associated with

Rating

Photographic film cassette having light trapping members does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic film cassette having light trapping members, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic film cassette having light trapping members will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1928824