Keypads: Apparatus and methods of making

Details Keypads: Apparatus and methods of making Keypads: Apparatus and methods of making

1998-05-19

1999-06-01

Friedhofer, Michael A.

Electricity: circuit makers and breakers

Solid contact

Membrane type

29622, H01H 1370, H01H 918

Patent

active

059090219

ABSTRACT:
The keypad is made of a) a formed plastic shell; b) graphics and background printed on the interior surface of the formed plastic shell; and c) a plastic filling the hollow cavity or cavities of the formed plastic shell. The formed plastic shell of the keypad is a polycarbonate and the plastic filling the hollow cavities is a thermoplastic resin or an elastomer. Additionally, the background printed on the interior surface of the formed plastic shell is made with a flexible ink and the keypad has a wear resistance test score in a Norman tester of greater than 40 cycles before the ink on the keypad fails on abrasion testing.

REFERENCES:
patent: 5399821 (1995-03-01), Inagaki et al.
patent: 5475192 (1995-12-01), Inagaki et al.
patent: 5589121 (1996-12-01), Inagaki et al.
patent: 5613599 (1997-03-01), Inagaki et al.
patent: 5807002 (1998-09-01), Tsai
M. Laurin, In-Mold Decoration, GE Plastics, Structured Products, Apr. 14, 1997.

Affiliated with

Also associated with

Rating

Keypads: Apparatus and methods of making does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keypads: Apparatus and methods of making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keypads: Apparatus and methods of making will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-956330