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1. (WO1999009571) KEYPADS: IMPROVED APPARATUS AND METHOD OF MAKING

Pub. No.:    WO/1999/009571    International Application No.:    PCT/US1998/017068
Publication Date: Fri Feb 26 00:59:59 CET 1999 International Filing Date: Wed Aug 19 01:59:59 CEST 1998
IPC: H01H 13/702
Applicants: THE SAS GROUP, LLC
Inventors: DUFFY, Patrick
Title: KEYPADS: IMPROVED APPARATUS AND METHOD OF MAKING
Abstract:
The present invention reveals a plastic keypad (10) and a process for its manufacture. The keypad (10) is made of: a) a formed plastic shell (12); b) graphics (14) and background (16) printed on the interior surface of the formed plastic shell (12); and c) a plastic (30) filling the hollow cavity or cavities of the formed plastic shell (12). The formed plastic shell (12) of the keypad (10) is a polycarbonate and the plastic (30) filling the hollow cavities is a thermoplastic resin or an elastomer. Additionally, the background (16) printed on the interior surface of the formed plastic shell (12) is made with a flexible ink and the keypad (10) has a wear resistance test score in a Norman tester of greater than 40 cycles before the ink on the keypad (10) fails on abrasion testing.