Browse Prior Art Database

Integrally Molded Hinge Stop Strap

IP.com Disclosure Number: IPCOM000047879D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Ramey, LD: AUTHOR [+2]

Abstract

It is desirable to limit the extent that the covers of a typewriter may be pivoted about their hinges when the top cover is opened, and therefore a hinge with limited travel is of some importance in accomplishing this limitation without the addition of substantial hardware. If there is a desire to use a molded plastic hinge structure with a "living" hinge point, it is desirable to modify the hinge to limit the extent of rotation. Fig. 1 illustrates a hinge in its position as would be found where the covers of the typewriter would be closed and where the two hinge flaps are substantially coplanar and would be attached to the covers. Covers 12 and 14 may be attached to the hinge by any conventional technique, allowing the hinge to support cover 12 with respect to cover 14.

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Integrally Molded Hinge Stop Strap

It is desirable to limit the extent that the covers of a typewriter may be pivoted about their hinges when the top cover is opened, and therefore a hinge with limited travel is of some importance in accomplishing this limitation without the addition of substantial hardware. If there is a desire to use a molded plastic hinge structure with a "living" hinge point, it is desirable to modify the hinge to limit the extent of rotation. Fig. 1 illustrates a hinge in its position as would be found where the covers of the typewriter would be closed and where the two hinge flaps are substantially coplanar and would be attached to the covers. Covers 12 and 14 may be attached to the hinge by any conventional technique, allowing the hinge to support cover 12 with respect to cover 14. The living hinge pivot portion 16 is molded to form the weakest and preferential bending point of the hinge assembly. During the molding, support bumps 18 may be molded on the underside of the hinge flaps 10. Interconnecting the hinge flaps 10 is a stop strap 20, likewise integrally molded of the same material as the hinge structure itself and containing two additional flex hinges 22. The flex hinges allow the folding of the strap 20 at predetermined points to prevent the strap from folding or binding at an undesired region. Fig. 2 illustrates the structure in its open position with the typewriter cover 12 open with respect to cover 14. The bumps 18 prevent the...