Browse Prior Art Database

Snap In Margin Scale (Plastic Injection Molded)

IP.com Disclosure Number: IPCOM000050139D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Kindler, T: AUTHOR

Abstract

To provide the maximum flexibility in the manufacture of typewriter and printer covers, it is desirable to be able to substitute margin scales such that the scale provided with the machine is indicative of the machine's capability. Some machines may advantageously be provided with a single pitch margin scale, a dual pitch margin scale or a margin scale indicating multiple pitches including three or more.

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Snap In Margin Scale (Plastic Injection Molded)

To provide the maximum flexibility in the manufacture of typewriter and printer covers, it is desirable to be able to substitute margin scales such that the scale provided with the machine is indicative of the machine's capability. Some machines may advantageously be provided with a single pitch margin scale, a dual pitch margin scale or a margin scale indicating multiple pitches including three or more.

Printer cover 10 is provided with a window 12 during its manufacture, typically that of being molded.

The cover has an appendage 14 molded therein in proximity to the window
12. A retaining ledge 16 forming a groove 18 is also formed into the cover 10. The margin scale 20 is typically a molded item having therein a hole 22 near one edge. The scale may bear on its surface the indicia of the different pitch margin scales for a particular model typewriter or printer.

Hole 22 is positioned relatively close to edge 24 to provide a deflectable portion 26. As the toe 28 of scale 20 is inserted into groove 18 and then the top portion of scale 20 forced leftward in Fig. 1, the portion of material 26 remaining after the formation of hole 22 will deflect, as is more easily viewable in Fig. 2. As material 26 is forced past protrusion 14, it will deflect back toward its normal relaxed position and tend to retain scale 20 in position, exposing the scale to the typewriter operator.

The scale may be removed, if necessary, for maint...