Browse Prior Art Database

Replaceable Flexible T Strips

IP.com Disclosure Number: IPCOM000091588D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Eide, SL: AUTHOR

Abstract

In portable punch units of the type described in U.S. Patent 2,949,292, it is customary to use T-strips of rubber or other yieldable material. Such strips are inserted in respective parallel grooves with the under-surface of the T glued to the upper edge surf aces of the grooves. The edges of adjacent T's are spaced slightly to provide slits that are disposed over respective channels. When a prescored card is placed over the array of parallel T-strips, the latter yield laterally to permit a chad to be forced downward by a stylus through the intervening slit and stored in the underlying channel. With such an arrangement, the T-strips of ten become elongated unevenly as they are inserted in the grooves and are glued in place. Replacement of the strips cannot readily be done.

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Replaceable Flexible T Strips

In portable punch units of the type described in U.S. Patent 2,949,292, it is customary to use T-strips of rubber or other yieldable material. Such strips are inserted in respective parallel grooves with the under-surface of the T glued to the upper edge surf aces of the grooves. The edges of adjacent T's are spaced slightly to provide slits that are disposed over respective channels. When a prescored card is placed over the array of parallel T-strips, the latter yield laterally to permit a chad to be forced downward by a stylus through the intervening slit and stored in the underlying channel. With such an arrangement, the T-strips of ten become elongated unevenly as they are inserted in the grooves and are glued in place. Replacement of the strips cannot readily be done.

In this arrangement, the T-strips elongate uniformly to maintain slit width substantially constant are positively anchored under tension, are readily replaceable, and are end-for-end reversible to increase strip life. Adjacent each of its ends, elongated T-strip 1 has enlarged depending stem portions 2. The latter are insertable into enlarged recesses 3a and 3b at opposite ends of slit 4 defined between upright walls 5a and 5b formed in base 6. Walls 5a and 5b also define channels 7 and separate such channels from intervening slits 4. Thus, base 6 provides a series of spaced parallel slits separated by intervening channels.

Assuming that the distance between base s...