Browse Prior Art Database

Typewriter Punch

IP.com Disclosure Number: IPCOM000093799D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Bederman, S: AUTHOR [+2]

Abstract

Standard typewriter ball 10 such as that employed in the IBM SELECTRIC typewriter, is modified by mounting a punch attachment on it. The punch attachment consists of plastic cup 12 having metal punch 14 inserted in it. Cup 12 is secured to ball 10 by moving handle 16 to a lock position. The punch attachment is removed from ball 10 by moving handle 16 to an unlock position.

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Typewriter Punch

Standard typewriter ball 10 such as that employed in the IBM SELECTRIC typewriter, is modified by mounting a punch attachment on it. The punch attachment consists of plastic cup 12 having metal punch 14 inserted in it. Cup 12 is secured to ball 10 by moving handle 16 to a lock position. The punch attachment is removed from ball 10 by moving handle 16 to an unlock position.

In operation ball 10 functions in a standard fashion to cause characters to be printed on document 18. When the punching of a selected index position on document 18 is desired, a key on the typewriter keyboard is struck which causes blank character position 22 on typewriter ball 10 to be positioned adjacent to ribbon 24.

When position 22 is adjacent to ribbon 24 punch insert 14 strikes document 18 causing a chad to be punched out. The chad is removed through channel 26 by vacuum. The force required to perform the punch operation can be reduced by using a document 10 having prescored index positions.

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