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Punched Hole Technique to Neutralize Web Feed Inaccuracy

IP.com Disclosure Number: IPCOM000091928D
Original Publication Date: 1968-Jul-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Colmer, PA: AUTHOR [+2]

Abstract

This technique insures that a web preprinted repetitively to one card length, e.g., 8 1/2", can be accurately cut down to a shorter length, e.g., 7 7/8" including a 1/2" stub. Equipment having a web feed mechanism with an inherent tolerance exceeding permissible cut card length tolerances is used. After being preprinted with an 8 1/2" repetitive pattern in a rotary press not shown, web 1 is advanced intermittently leftward 8 1/2". Reciprocable unit 2 descends to punch and score the web simultaneously at five places while it is stationary and supported on die base 3. Punches 4 make holes A extending somewhat rearward of what becomes the trailing edge of one card T. Meanwhile in card L directly ahead of T, blade 5 makes cuts B linking certain of the holes A previously punched on it by 4.

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Punched Hole Technique to Neutralize Web Feed Inaccuracy

This technique insures that a web preprinted repetitively to one card length, e.g., 8 1/2", can be accurately cut down to a shorter length, e.g., 7 7/8" including a 1/2" stub. Equipment having a web feed mechanism with an inherent tolerance exceeding permissible cut card length tolerances is used. After being preprinted with an 8 1/2" repetitive pattern in a rotary press not shown, web 1 is advanced intermittently leftward 8 1/2". Reciprocable unit 2 descends to punch and score the web simultaneously at five places while it is stationary and supported on die base 3. Punches 4 make holes A extending somewhat rearward of what becomes the trailing edge of one card T. Meanwhile in card L directly ahead of T, blade 5 makes cuts B linking certain of the holes A previously punched on it by
4. Blade 6 makes long cuts C to provide short transverse ties X to stub portion
S. Blade 7 makes a full transverse cut at D to define the leading edge of L. Simultaneously, blade 8 makes cuts E from the outer edges of L to, and between, those holes A not previously linked by cuts B. Thus, scrap chip 9 is severed from the trailing edge of S in foremost card F.

Holes A have a width Y greater e.g., .055" than the card to cutoff feed error, e.g., .030", of the feed mechanism. As shown, the trailing edges of A extend at least .010" rearward of 3 and 16.355" rearward from cutoff blade 7. Cuts B define the working trailing edge of the...