Quote:
Originally Posted by bnorth
To the bold section. If the first cut(card sides) is straight the cards side border will be straight with the black frame. It is the second cut(top/bottom) that the cards(cut strips) did not get loaded exactly square that causes the angles on the top and bottom of the card. I know this is true of more modern cards but could be wrong about the cutting process used in 1938.
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Modern cards are cut using more automation, and with cutters that are in many ways better.
Older cutters were largely set manually for size, and were loaded manually. If there was a bit of debris in the cutter, an angled cut could happen.
The paper stack is held in place by a pressure plate, and just like cutting a big stack of paper with scissors, if the paper isn't gripped hard enough for the stack that was inserted, the stack will skew and give you an angled cut. A dull blade can make it worse.
Both are basically rushed/sloppy operation.