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Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

Punched Cards: Storage Trays

Keeping stacks of punched cards under control is important:

Punched cards - storage trays
Punched cards – storage trays

The two on the left fit finished cards and the larger ones fit 1/3 Letter paper raw cards.

The patterns come from boxes.py:

I added a finger slot behind the front opening so I could pick up the whole stack at once:

Punched Card Trays - LightBurn layout
Punched Card Trays – LightBurn layout

Admittedly, my “stacks” are nothing compared to the Bad Old Days, but …

The program adds a sequence number in columns 73-80 as a last-ditch effort to ensure the punch pattern matches the print pattern: after a few dozen cards, the digits in the last few columns become recognizable.

The LightBurn SVG layout as a GitHub Gist:

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