I learned something very cool yesterday. Of course, I'm a science geek, but I still thinks it's cool enough to share.
I'm in Los Angeles this week, doing what I hope will be ongoing programming work for a new client. The client is a big printing facility that spits out reams of paper by the minute, sorts, collates, folds, stuffs, and meters. If you've ever received a one-page explanation of benefits from your health insurance company, or a huge booklet with all the legalese for your policy, this is the kind of place that produced it.
I went on a tour of the facility yesterday afternoon. Among the huge laser printers and folding/inserting machines chained together like a mechanical version of the Human Centipede was a big blue roll printer. It was fascinating to watch in action. At one end was a giant roll of white paper, about six feet in diameter and 17 inches wide. The paper was fed at high speed into a unit that printed two pages side by side. As it emerged from that unit, the continuous paper strip went through a complex series of rollers, some set at a 45-degree angle, that turned the paper over so the blank side was facing up as it went into the next printer. As the paper emerged, now printed on both sides, a blade sliced it lengthwise. The two narrow side-by-side strips were then brought together, one on top of the other, and fed into a cutter that chopped them up into perfectly collated stacks of 8.5 x 11" duplex-printed paper.
That was cool enough, but I noticed that as the paper emerged from the machine that sliced it lengthwise, it passed beneath a piece of wire that had obviously been juryrigged. The wire was wound with a spiral of tinsel, the kind you'd use to decorate a Christmas tree. The tinsel brushed the paper as it sped past.