I posted some photos I took of the exterior of the American Book Bindery Building a while ago. When looking through some of the trade catalogues I’ve collected over the years, I was pleased to find this image from the Lamson Company, which specialized in Industrial Conveying. The catalog is not dated, but looks like it is from the 1920’s. The text states the signatures are moving from the folding machine to the gluing benches without first being sewn, which presumably is a mistake. Now there is a little information about what the bindery looked like on the inside.
Coincidences like these make the world seem a much smaller place.