Pleger, John J · Chicago : The Inland printer company · leaf 32
of pen. The size number of thepens in the box can be lettered on the outside to enablethe ruler to pull out the drawer desired in a moment.This system is by far the most advantageous and shouldbe adopted in all ruling-rooms. Cleaning Pens.— When using dark blue, red, greenor purple on horizontal… … Pen Cabinet and Trays. 22 BOOKBINDING Unit pens on which three colors are used should be cleanedin like manner. When double or triple pens are used forother colors besides red, clean them in the same manner. When pens become clogged and the machine is inoperation, insert a thin scraper and effect…
Bookbinding
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