Pleger, John J · Chicago : The Inland printer company · leaf 222
samekey that unlocks the binder operates the controlling screw (200) LOOSE LEAF BINDERS 207 rod, which expands and contracts the mechanism. Thereis no key in existence that will unlock more than onebinder; no sheets can be removed or inserted without aparticular key. The mechanism is so finely… … Expansion Loose-leaf Back(Chicago Binding and File Co.) The cover should be made of the best quality ofbinders board, built up, beveled, round-cornered and cov-ered with a strong material such as corduroy, moleskin,cowhide or pigskin. To bind, wash the metal with a solu-tion of one part muriatic…
Bookbinding
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