British and Colonial Printer and Stationer . from. Loose-Leaf Binders. In a loose-leaf binder, invented by Mr. , the leaves are held between clamping-plates by longitudinally adjustable holdingdevices, have unslotted holes surroundingthese, and have slotted perforations to engageguide pins used during the leaf changingoperation. One or both of the clamping-plates are preferably made of soft metal, hav-ing harder metai brushes to receive the screwends of the pins. In the form shown, the rails2, 2^, to which are hinged the covers 3, areclamped together by suitable means, prefer-ably scre
British and Colonial Printer and Stationer . from. Loose-Leaf Binders. In a loose-leaf binder, invented by Mr. , the leaves are held between clamping-plates by longitudinally adjustable holdingdevices, have unslotted holes surroundingthese, and have slotted perforations to engageguide pins used during the leaf changingoperation. One or both of the clamping-plates are preferably made of soft metal, hav-ing harder metai brushes to receive the screwends of the pins. In the form shown, the rails2, 2^, to which are hinged the covers 3, areclamped together by suitable means, prefer-ably screw bolts 4, 5, 7, which hold the leaves1 accurately by engaging the holes 6. For 26 July 1921. refilling, etc., pins n pass throughholes 9 in the plate 2, and through slottedholes 8 in the leaves, and screw into bushes 10in the plate 2. On the release of the clamp-ing devices, the bar 2 is raised and the leavesare slid off the bolts 4, 5 and held only on thepins II through their slotted holes 8, the slots t^^6 ^ 4-8 i2^a-p^~/S jHgr;. operating when leaves are removed or book is backed by flexible material 12suitably slotted, 13, to receive the pins whenthe bar 2 is raised. The screw y of the clamp-ing devices may be turned by means of a rib14 at the end of the pin n. Intermediatebolts may be placed between the bolts 4, 5 toincrease the thickness of the book. riaking Process Plates. In a machine for making printing plateseither for copying or by contact printing, aspatented by Mr. H. C. Boedieker, the pro-
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherlondon, bookyear192
