Patent GB-589194-A (GB)
Title: Improvements relating to loose leaf binders
IPC: B42F13/30
Filed: 1945-03-19
Abstract: 589,194. Loose-leaf binders. MANIFOLDIA, Ltd., and SIMPSON, A. W. March 19, 1945, No. 6808. [Class 146 (i)] In a loose-leaf binder of the type operated by a co-operating tray, two posts adapted to pass through holes in the leaves are carried by a member forming part of one of the two binding bars when the binder is closed and adapted to be operated upon by the tray mechanism to carry the posts completely out of the space between the binding bars when the binder is closed. As shown the binder comprises two binding bars 10, 11, attached to covers 12 and held together by telescopic guiding posts 33, 34 which contain tension springs. The outer members 35 of the posts 33 are ribbed circumferentially and attached alternatively to the bars 10, 11, Fig. 1. The bar 11 houses a plate 14 carrying two telescopic binder posts 15 containing compression springs and having tapered ends terminating in locating pins which engage recesses in the bar 10. The plate 14 is held in position by spring- urged bolts 24, Fig. 3, engaging recesses 26 in the bar 11 and having slots 28 which are, when the bolts are extended, partly in alignment with holes 29 in the plate 14 and recesses 30 in the bar 11 as shown in Fig. 3, so that when tapered studs 31 are inserted in the holes 29, the bolts are thereby withdrawn, suitable abutment means 32 being provided. The bar 10 carries a screwed rod 39 which is engaged by a spring- pressed pawl 44 pivoted at 42 in a block 40 attached to the bar 11, the pawl being so shaped that the bars may be moved towards one another but may only be separated after movement of the pawl 44 in an anti-clockwise direction, as by the member 58, Fig. 11, has disengaged it from the rod 39. The tray 47 has two socket members 49 to receive the bar 11 and two sliding platforms 51, 52, the platform 51 having two L-shaped lugs 54, the shorter limbs 55 of which engage the inner face of the bar 10, and the platform 52 carrying the studs 31. The platform 52 is attached to a member 68 carrying on its underside a rack 67 engaging with a pinion 66 on a spindle 65 connected by step-up gearing 64 to a spindle 61 which is rotated by a handle. A second set of rack teeth 70 provided in a recess in the member 68, is engaged by a pinion 71 on a vertical spindle 72 supported by the tray and carrying a second pinion 75 of half the diameter of the pinion 71, which engages a rack 76 on a member 77 attached to the platform 51. When the binder is placed on the tray, the studs 31 on the platform 52 are aligned with the supports 49 and enter the holes 29 to unbolt the plate 14, the bar 11 enters the supports 49, the pawl 44 is released by the member 58 and the bar 10 is placed on the platform 51 somewhere between the lugs 54 and the back of the platform according to the thickness of the binder. The spindle 61 is then rotated by the handle, the bar 10 being carried away from the bar 11 to extend the binder to its full width and the plate 14 withdrawing the posts 15 completely from the binder, the posts 33, 34 forming a cradle to support the leaves 13 which are prevented from moving sideways by the ribs on the posts 33, 34.