Patent GB-739387-A (GB)
Title: Sheetbinding apparatus
IPC: B42C9/00
Filed: 1953-02-24
Abstract: Apparatus for binding sheets together comprises a support for sheets piled thereon, aligning means in association with the support for abutting the supported sheets so that the binding edges are aligned, pressure-applying means for pressing the aligned sheets together close to the binding edges, a closable container for flexible-film-forming solution such as a colloidal rubber solution, a device for applying the solution to the binding edges and closure means for automatically closing the container when the apparatus is not being operated.  The casing comprises sides 1 and a downwardly inclined top surface 1A forming a tray into which sheets can be placed with their binding edges slightly overhanging the front edge 1B and resting against ribs 2A on a stop member 2.  A removable plate 1C closes the front of the casing and <PICT:0739387/III/1> <PICT:0739387/III/2> <PICT:0739387/III/3> a curved pivoted plate 1D with its edge resting on the stop member 2 to be moved thereby is mounted on a cross shaft 3A to cover the working parts.  A pad 3 is mounted on arms 3B, 3C to move towards and away from and parallel to the sheets, the arms 3C being pivoted at 3D to the casing and the arms 3B mounted on the shaft 3A on which an operating handle 11 is also mounted.  The solution container 4 extends below the edge 1B of the tray under the stop member 2 and comprises a cylinder with a long slot 4A having inwardly directed edges 4B, and shoulders 4C may be provided to restrict capacity.  The slot 4A in the rest position of the apparatus is sealed by the head 9B of the solution-applying blade 9A, formed of flexible rubber, which is mounted by means of a metal plate 9C sliding over the lower part 9D of the stop member 2.  The stop member 2 is pivoted out of the way of the binding edges and lifts the blade 9A into contact with the edges by means of pairs of arms 10A, 10B pivotally connected to the member 2 on axes 10C and 10D, the arms 10A being shorter than the arms 10B so as to give a turning movement to the stop member 2 and blade 9A. The arms 10A are mounted by linch pins 13A to brackets 13 upstanding from the casing and the arms 10B form rearward extensions of lever plates 12 at each side of the machine pivotally carried by shafts 12B, and held normally in their lowest position by coil springs 12C.  The operating handle 11 has downward extensions 11B at each side carrying a shaft 11C, parallel to shaft 3A, which can ride along an edge 12A of the lever plates 12 ending in a detent 12D.  A rod 11A is fixed to the arm 3B and is abutted by the forward side of the handle 11, tension springs 11D between the top of the handle 11 and the rod 11A tending to maintain them in contact.  On pushing the handle 11 downwardly, the rod 11A moves therewith to swing the arms 3B about the shaft 3A till the pad 3 is pressed against sheets held on the tray 1A; further downward movement of handle 11, allowed by the stretch of springs 11D, moves the lever plates 12 by the rod 11C in the detent 12D to swing the stop member 2 and blade 9A upwardly and forwardly so that the blade 9A wipes the edges of the sheets. The springs 11D and 12C return the parts to the normal position. The container 4 is removably mounted in holes in each side 1 of the casing and has integral lugs 4D which receive screws 4E.  An integral tubular chamber 5 is formed outwardly of the lugs 4D and has a vertical portion 5A and a portion 5B inclined to the vertical which is open and internally threaded to receive a reservoir 5C.  The reservoir 5C has an opening 5D closed by a spring-pressed valve ball 5E adapted to be pressed upwardly and side-wardly by a needle 6 when the reservoir is screwed into position and the apparatus is on a flat surface.  The needle 6 is mounted to slide in a washer 6A within a sleeve 6D of a diaphragm 6C closing the lower end of the chamber 5 and a spring 6B holds the needle in its lowest position.  A bellows gland 6E is arranged to prevent escape of liquid from the chamber 5.  A cup 7A with a downward projection 7E is reciprocable in the lowest part 7 of the chamber 5 and is urged downwardly by a spring 7C against an annular clip 7D.  A cover 7B closes the cup 7A and the lower end of the needle 6 projects centrally into the cup 7A which has a curved dished lower surface 8A on which a ball 8 rests.  When the apparatus is placed on a flat surface, the projection 7E is pressed upwardly and the ball 8 underlies the needle 6 so that the needle 6 is also pushed up to move the ball 5E out of the opening 5D.  The angle of the reservoir 5C is to improve the flow of the rather viscous liquid.  The length of stroke of the blade 9A may be varied to suit binding a large or small number of sheets by incorporating suitable adjusting mechanism.  The apparatus may be made in varied sizes so as to take standard sizes of paper sheets.