Patent GB-530970-A (GB)
Title: Improvements in folding machines
IPC: B65H45/14
Filed: 1939-04-24
Abstract: 530,970. Folding paper. DAVIDSON MANUFACTURING CORPORATION. April 24, 1939, No. 12270. Convention date, May 2, 1938. [Class 100 (i)] A folding machine fitted with at least three sets of folding devices 10, 20, 30 of the buckling or other type is so constructed that the sheets can be turned through 90 degrees after each fold if desired so that the machine is capable of forming three folds each of which can be either parallel or at right angles to the preceding fold, the sheets being guided between the folding units upon conveyers with which engage a traction means which engage the upper edges of the sheets during substantially the whole of the travel between successive folding units. The sheets are finally delivered by a conveyer 7 comprising delivery rolls 48, 49 and a delivery belt 52 all mounted in a detachable frame which can be arranged to receive the folded sheets from either of the folders 10, 20, 30 a switch 46 being arranged in conjunction with each folder to direct the folded sheets to the subsequent folder or to the delivery rolls 48, 49. The rolls 48 are sectional rolls and are pressed against the rolls 49 with adjustable spring pressure. The frame of the conveyer is connected to the frame 1 of the machine by means of forked members 66 engaging pins 67 on the frame 1, and by spring pressed pins which engage holes in the frame 1. The frame is fitted with adjustable ratchet driving mechanism for the delivery tapes driven by gears adapted to engage gears on the folding rollers when the frame is secured in position. The sheets may be hand-fed over a table, or as shown in Fig. 14 are fed automatically from an inclined pile 205 by rollers 206, 207 209, 210 and finally by inclined belts on to which the sheets are pressed by balls 214 so as to sideregister the sheets before passing to the buckling rollers 11, 12. The buckling plates are fitted with adjustable stops 14a which may be formed with faces 215 adapted to facilitate the passage of the sheet to the final roller 15 when it is desired to pass a sheet through the rollers without folding. When a second fold is required at right angles to the first fold the once folded sheet is scored by rollers 41, 42 and is carried to the second folder by a belt 95 moving over a table 91. The sheet is controlled by an upper guide 101 formed with apertures through which balls 107 project and the sheet can be turned through an angle of 90 degrees when its lower edge engages a projection 116 on a guide formed at its edge with an inclined portion 115 which engages the lower edge of the turned sheet and guides it into the folding rollers 21, 22 of the second buckler. A roller 124 mounted in pivoted arms 125 passes through a slot in the guide 101 and assists in the turning of the sheet. The belt 95 is inclined towards the edge of the guide 115, and if it is desired to turn the sheet clockwise instead of counter clockwise, the inclination of the belt is changed as is also the position of the guide 115 and associated parts which are adjustably secured to cross bars 103, 105. The twice folded sheet may be delivered direct to a delivery device 7, or it may pass to a further feed table 4, which may be arranged so as to turn the sheet in either direction, and from which the sheet passes to a further folding device 30 which is constructed with two buckling-plates for producing two parallel folds. The stops of these plates may be arranged so that the sheet does not enter the plate. The units 10, 20 may be arranged to produce more than one fold, but so that the additional folders may be cut out when desired, and more than three folding units may be used.