Patent GB-1034647-A (GB)
Title: Article sorting system
IPC: B07C3/08
Filed: 1963-04-26
Abstract: 1,034,647. Sorting articles; endless and reciprocating conveyers. FMC CORPORATION. April 26, 1963 [April 30, 1962], No. 16459/63. Heading B8A. General arrangement, Fig. 1; Figs. 4, 6, 14 (not shown).-Articles or parcels X to be sorted are swept off a delivery conveyer 50 by diverter gates 52 which direct the parcels via slides 54 on to endless feed conveyers 58. A facing operator at each feed conveyer orients the parcels for address or label reading by a coding operator who enters on a keyboard 68 destination information for transfer to an automatic control for the sorting system. A reading conveyer 64 transports the parcels to an associated primary conveyer P where each parcel operates a photo-sensor unit PEP which enters the destination information into a primary memory drum, Fig. 14. When the parcel reaches a primary diverter PD, a signal from the memory drum to the diverter causes the parcel to be transferred into a " buffer " storage conveyer BC having three gates A, B, C. Simultaneously, destination information is sent from the memory drum to the first of three stages of a buffer register. After passing through the three gates A, B, C, the parcel is moved along a secondary conveyer Sa-Sd or S1-S6. The parcels on the conveyers Sa-Sd run out to the end of their respective conveyers but those on the conveyers S1-S6 are diverted to slides 76 or 76a for sacking at stations 78, 78a. Secondary diverters SD are controlled by a secondary memory drum which receives destination information from the buffer register via a secondary storage unit. Parcels coded for a buffer that is filled are carried along the entire length of the primary conveyer, on to a circulation conveyer R which reintroduces the articles into the system. The conveyer P has a higher linear speed than that of the reading conveyer 64 and hence increases the article spacing. The speed of the conveyer 64 is controllable by the coding operator. The operation of circuits controlling the buffer storage conveyers and the spacing of parcels on the secondary conveyers is described in detail with regard to Figs. 15-19 (not shown). The sorting of articles in warehouses and for manufacturing operations is specified. Buffer conveyers, Figs. 7-9 (not shown).- Each conveyer comprises a steel belt 178 with rubber V-belts bonded to its inner surface. The three gates A, B, C are pneumatically operated and each has a pair of photo-sensor units associated with it. The sensors provide for automatic operation of the conveyer so that parcels are automatically stepped from gate to gate and eventually released on to the secondary conveyers. Some of the sensors additionally provide pulses into the buffer register so that the latter can transfer destination information to the secondary memory drum. The photosensor PHAL at gate A of an upstream buffer also prevents the next downstream buffer from releasing a parcel on to the same portion of secondary conveyer about to be occupied by the parcel released by the upstream buffer. Minimum parcel spacing along the secondary conveyer belts is thus established. Secondary diverters, Figs. 6A, 6B (not shown). -A pusher plate 147 is supported by resilient straps 133, 138, crank connectors 131, 136 and rigid bars 128, 134. Slide blocks 126, 127 are located in channel-shaped upper links 124, 125 and are connected to the bars 128, 134. The links 124, 125 are suspended from a pivot shaft 123. The pusher plate 147 is normally positioned at T.D.C. of its path of travel and when a parcel is required to be diverted from the conveyer S1, crank arms 171, 172 are driven through one revolution in the desired direction by a motor 167. A horizontal path of movement by the plate 147 during its pushing motion is ensured by cams 158 which are engaged by followers 154.