GB1016196A - Apparatus for packaging envelopes - Google Patents

Abstract

1,016,196. Wrapping-machine. R. WINKLER, and K. DUNNEBIER. July 11, 1963 [July 31, 1962], No. 27511/63. Addition to 896,220. Heading B8C. [Also in Division B6] In a modification of the wrapping apparatus in the parent Specification, the conveyer stops are arranged in pairs on two pairs of chains, the delivery discs having grippers and leaf springs feed the envelopes individually to the conveyer stops, the batching stops are arranged in path of the envelopes during the time when no conveyer stops are in position to receive the envelopes and the banding mechanism has suction devices for moving the band from the pile to the envelopes, a device for applying adhesive, a lower band applier which pulls the band downwards and then folds it upwards over the upper end of the band and a gripper having nozzles for holding the upper end of the band and later blowing it downwards. The envelopes are fed singly to the collecting station P by a suction roller 1 and delivery discs 2, influencing a photo-electric cell 84 which actuates the wrapping mechanism after a fixed number has been collected. The batches of envelopes are conveyed to the wrapping station while positioned between the pairs of conveyer stops 33, 34 which are mounted on chains 3, 8 for relative adjustment to accommodate different batch sizes. The conveyer stops are constrained by the chains to follow a path, Fig. 1, which causes them to move vertically beneath a batch being collected from the discs 2 against withdrawable batching stops 46, 49. In lieu of these stops, leaf springs may be provided (Fig. 10, not shown). The envelopes pass through an intermediate station P<SP>1</SP> to the banding station P<SP>11</SP>, the packet moving against the band W having adhesive applied to one end which is stretched transversely across its path and held at its rear end by suction holes 76 of a band applier 74 in its lowest position 74<SP>1</SP>, Fig. 4, and at its upper end by leaf springs 81 on band guides 63, Fig. 1. A gripper 51 pivots downwards from the position 51<SP>1</SP> and the band is held by suction from a nozzle 56, Fig. 4, the upper end being pulled free from the leaf spring. The end is then blown downwards against the back of the packet by compressed air from the nozzle 56. The band applier moves upwards, Fig. 6, pulling tight the band which is held first by the suction holes 76, then by the suction holes 77 and pressing the two ends together by a roller 75, Fig. 9, while the band is secured against displacement by a suction nozzle 88. Meanwhile a suction device 64 has sucked the end of the next band from the bottom of a pile 62 and pulls it along the guide 63 during which time it receives adhesive from a gummer 69. A second suction device 71 pulls it further downwards and transfers it to the band applier 74. An upper batch guide 42 adjustable for various envelope heights is provided.