Patent GB-617264-A (GB)
Title: A new or improved machine for moulding and wrapping blocks of butter, margarine or other products of similar consistency
IPC: B65B25/06
Filed: 1946-04-12
Abstract: 617,264. Wrapping-up. ETABLISSEMENTS SIMON FRERES. April 12, 1946, No. 11281. Convention date, Jan. 23, 1945. [Class 94 (i)] [Also in Group V] A machine for moulding and wrapping blocks of butter or like products comprises means for feeding the material intermittently into a measuring chamber where it is shaped into a block, cut off, and ejected into a wrapping chamber which is mounted on a horizontally reciprocating carriage, and means for feeding to the block a sheet of paper which is taken with the block into the wrapping chamber and has its ends folded down over the upper surface of the block by the movement of the carriage. In the form shown butter is fed by an Archimedean screw 2, rotated intermittently and co-operating with a driven roller 3, into the moulding chamber 7 to be gauged. Below the chamber 7 and above the open upper end of the wrapping chamber 42 a sheet of paper is fed to rest on two guide plates 45, 46. On sliding a. plate 36 to one side the block is forced downwardly by a hollow piston 9 operated by a guide 12, into the wrapping chamber 42 whereby the paper is applied to the bottom and two sides of the block. The wrapping chamber 42 on the carriage 41 is moved to the left whereby the plate 45 folds down one side of the paper, and then to the right to fold down the other side, by a cam 43 on the shaft 23 and by means of appropriate levers and connecting rods, a spring 44 returning the carriage towards the left. To the carriage 41 are attached two pivoted levers 49 carrying two pivoted links 52 connected by a coupling member 53 on which are mounted two suction nozzles 57 connected by a flexible pipe to the suction pump 58. The nozzles 57 contact and cause to adhere to them the upper sheet of a pile of paper 59 in a magazine 60, by the inclination of the levers 49 on contacting the abutments 61. The suction is created by the sudden release of the roller 64 by the cam 62 which frees the tensioned spring 63 to move the piston 66 upwardly. On rightward movement of the carriage 41 the nozzles rise to lift a sheet of paper. This is finally located over the guide plates 45, 46 when the cam 62 engages the roller 73 and forces the piston 66 to uncover the orifices 74 whereupon the sheet of paper falls on the plates 45, 46. When the block is in the third position of the carriage (Fig. 4), the cam 88 engages the roller 89 and, through an arm 90 moves the bracket 82 and the folding mechanism downwards. The knives 76 fold the horizontal upper part of the tube of paper downwards as they come down. The axis 81 in moving downwards causes the blades 78, 781 to close, so that their ends 78<11> fold in the edges. In completing the downward stroke the spring 86 enters the notch 87 of the support 77 before upward motion causes the blades 78, 78<1> to smooth down the remaining triangles of paper 4711. The folding mechanism continues to move up as does the bracket 82 and attains its initial position (Fig. 1). The cam 92 then engages a roller 93 and, through the lever 94 and the link 95, actuates a rod 96 to move out the wrapped block, the piston returning by spring action to its previous position. The screw 2 is driven by rotation of the clutch collar 103 driven through a peg by the actuating sleeve 33 when in contact with it because of the pressure of the spring 108. This happens when the spring in an extensible connecting- rod 301 connecting the levers 30 and 302 is compressed to its maximum by means of a cam 303 so that the rod 301 pushes the lever 30. The declutching of the screw 2 and the roller 3 for feeding the butter is obtained by the displacement of the valve 11, the lever 26 and the connecting rod 28 whereby the lever 29 releases the lever 30 and the clutch collar 103 is moved to the left. In declutching the lever 30 displaces a cam 31 oscillating about an axis 31<1>, said cam 31 functioning to start and stop the shaft 23. The valve 11 is moved when the box 7 is full. At this moment the cam 31 is freed by a peg 35 fixed on the ring 32 held back until then and disengaged from the control sleeve 33. The ring 32 is urged suddenly by the spring 34 and engages the sleeve 33 so that the cam shaft makes a complete turn. In normal working the roller 111 controlled by the cam 62 prevents the pivot 112 engaging with an abutment 113. Lack of paper in the magazine 60 when the cam 62 releases the roller 64 and frees the spring 63 causes the piston 66 to return to the top of the cylinder. The abutment 113 on the operating lever of the piston oscillating about an axis 114 takes with it in its movement the pivot 112 which controls a bolt 115, the withdrawal of which frees a locking rod 116 which under the influence of a spring 117, pushes a lever 118 causing the declutching of the friction clutch 109 associated with the driving pulley 110. To restart, some paper is put in the magazine 60 or a sheet put on the guide plates 45, 46 and the starting lever 119 pressed to the left, the clutch 109 and the bolt 115 of the locking rod 116 then operating to restart the machine.