GB453165A - Improvements in and relating to wrapping machines - Google Patents

Abstract

453,165. Wrapping-machines. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (National Bread Wrapping Machine Co. ; 132, Birnie Avenue, Springfield, Massachusetts, U.S.A.) March 9, 1935, No. 7450. [Class 94 (i)] A wrapping-machine of the type described in Specification 426,453 is provided with means for controlling the positioning and application of the wrapper. The wrapper web 26 is drawn over guide rolls 27, 28, 29 by rollers 30 provided with a pawl-and-ratchet or like feeding device, and, when the carrier 10 is in its upper position, passes over a shelf 31 to grippers 40 actuated to pass beneath the carrier, seize the end of the web, and draw it to the right, Fig. 1. When the carrier sinks to the lower position, the web is cut by a knife 34 which is raised into engagement with a cutter block 33 beneath the carrier. The article is fed from a table 15 to the left, by a plunger 16 and arrives on the carrier, taking the wrapper with it and clamping it against a backing plunger 18. The parts are now as shown in Fig. 3. During the movement of the article, the upper part of the wrapper is controlled by a rubber roll 54 on arms 53, which presses it on to springs 51 on a bar 45, adjustably mounted for a limited vertical reciprocatory movement. The roll 54 is provided with an adjustable spring brake, and, with the springs 51, serves to keep the wrapper straight irrespective of irregularities in the shape of the article. As the carrier rises, the arms 53 turn downwards into the position shown in Fig. 4, having disengaged from the springs 51, owing to the limited ascent of the bar 45, and press the wrapper against a roll 56 on the carrier. In the top position, the roll 54 is pressed firmly into contact with the roll 56 bv the action of shoes 57 mounted on the underside of the delivery channel 17. The folding is completed when the article is moved to the right along the delivery channel by an arm 20 on an oscillating shaft engaging an abutment 19 on the backing plunger 18. The movement is continued by paddles 23 pivoted at 24 to a chain 22 and controlled by links 25 connecting an extension of the paddle with a point on the chain, so that, on rounding the sprockets, each paddle is tilted rearwardly to produce sufficient spacing for the article to rise.