Patent ID: 6122894
Filing Date: 2000-09-26
Classification: B65B

Abstract:
An apparatus for making a wrapper from heat-sealable paper for a product, comprising: a feed device with a pair of motor-driven rollers whose lateral surfaces oppose each other; an area for unwinding a web of heat-sealable paper, from which a first web of paper, used to make the wrapper and having position references impressed on it, is continuously unwound by the feed device; a station for feeding products which continuously receives and feeds out the first web of paper while placing the products on the web in succession and spaced equally apart; a station for feeding a second web of heat-sealable paper, where the second web of paper, fed by the feed device, is laid over the products and moves along continuously together with the first web of paper below it; a sealing station where the two webs of paper are joined crossways and lengthways to form a chain of closed wrappers, each containing a single product, the apparatus wherein said pair of rollers comprises first sealing elements to seal the two webs together at least crossways and wherein means are comprised for automatically detecting the misalignment of the sealing elements relative to the position references impressed on the first web and correcting the misalignment by causing a controlled relative slipping action between the rollers and the first web.