B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 9/06 (2006.01) B65B 51/30 (2006.01)
Patent
CA 2338904
A sealing apparatus includes a plurality of pairs of upper and lower sealing die assemblies which travel around upper and lower pairs of oval tracks. Each of the oval tracks incudes upper and lower horizontal portions and front and rear curved end portions. Each pair of die assemblies is driven independently of the other pairs. Each of the die assemblies includes a pair of carriages which are supported by the tracks and a sealing die which extends between the carriages. A pair of bogie arms are pivotally mounted on each of the carriages, and a pair of rollers which are rotatably mounted on each bogie arm ride on one of the tracks. In use and in line with the method of the invention the sealing apparatus seals a series of products in a plastic film as the products and film are advanced along a horizontal path which extends between the upper tracks and between the lower tracks. A first pair of upper and lower sealing dies engage the film behind a first product and in front of a second product as the first dies move along the curved rear end portions of the tracks. The first dies push the film against the rear of the first product and seal and sever the film as the first dies move along the horizontal portion of the tracks. A second pair of dies engage the film behind the second product and repeat the sealing and severing operation.
Brugman Matt L.
Ginzl Jeffrey A.
Hopkinson Brian L.
Monigal Neal R.
Nankervis Wayne T.
Finlayson & Singlehurst
Paper Converting Machine Company
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