B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 55/18 (2006.01) B29C 43/24 (2006.01) B29C 55/06 (2006.01)
Patent
CA 2175147
An apparatus and method for producing an oriented plastic strap having a predetermined desired thickness and flatness characteristics for use in connection with the strapping of packages or the like, is disclosed. A sheet workpiece is conducted into a nip defined between a pair of opposed milling and stretching rollers wherein one of the rollers is rotated at a lineal surface velocity which is greater than the lineal surface velocity of the other roller and the rollers are rotated in opposite directions. One of the rollers effectively brakes or retards one of the surfaces of the sheet workpiece while the other one of the rollers effectively accelerates the other one of the surfaces of the sheet workpiece as the workpiece passes through the nip defined between the rollers whereby the workpiece is simultaneously milled and stretched. The workpiece is heated along its side portions disposed inwardly from the side edge portions so as to eliminate concavities and bump transitional points which normally tend to form at and within the vicinity of the side portions and in addition, the side edge portions of the sheet workpiece are also heated so as to cooperate with the heated, axially inward side portions so as to advantageously control the degree of flatness of the sheet workpiece across the width thereof after the same has been milled and stretched.
Enriquez Manuel C.
Van Erden Donald
Finlayson & Singlehurst
Illinois Tool Works Inc.
LandOfFree
Method and apparatus for producing oriented plastic strap,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for producing oriented plastic strap,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for producing oriented plastic strap,... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1631811