Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Labeling or embossing indicia
Patent
1981-01-26
1982-07-13
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Labeling or embossing indicia
264521, 264526, B29C 1707
Patent
active
043394094
ABSTRACT:
A method is disclosed for blow molding poly(ethylene terephthalate) preforms, such as injection molded parison, to achieve exterior surface embossed designs on blown containers without using profiled blow mold cavity walls. In the method, a raised profile is molded or otherwise formed on the exterior wall of the preform, defining a preform wall portion having embossed areas. Then the entire preform is heated to blowing temperature and it is also disclosed that when the raised portion is at the same time raised to a higher temperature the embossed design of the preform is opacified by crystallization without crystallizing the balance of the preform. Thereafter, the preform is blow molded under conditions such that the poly(ethylene terephthalate) material strain hardens in order to cause the different wall thicknesses to expand and stretch essentially proportionately. The blown containers with an embossed design formed by this method include a surface contour which is essentially proportionately shaped to the surface profile formed on the pre-existing preforms.
REFERENCES:
patent: 4164298 (1979-08-01), Nishikawa et al.
patent: 4233262 (1980-11-01), Curto
Click M. E.
Lynch Charles S.
Owens--Illinois, Inc.
Silbaugh Jan H.
Wilson D. H.
LandOfFree
Method of forming blown polyethylene terephthalate containers 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 of forming blown polyethylene terephthalate containers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming blown polyethylene terephthalate containers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-203498