Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1988-07-20
1990-08-07
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
249141, 425 84, 425812, 425817R, B29C 6722
Patent
active
049463632
ABSTRACT:
Vents for molds can be improved if, in place of a single relatively large vent opening, there is used a vent which has a plurality of relatively smaller vent openings in which the cumulative cross-sectional area of the relatively smaller vent openings are approximately the same as that of the relatively larger vent opening it replaces. It was also found that the vents have a more efficient self-cleaning capability if the ratio of the depth of each vent opening to the cross-sectional diameter of the vent opening is about 1 or less.
REFERENCES:
patent: 3160928 (1964-12-01), Smillie
patent: 3230590 (1966-01-01), Schaible et al.
patent: 3572421 (1971-03-01), Mezey et al.
patent: 3771928 (1973-11-01), Gostyn et al.
patent: 3844523 (1974-10-01), Wilheim
patent: 3871060 (1975-03-01), Ladney, Jr.
patent: 3880557 (1975-04-01), Nelson
patent: 3889919 (1975-06-01), Ladney, Jr.
patent: 4026512 (1977-05-01), Holt
patent: 4333899 (1982-06-01), Hogan et al.
patent: 4354656 (1982-10-01), Kain
patent: 4555087 (1985-11-01), Wallner et al.
patent: 4721279 (1988-01-01), Oleszko et al.
Chiesa Richard L.
Deppenbrock Bonnie L.
Union Carbide Chemicals and Plastics Company Inc.
LandOfFree
Mold and mold vent does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mold and mold vent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mold and mold vent will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-957333