Static molds – Container-type molding device – And an inner removable core to form recess or opening
Reexamination Certificate
2009-01-09
2010-11-16
Nguyen, Khanh (Department: 1791)
Static molds
Container-type molding device
And an inner removable core to form recess or opening
C249S146000, C249S148000, C249S207000, C249S205000, C249S083000, C249S091000, C249S093000, C425S110000, C425S117000, C425S127000, C425S472000, C425S438000
Reexamination Certificate
active
07832703
ABSTRACT:
At the filling station of a dry cast pipe making machine for making pipe lined with a plastic liner, the liner is first placed over the core and then a plurality of spaced-apart, removable L-shaped plates are secured around the top edge of the core. One leg of each plate extends inside the core with the other leg extending downwardly over the top edge of the liner. The plates are removably held in place on the core by the use of a clamping device, such as a vise-grip, for example. Once the form is filled with concrete and ready for the pressure heading step, the downwardly extending legs of the plates serve as ‘shoehorns’ to guide the pressure header over the top of the liner and prevent damage to it. In addition, the plates will assist in centering the core within the jacket.
REFERENCES:
patent: 3900179 (1975-08-01), Mocny et al.
patent: 3967806 (1976-07-01), Strickland et al.
patent: 4708621 (1987-11-01), Schmidgall et al.
patent: 5005801 (1991-04-01), Giarrocco et al.
patent: 5522579 (1996-06-01), Rock
patent: 5720993 (1998-02-01), Schmidgall
Schmidgall Jon A.
Stoller David E.
Hawkeye Concrete Products Co.
Huda Saeed M
Nemmers James C.
Nguyen Khanh
Shuttleworth & Ingersoll, PLC
LandOfFree
Apparatus and method for protecting lined concrete pipe... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for protecting lined concrete pipe..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for protecting lined concrete pipe... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4230803