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Патент USA US2404966

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July 30, 1946.
Filed sept. '14, 1944 _
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' Inventor
Patented July 30, 1946
Richard J. Kingston, Ogden, Utah
Application September 14, 1944, Serial No. 554,027
1 Claim. (Cl. 25--127)
The present invention relates to new and useful
improvements in tile forming molds for making
opposite end of the mold is flared as at 34 and
formed with inwardly extending tongues 35.
sewer tile.
Concrete in a plastic state is placed in the mold
An important object of the present invention
23 and through the centrifugal action caused by
is to provide a tar paper lining for the mold and
which forms a cover for the completed tile which
the rotation of the mold will cause the tile 3S to
be formed on the inside thereof. The end of the
mold provided with the ring 33 is closed by a
facilitates the stripping of the mold from the
tile after the latter is set and in which the tar
paper cover or jacket for the tile serves to pre*
sectional end plate 33a.
The tapered ring member 33 on the inside of
the mold section will form an externally tapered
portion 31 at one end of the tile while the iiared
portion 36 at the opposite end of the mold will
form the bell or flange 38 thereon.
vent vegetation and tree roots from growing
through tile when the latter is laid, thus serving
to protect the tile from injury commonly caused
by such Vegetation and tree roots.
A core 39 is placed in the flared end 34 of the
A further important object of the present in
mold and is formed with an annular groove 43
Vention is to provide a mold of this character and
adapted to receive the tongues 35 of the mold to
which, through the use of the tar paper jacket or
retain the core in position. The core is shaped
lining in the mold permits the removal of the
to form the flared seat 4| in the bell end of the
mold after the tile has become set and prior to
tile as well as the shoulder 42 to accommodate
the complete hardenings thereof, whereby a rela
tively small number of molds are required in the 20 the tapered end and abutment for the end of an
adjacent tile when laid in end to end relation.
quantity production of the tile.
After the concrete has become set to form the
A still further object of the invention is to
tile the mold 23 is removed and the tar paper
provide a mold of this character of simple and
lining 32 then forms a jacket or cover for the tile
practical construction, which is efficient and
reliable in performance, relatively inexpensive to 25 to hold the latter in its proper shape while the
same becomes hardened suii‘lciently for use.
manufacture and otherwise well adapted for the
When the tile is laid the tar paper jacket is
purposes for which the same is intended.
retained thereon and serves to prevent vegetation
Other objects and advantages reside in the de
and tree roots from injuring the tile and serves.
tails of construction and operation as more fully
hereinafter described and claimed, reference be 30 as a deterrent for the roots working between the
connected section of the tile.
ing had to the accompanying drawing forming
The tar paper also functions to aid in the cur
part hereof, wherein like numerals refer to like
ing of the tile while becoming set as the tar paper
parts throughout, and in which:
prevents quick evaporation of moisture in the tile
Figure 1 is a side elevational view of the mold.
Figure 2 is a longitudinal sectional View there 35 and with the addition of a suitable curing oil to
the inside of the tile utilizes the moisture in the
of, showing the tile formed therein.
tile for curing. The tile need not be constantly
Figure 3 is a sectional View taken substantially
sprayed with water or placed in a curing chamber
as now customary, but may be immediately moved
to my invention, a longitudinally split cylindrical 40 to a shed or other storage space for Curing.
It is believed that the details of construction
mold 23 is provided adjacent its ends with a pair
and manner of use of the device will be readily
of diametrically split channel guide bands 23
on a line 3-3 of Figure 1.
Referring to the drawing in detail, according
understood from the foregoing without further
thereon for receiving driving pulley of a mold
detailed explanation.
rotating machine, not shown, of a type suitable
for rotating the mold to form the tile therein 45. Having thus described the invention, what I
under the action of centrifugal force.
claim is:
The sections of the mold are secured in assem
bled relation by means of a pair of clamping
bands 24 Operated into clamping position by
means of a lever 25 pivoted to the ends of the
clamping bands. Each section of the mold is also
provided with guide tongues 26 overlapping the
adjacent edge of the respective section to guide
the latter into assembled relation with respect to
each other.
A tar paper lining 32 is secured to the inside of
the assembled mold sections, the lining being con
tinuously formed.
To the inside of each mold section, at one end
thereof, is a tapered ring segment 33 While the
A tile forming mold comprising a pair of semi
cylindrical sections, means for clamping the sec
tions in assembled relation, a tapering ring in one
end of the sections of the mold, an end plate
closing said end of the mold, a flared end at the
other end of the mold «and having inturned
tongues and a core removably inserted in said
last-named end of the mold, said core having
an annular groove adapted to receive said
tongues for retaining the core in position therein,
said last-named end and the core forming a
bell mouth end on said mold for molding a tile
with a bell mouth end.
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