Improvements in the Method of and in Means and Appliances for Bending and Shaping Sheet Glass.
Year: 1894

page_text: Date of Application, 8th Dec., 1894
Complete Specification Left, 9th Sept., 1895-Accepted, 12th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Method of and in Means and Appliances
for Bending and Shaping Sheet Glass.
I, WILLIAM CUTLER, of Cannon Works, Constitution Hill, Birmingham, in
the County of Warwick, Manufacturer, do hereby declare the nature of my said
invention to be as follows:—
The object of my invention is to effect improvements in the method of, and in
means and appliances for, bending and shaping sheet glass.
My invention consists in the application of atmospheric pressure to one side of
a sheet of glass, by withdrawing such pressure from the other side of the glass,
while heated and held in position upon a suitable mould.
I form the mould of cast iron or other suitable metal. A flange is formed round
the outer edge of the mould to receive the edges of the glass, and support it in
position while under treatment. At any convenient part or parts of the mould
(according to the shape of the mould) I form one or more opening or openings or
passages, and fit the same with eduction pipes for withdrawing the air from the
mould and the underside of the glass.
In order to hold the glass firmly upon the flange of the inould, a suitable frame
is provided, which acts as a clip or weight to the outer edge of the glass, holding it
in close contact with flange of the mould.
The mould is heated in the ordinary manner in a bending kiln or oven.
The
glass to be shaped is fitted to the mould and held in position by the frame er clip.
The air is then withdrawn from under the glass by means of an air-pump or other
well-known means for forming a vacuum. The pressure of the atmosphere then
acts upon the outer surface of the heated glass, bending the same to the shape of
the mould.
My invention is applicable to all kinds of flat glass, such as plate, sheet, and
crown glass.
Dated 6th Dosamban 1001
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements in the Method of and in Means and Appliances
for Bending and Shaping Sheet Glass.
I, WILLIAM CUTLER, of Cannon Works, Constitution Hill, Birmingham, in
the County of Warwick, Manufacturer, do hereby declare the nature of my said
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of my invention is to effect improvements in the method of, and in
means and appliances for, bending and shaping sheet glass.
My invention consists in the application of atmospheric pressure to one side of a
sheet of glass, by withdrawing such pressure from the other side of the glass, while
heated and held in position upon a suitable mould.

page_text: I form the mould of cast iron or other suitable metal: A flange is formed round
the outer edge of the mould to receive the edges of the glass, and support it in
position while under treatment. At any convenient part or parts of the mould
(according to the shape of the mould) I form one or more opening or openings or
passages, and fit the same with eduction pipes for withdrawing the air from the
mould and the underside of the glass.
Inorder to hold the glass firmly upon the flange of the mould, a suitable frame
is provided, which acts as a clip or weight to the outer edge of the glass, holding it
in close contact with the flange of the mould.
The
The mould is heated in the ordinary manner in a bending kiln or oven.
glass to be shaped is fitted to the mould and held in position by the frame or clip.
The air is then withdrawn from under the glass by means of an air-pump, or other
well-known, means for forming a vacuum. The pressure of the atmosphere then
acts upon the outer surface of the heated glass, bending the same to the shape.of
the mould.
My invention is applicable to all kinds of flat glass, such as plate, sheet, and
crown. glass.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar figures of reference indicate. corresponding parts.
Fig. 1 is a sectional elevation showing the apparatus previously to the operation
of heating and bending the glass.
Fig. 2 is a similar: elevation of the apparatus showing the method of operating
upon the glass.
The
3 is the mould, which may be of any required form. 4 is the eduction pipe,
screwed to any convenient part of the mould, for exhausting the air from under
the glass. 5 is a frame which is made sufficiently heavy to hold the glass in
position previously to and during the operation of heating and bending.
frame 5 may be further secured by means of clamps. The glass 6 is placed in
position, as shown in Fig. 1, with the frame resting upon it. The whole apparatus
is then heated, and the air is withdrawn by the pipe 4; the heating process being
continued until the glass assumes the required form.
Having now particularly described and ascertained the nature of my.said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. The method of bending and shaping sheet glass by means of a mould suitably,
formed, upon which the glass to be operated upon is held, and from the underside
of which glass the air is withdrawn by means of a.pump or other .well-known means
for producing a vacuum, the mould and glass being suitably heated in a kiln or
oven, substantially as herein, before described and illustrated by the drawings.
2. In an apparatus for bending and shaping sheet glass, the combination of a
mould, on the outer edge of which the edges of the glass are supported; an eduction
pipe for exhausting air from, the interior of the mould, and a weighted frame
bearing against the edge portions of the glass, and holding the same in close
contact with the edge of the mould, substantially, as and. for the purposes. herein
before described and illustrated by the drawings.
3. The improvements in the method of, and in means and appliances for, bending
and shaping sheet glass, substantially as herein before described-and illustrated by
the drawings..
Dated 7th September 1895.
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.