The Scranton tribune. [volume] (Scranton, Pa.) 1891-1910, 1894-01-19
BONITA GLASS machine
The Second Test Is a Most Successful One and
: PleaSeS ALL Concerned.
GLASS MAKING REVOLUTIGEIzED
He Has Also Benefited the Industry in
Many Other Ways by Patenting a
Grinding Machine and Also an An
healing Oven-Scranton Capitalists
Are Members of the Company
Details of Test. lJ

The practical test of the Bonita plate
glass rolling machine made at the
works Of the Pusey & Jones company
at Wilmington. Del, which came off
yesterday, was very satisfactory.
The test was made with plates repre-.
senting Lincoln's war cabinet, and
the hot glass when poured on the plate
which contained the matrix was most
successfully cast, making handsome
plate for interior decoration. This
plate was finished under a sand blast,
The largest sizsd glass that can be
rolled on this machine is 1910, aud
it completely Tevolutionizss the old
methodIof casting plato glass for grind.
ing Tho table moves continuously
under the roll the first time and is
then reversed to the opposite side and
re-rolled. thus making both sides of
the glass Of equal density. This i'm
proved method obviates the necessity
Of much grinding.
the Bonita Plate. Glass company,
which has been organized in this city,
are contemplating the erection Of their
plant at Moosic, where most desir =
able location ia situated. The test yes
terday was witnessed by large mum
Der Of Scranton people who are inter =
ested in this machine, and many glass
manufacturers from this country and
Europe Mr Bonta's machine is pat
ented in England. France, D Austria,
Germany Hungary and Belgium. An
advautage.s that it will reduce the cost
OF producing this valuable article OF
commerce from 80 to so per cent.
FIRST CHANGE FOR YEARS.
A plate cast by this machine yes!er-
day was made by J. P. Warrick and
assistants from the Pennsylvania Plate
Glass company, OF Irwin. 1t is a beau
tiful work Of art and was designed by
t. A. Kretschman. a sulptor of consid-
erable note. of Philadelphia The fig
ures Lincoln and the cabinet, on the
plate can easily be recognized by any
one. lC measures ten feet in length and
eight feet in width aud is surrounded
with handsomely embossed border.
thus making u most desirable deeora-
tion for interior work,
The plato glass industry has been
without any methodical improvement
for the past 100 years, and Mr. Bonita
is the first to improve it within that
time. IL should be undsrstoo that the
machine will make either plate or en-
bosssd work by substituting the matri1
for smooth plate.
In connection With the glass rolling
machine. Mr.. Bonita has invented a
grinding table and an annsaling oven.
both of which show great advantages
over the present methods in that line.
After the glass has been rolled and an.
nelled, it is placed on the grinding
tables. This refers only to the plain
work. as the embossed glass requires no
grinding on account of sand blast
flush The plate which the, glass il
placed upon is set in motion and re-
wolves horizontally. The glass is ground
to smooth surface and is then re-
versed, which would under the old pro
cess require five hours time and the
combined efforts of fifteen men, with
more or less risk of breakage Mr.
Bonta's method oyercomes this by plac
ing the glass between two tables whi cf
LOtdt0 OIl tuo oduS pLluOiplo 10 tuOoo vi
the rolling machine.
| NEW ANNEALING OVEN.
Another feature is the placing OF
plaster Of paris which is necessary in
grinding, on the glass instead of on the
bed, as is usual This forms a more
perfect union with the glass. The an.
healing oven or leer as it Is termed by
glass workers, is the oven where the
sheet is placed, after being rolled, tc
cool gradually under high tempsra
turs which is decreased slowly in two
or three days. In this very necessary
article, Mr.. Bonita introduces q system
of ventilation which prevents the flooI
from upheaving. This has the effse
of keeping the plate on perfect level
The ventilated foundation of the ovel
prevents any upheaval of the bottom
by means Of free draught which car
ries off the hot sir. This has been one
of the greatest difficulties to content
with In glass rolling as q greater
amount Of work is the result.