NEW OR IMPROVED APPARATUS FOR GRINDING OR SETTING UP THE DOCTOR BLADES FOR ROLLERS IN CALICO PRINTING MACHINES
Year: 1879

page_text: LETTERS PATENT to Carl Kesseler, of 63, Mohrenstrasse, Berlin, W., in the
"
Empire of Germany, Civil Engineer and Patent Solicitor, for the Invention of
NEW OR IMPROVED APPARATUS FOR GRINDING OR SETTING UP THE DOCTOR
BLADES FOR ROLLERS IN CALICO PRINTING MACHINES." A communication
from Louis Seiffert, of M. Gladbach, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Carl Kesseler at the Office of
the Commissioners of Patents on the 29th May 1879.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. NEW OR IMPROVED APPARATUS FOR
GRINDING OR SETTING UP THE DOCTOR BLADES FOR ROLLERS IN CALICO PRINTING
MACHINES." (A communication from Louis Seiffert, of M. Gladbach, in the Empire
of Germany.)
Heretofore the steel or composition doctor blades used for rollers in calico printing
machines for scraping the color off the printing rollers have been ground or set up
by hand by means of file and whetstone.
The object of this Invention is to accomplish the said work with greater
exactitude, convenience, and rapidity by means of a machine. For this purpose a
machine or apparatus is constructed having two quickly revolving grindstones or
wheels of emery composition or other suitable material.
These grinding wheels act on the doctor blade, one of them grinding the edge
in a straight line and the other sharpening the blade; the doctor blade remains
fastened in its sheer; the grinding wheels are conveyed past the doctor blade by
means of two supporting slides.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Carl Kesseler in the Great Seal Patent Office on the 29th November
1879.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. "A NEW OR IMPROVED APPARATUS FOR
GRINDING OR SETTING UP THE DOCTOR BLADES FOR ROLLERS IN CALICO PRINTING
MACHINES." A communication from Louis Seiffert, of M. Gladbach, in the Empire
of Germany.
The primary object of this Invention is, by means of a machine or apparatus, to
grind or set up the steel or composition doctor blades used in calico printing 1
machines for scraping the printing colour off the prepared copper printing roller.
The apparatus inay however also be used more or less for grinding or setting up
other straight edges, such as for the lower shear of shearing machines and similar
objects.
Heretofore the doctor blades used for rollers in calico printing machines have 1
been ground or set up by hand by means of file and whetstone. By means of the
machine or apparatus now to be described the said work is accomplished with
greater convenience and rapidity, and with absolute exactitude.
The machine has two quickly revolving grindstones or wheels of emery compo-
sition or other suitable material. These grinding wheels act on the doctor blade, 2
one of them grinding the edge in a straight line and the other sharpening the
blade; the doctor blade remains fastened in the sheer; the grinding wheels are
conveyed past the doctor blade by means of two supporting slides.
Figure 1 of the accompanying Drawing is a side elevation of the working side
of such a machine; Figure 2, a plan; Figure 3, a section on line A, B; and 2
Figure 4, an enlarged detail view for showing the mode in which the grindstones
act on the blade.
On the bedplate resting on the framing a, a, of the machine there are two slides
or slide rests b, b, on to which the blade holder c with blade 7 is bolted.
Both slides b, b, are firmly connected by a tooth-rack d, into which gears a 3
pinione which is fixed on the spindle f and is worked by a crank handle k, hereby
the two slides with their doctor blade are moved there and back, so that the doctor
blade goes gradually past the two grind stones s, 8', these latter are emery wheels,
which are made fast on their respective spindles w, w¹, by nuts, and are caused to
revolve by the strap pulleys P, P².
While the doctor blade is carried past the revolving grindstones the grindstone s
sharpens the edge of the blade, and the grindstone s' grinds it to a perfectly true
or straight line. To prevent a bending or vibrating of the blade it is supported
during the grinding by the table t, which can be vertically adjusted by the screw v.
The bearings, l, of the grindstone spindles are also adjustable laterally and
vertically.
The slides on which the blade holder rests may also be regulated by screws h, h,
whereby the blade at all times can be put into the right position relatively to the
grindstones. o, o¹, is the striking gear for shifting the strap from the fast to the
loose pulley, and vice versa.
And having thus described and ascertained the nature of this Invention I declare
that I claim,
First. The combination of parts forming the doctor blade setting up apparatus,
substantially as described and shown.

page_text: Second. The combination of the blade holder c with slides b, b, and tooth rack d
for moving the blade backwards and forwards against the grindstones 8 and 8²,
substantially as described and shown.
In witness whereof, I, the said Carl Kesseler, have hereunto set my hand and
seal, this Twenty sixth day of November, in the year of our Lord One
thousand eight hundred and seventy nine.