US886992A - Stenciling-machine. - Google Patents

Description

'PATENTED MAY 5. 1908.

E. F., KUNATH. STENCILING MACHINE. APPLIGATION FILED JAN. 10, 1906.

5100110) 44! 9m 1;: J my UNITED STATES PATENT OFFICE.

EDWARD F. KUNATH, OF JERSEY CITY, NEW JERSEY, ASSIGNOH T0 UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

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Specification of Letters Patent.

Tatented May 6,1908.

Application filcd'lanum'y 10, 1986. Serial No. 295,448.

To all whom it may concern:

Be it known that I, EDWARD F. KUNATH, a citizen of the United States, residing in Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Im rovements in Stenciling-Machines, of whic the following is a specification.

This invention relates to stenciling 'ma. chines, in which usually the stencil or perforated'wax sheet is laid upon a hollow stencil or drum, which consists of erforated sheet metal, the ink being appliet to the interior of the drum, and passing through the perforations to the stencil sheet. A blanket for absorbin the ink is usually laid upon the cylinder fimneath the stencil sheet. Blank sheets to be stenciled are passed between said cylinder and a pressure roll. It often happens, especially where the blanksheets are thin, that they adhere to the stencil sheet, and hence it becomes necessary to provide means for stripping the stenciled paper from the cylinder.

The devices heretofore employed for strilpping the stenciled sheets are objectionab e, principally because they contact with the stand and make lines or impressions thereon through which the ink passes on to the stenciled sheets.

The object of my invention is to provide simple, certain and inexpensive means for stripping the sheets as they emerge from the bite of the ressure roll and cylinder and without liabllit of marring the stencil or smearing the in r.

In ca -ng out my invention, I connect to the stencil cylinder a bellows arrangement, a pi e passing from the bellows along the stenci cy inder and having jets to direct the'air between the cylinder and the leading edge of the stenciled sheet, thus strip ing the leadin portion'of the stenciled s set from the cy inder; the weight of the sheet itself sufiic-- ing to strip the remainder of the sheet, as it passes through the machine.

In the accompanying drawings, Figure 1 is a rear view of so much of a stenciling machine, as is necessary for illustrating my im provements, the stencil cylinder being s own in dotted lines, and the bellows in section. Fig. 2 is an end view, the bellows being shown in section.

U on a base 1 are erected standards 2, 3, in w 'ch is journaled the shaft 4 of a hollow stencil cylinder 5. The cylinder usually is provided throughout with perforations 6 for the passage of the ink, and s usually covered with an ink blanket and stencil sheet, not shown. The cylinder is rotated by a handle or crank 7, and the blank-sheets 8 are fed bee.

I base 1. Within the baseis formed an inlet 12 covered by a flexible-flap or valve 13 within the bellows. From the latter leads upwardly a pipe 14', which at its upper end is bent horizontally, and extends along the rear under side of the cylinder at 15, this portion having a series of jets 16 in position to direct the blast of air between the under surface of the cylinder and the leading edge 8 of the sheet,this edge never adhering to the cylinder, because an uninked margin is usually left at the top of the sheet.

The machine is shown in normal position at Fig. 2, the top of the bellows 10 being con nected by a pitman 17 to a short crank 18, provided upon the cylinder shaft, said crank emg normally in about horizontal position, although it may be otherwise connected. When the par-ts are in the Fig. 2 position, the leading edge of the blank sheet is introduced between the pressure roll, and the cylinder is then turned, as indicated by the arrow durdescend, thus closing the bellows and forcing the air to esca e to the jets 16 and to blow between the cy inder and the leading ed e 8 of the sheet. This issuflicient to strip 0% the leading portion of the sheet, and the same passes below the pipe 15, and is received by a table 19; the weight of the sheet being sufficient to strip off the remaining portions thereof from the cylinder. The pi e 15 may be bent down as at 20, and attac ed to the base to form a sup ort. v

Variations may e resorted to within the scope of my invention, and portions of my im rovements may be usedwithout others.

aving thus described my invention, I claim 1. In a stenciling machine, the combination with a stencil cylinder. of a handle contween the cylinder and a soft pressure roll 9',

ing which time the crank 18 and pitman 17 nected thereto, a detent for holding the cylinder in position to receive a sheet to be der, and means for directingsuch blastbetween the cylinder and the leading edge -of thesheet at a point near said pressure roller.

2. In a stenciling machine, the combination with a stencil cylinder havin a shaft, of

a crank or eccentric upon said s aft, a pitman connected to said crank or eccentric, a bellows connected to said pitman, so as to be caused to ei'ect a blast of air durin the early portion 0 the rotation of said cylinder from normal position, a tube connected to said bellows and extendin along said cylinder and having a series 0 jets to direct the blast of air to the cylinder and the leading edge ofthe stenciled sheet, and a roller to press the sheets against the cylinder.

' '3. In a stencilin machine, the combination with a stencil cy inder having a horizontal shaft, of a pressure roller bearing up against the bottom of the cylinder, a detent or a stop for determinin the normal position of the cylinder, a be ows or blower connected to said shaftso as to be caused to expel a blast of air during the early portion of the rotation of saidcylinder from normal position, and a tube connected to said bellows and extendfor directing the blast from the bellows between the cylinder and the leadingv edge of the stenciled sheet, so as to strip the latter 4 from the cylinder; said bellows being so connected to the cylinderwthat the blast is produced once in each revolution as the sten ciled sheet emerges from the bite of the cylinder and roll.

EDWARD F. KUNATH.

Witnessesi K. FRANKFORT, B. C. STIGKNEY.

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