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Патент USA US2127798

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Aug. 23, 1938.
'
c. WETTENMYER
2,127,793
PAPER POSITIONING APPARATUS FOR TYPEWRITERS
Filed Sept. 16, 1956
2 sheets-sheet 1
-
‘
INVENTOR.
C ARLOS WKTTEHMYER.
'
ATTORNEY.
Aug. 23, 1938‘.
2,127,798
c. WITTENMYER
PAPER POSITIONING APPARATUS FOR TYPEWRITERS
Filed Sept. 16, 1936
2 Sheets-Sheet 2
INVENTOR.
C ARLO‘S WITTENMYER.
ATTORNEY.
2,127,798
Patented Aug. 23, 1938
UNITED STATES PATENT OFFICE
2.121.798
PAPER POSITIONING APPARATUS FOR
TYPEWBITEBS
Carlos Wlttenmyer, Mount Clemens, Mich.
Application September 16, 1936, Serial No. 100,978
3 Claims. (Cl. 197-127)
My invention relates to paper positioning ap» When said rollers are acted upon by said cam
paratus for typewriters and an object of my
improvements is to secure greater speed, ac
curacy, and convenience in placing the sheet of
6 paper to be written upon into the typewriter.
I secure this object in the construction shown
in the accompanying drawings in which:
Figure l is a plan view of the apparatus em
bodying my invention and so much of a type
10 writer as is necessary to show its connection
therewith.
Figure 2 is a section on the line B, 28, Figure 1,
the platen being nearly but not quite returned
to operative position.
15
Figure 3 is an end elevation of the same looking
from below Figure 1, the platen being in operative
position.
Figure 4 is a view similar to Figure 3, the
platen being thrown back.
20
Figure 5 is a similar view the platen being near
the end of its travel toward its operative position.
2 is the typewriter table and 3 the frame of
the machine thereon.
4 is a table secured at the rear of the frame 3
25 with its front edge parallel to and nearly on a
faces the bands II a are raised up.
The above described apparatus is used as fol
lows:
The gages 'la-—'la are set a distance apart on
the bail bar 1 approximately equal to the width
of the sheet of paper that is to be used and the
gages 6-8 are located upon the surface of the
table 4 to correspond to the length of said sheet.
The platen being thrown back as shown in Fig- 10
ure 4, the rollers are upon the cam faces 9a,
and the bar II and bands II a are raised a con
siderable distance above the table 4. The sheet
of paper 8 is now inserted between the gages
‘la-4a. and its rear edge caused to engage the 15
gages 8—-8 as shown most distinctly in Figure 1.
The platen is now drawn downward toward
its operative position which brings the cam faces
So from under the rollers l2-l2 allowing the
springs l3--I3, to swing the arms l0 and clamp 0
the sheets S between the rubber bands Ila and
the surface of the table 4. The platen move—
ment is continued engaging the paper S and
bending it down as shown in Figures 2 and 5,
the clamping bar l-l holding the front edge in
position, until the platen is almost to its opera- 5
level with the axis of the platen 5. The table
4 inclines slightly backward, 40-“, are slots _ tive position as shown-in Figure 5 when the cam
in the table 4 extending parallel and adjacent to 9b engages the rollers l2 and‘ raises the clamping
its side edges. 6-—-G, are stops or gages secured bar slightly from the sheet of paper. The platen
then completes its travel and is in operative 30
30 upon the surface of the table 4 by set screws
_
Boa-6a and adjustable along the slots 411-411. position as shown in Figure 3.
The cam face So is made of sufficient height so
‘I is the bail-bar and ‘lap-1a, are gages adjust
able longitudinally to different positions thereon. that the presser bar ll shall be raised thereby
sumciently to be out of the way when the sheet
8-8 are the swinging arms of the platen car
S is inserted; the cam 9b is of less height as it _
rying
frame
pivoted
at
38-38
to
the
frame
3.
35
is only desired to release the paper when the ‘55
9--9 are arcuate cams secured to the arms 8-—8,
platen comes to its operative position.
extending backward therefrom and having cam
In this way the operator inserts the sheet from
faces 9a, and 91) extending outward from their
peripheral edges. Ill-l0 are swinging arms piv
40 oted at Ilia-Illa. at the opposite edges of the
table 4. II is a presser bar extending between
the free ends of the levers Ill-Ill and across the
surface of the table 4. l3--l3 are torsional
coil springs acting upon the arms Iii-i0, to ac
45 tivate the bar ll toward the surface of the table
4. Ila-Ila. are soft rubber bands around the
presser-bar ll. I2--l2 are friction rollers upon
pintles extending horizontally outward from the
levers Iii-40 and engaging upon the arcuate
5 O edge of the cam 9, so that the cam faces 9a, 9b
shall act upon said rollers to oscillate the arms
l0 and raise the bar ll. When the rollers l2 are
between the cam surfaces 9a and 9b the rubber
bands Ila are pressed against the surfaces of the
55 sheet of paper on the table 4, by the springs I3.
the front into an open space and its position is
accurately determined by the gages ‘la-Ila and
6—-6. It is not necessary to move any part of 40
the machine to insert the paper.
What I claim is: _
1. In combination with a typewriter having a
platen roller in a swinging frame adapted to be
turned upward from, and downward to operative 45
position, a table extending in position adapted to
feed a sheet of paper to said typewriter, and
having a gage stop thereon adapted to locate the
sheet of paper in position to be written on, means
for clamping said sheet of paper in said position, "
and a cam on said swinging frame adapted to
engage said clamping means to open said clamp
ing means at each end of the travel of the
platen.
2. In combination with a typewriter having a 56
2
2,127,798
platen roller in a swinging frame adapted to be
platen roller in a swinging frame adapted to be
turned upward from, and downward to operative
position, a table extending in position adapted
turned upward from, and downward to, opera
tive position, a table extendingin position adapt
to feed a sheet of paper to said typewriter and
having a gage stop thereon adapted to locate
the sheet of paper in position to be written on,
a clamping means yieldingly urged toward said
table, a part secured to turn therewith, said
part having an arcuate edge having its center
ed to feed a sheet of paper to said typewriter and
having a gage stop thereon adapted to locate the
sheet of paper in position to be written on, a
clamping means yieidingly urged toward said
table, a part secured to turn with said frame
10 at the axis of said frame and being provided with
cam surfaces at its ends, said clamping means
engaging upon said arcuate edge to be raised by
about the axis thereof and cams on said part
adapted to engage said clamping means to raise 10
the same from clamping position at each end
of the motion of said frame.
said cam surfaces.
3. In combination with a typewriter having 9.
CARLOS WI'I'I‘ENMYER.
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