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Патент USA US2062745

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Decpl, 1936.
’ ‘
>Filed Jan. >16, 1935
l wr
Patented Dec. 1, 1936
Harry Donald Forse, Anderson, Ind.
Application January 16, 1935, Serial No.` 2,058
3 Claims. (Cl. 38--25)
This invention relates to pressing machines for moving the head to coacting position adja
of the type used in laundry and garment work
and to improvements in control mechanism
The present invention provides in a pressing
machine a pair of cooperating pressing members
cent the bed which is adapted to be locked in
that position against a force tending to move the
head in the reverse direction toward open posi
tion. The mechanism illustrated comprises a 5
link I6 pivotally connected at its upper end I'I
each of which is movable toward and from the to the head lever intermediate the ends of the
other, one of the members being movable to co
latter. The link I6 at its lower end lI8 is piv
acting position adjacent the other by mecha
otally connected to a crank arm I9 pivotally
nism which is locked against movement in the mounted at 20 on the frame. The arrangement 10
reverse direction, following which the second of the parts is such that during the closing
member is moved into pressing engagement with movement of the head the lower end of the
the first, thus permitting the release of the> link I 6 oscillates to a point below the pivot 20
moving means for the first member. The press and to a position in which the link I6 has passed
then remains locked until the pressure is re
beyond the center of pivot 20 so that pressure 15
lieved between the coacting members at which between the pressing members tending to raise
time means is operable to open the press.
the head member I5 will pull against link I9 in
The above described structure is particularly its locked position. The crank arm I9 has an
applicable to a press in which one of the mem
odset portion 2i to which is connected a spring
bers, preferably the bed member, includes an 22 which in turn has its upper end mounted 20
expansible ñuid-tight cover member adapted on a bracket 23 on the frame so that spring
when expanded to move the pressing surface 22 is always effective to cause clockwise rotation
of the bed toward the coacting head. My im
of the crank arm I9 as viewed in Fig. 1 and
proved press provides such a press in which is thus always in position to open the press
the head is moved to coacting position adjacent when the arm I9 is free to move.
the iniiatable bed by mechanism which is locked
Preferably I provide power means for moving
against a force tending to move the head toward the head to its coacting position adjacent the
open position and thereafter the bed is auto
bed and in the present instance I have provided
matically íniiated to cause pressure engagement a cylinder and piston motor 24 comprising a
between the pressing members.
cylinder 25 mounted upon a trunnion 26 and 30
My invention also provides novel mechanism provided with a piston 2l whose piston rod 28 is
for automatically producing movement of the pivotally connected at 29 to the crank arm I9.
pressing surface of the bed when the head is Motive fluid is supplied to motor 24 through a
moved to its coacting position adjacent the bed. combined inlet and exhaust conduit 30 com
Other objects and advantages of my invention municating with cylinder 25 and with valve cas- 35
include a power actuated means for releasing ings 3| and 32. Casing 3i is provided with a
the bed member moving means, suitable ar
normally closed inlet valve Sla having a stem
rangements of control valves and other features 3 Ib adapted to be actuated by manual 3 Ic. Cas
which will become apparent from an inspection ing 3l communicates with a supply of motive
of the drawing and the accompanying specifica
ñuid 33 and also communicates by conduit or 40
passageway 3d with casing 32. In the latter
In the drawing, Fig. 1 is an end elevation, casing is a normally open exhaust Valve 32m
partly in section, showing a pressing machine having a stem 32h which is actuated by a
embodying my invention with the control mech
manual 32e. In the drawing I have shown the
anism shown diagrammatically; while Fig. 2 is press actuating valves mounted in a combined 45
a view of part of the control mechanism of Fig. valve casing but it will be understood that these
may be separate casings as described.
1 showing the same in various operated posi
After the head is moved to its coacting posi
tion adjacent the bed, the latter is moved into
In the illustrated embodiment of my inven
tion, on a frame I0 is mounted a relatively fixed ñnal pressure engagement with the head and this 5o
bed member Il and upon a bracket I2 of the pressure against the head acts to hold link I6
frame is pivotally mounted at I3 a head lever I4 in its locked position against the bias of spring
carrying a head member I5 adapted to coact 22. Certain features of my invention are appli
55 with the pressing bed. Mechanism is provided
cable to that type of press in which the entire 55
bed member is raised into pressure engagement
with the head. However, in the present embodi
ment I have shown a type of bed member in
which the pressing surface is adapted to be
raised slightly by means of an expansible sub
stantially fluid-tight cover member 35 which is
mounted upon the bed casting II by fluid-tight
joints 36 so as to provide a substantially fluid
tight chamber between cover member 35 and the
10 bed I I. The control of motive fluid supply to and
from the cover member is by way of a combined
inlet and exhaust conduit 37 communicating
with valve casing 38 in which is located a nor
mally closed inlet valve 39 and a normally open
15 exhaust valve 4G. For supplying motive fluid
to casing 38 I provide a conduit 4I communicat
ing with the supply 33 through a pressure re
ducing valve 42. It is necessary to reduce the
pressure to the cover member in this type of
20 press because ordinarily the pressure required
in motor 24 is greater than that necessary or
desirable to inflate the cover member 35.
Means is provided for automatically raising
the pressing surface of the bed upon movement
25 of the head into its coacting position. This
means comprises a valve actuator 43 pivotally
mounted at 44 and biased by a spring 45 in posi
tion to exhaust fluid from the cover member 35.
This actuator is connected by a collapsible strut
30 45 with a bellcrank 4'! pivotally mounted at 48
and provided with a follower 49 which is adapt
ed to be engaged by one of the head moving
parts, in the present instance link I6, when the
head reaches coacting position adjacent the bed.
In the present embodiment strut 46 is a toggle
having two links pivotally conneced at the tog
gle knuckle 50 and provided with a spring 5I
which biases the toggle to its straightened posi
tion so that the strut is normally in position to
transmit a thrust.
Power means is provided for reversing the
position of the control valves of the bed moving
means. I_n the present instance this comprises
a small servo motor 52 mounted on the frame
and having a piston 53 whose piston rod 54 is
connected by a link 55 with the toggle knuckle
59. A small vent 56 at the fluid inlet end of
servo motor 52 insures the return of the piston
53 after making a power stroke. The supply of
motive fluid to the servo motor is by way of
conduits 51 and 58 which communicate with
valve casing 59 in which is a normally closed
inlet valve 59a having a stem 59h and an oper
ating manual 590. The supply of fluid to casing
59 is by way of passageway 6|).
With the parts in the full line position of Fig.
1, the operation of the press is as follows:
The operator completes the lay of the work
upon the bed II and more particularly upon the
upper surface oi the cover member 35 or the
superimposed padding thereon if such be pro
vided. The operator then actuates manuals 3Ic
and 32C, the latter closing the exhaust valve and
the former admitting motive ñuid to motor 24
65 which makes a power stroke, thus moving the
parts to the dot-dash position of Fig. 1. As the
head moving parts reach this latter position, link
I6 moves bellcrank 41 in a counterclockwise di
rection to the full line position of Fig. 2. The
70 strut 46 at this time moves actuator 43 in a
counterclockwise direction against the bias of
spring 45 thus closing exhaust valve 40 and
opening inlet valve 39 to admit low pressure
huid beneath the cover member 35 and to ex
V75 pand the pressing surface of the bed in an up
ward direction into final pressure engagement
with the coacting head member. This holds the
link I6 in its beyond-dead-center position. The
operator may then release manuals 3io and 32e
and the press will remain closed. To open the Ul
press, manual 59e is actuated which provides
motive fluid for servo motor 52 causing it to
make a power stroke which colapses strut 46
to the position shown in broken lines in Fig. 2.
This permits actuator 43 to move in a clock
wise direction under the iniluence of spring 45
which returns the valves 39 and 40 to the posi
tion of Fig.` 1, thus lowering the pressing surface
`of the bed, whereupon spring 22 is effective to
move crank arm I9 in a clockwise direction thus
opening the press.
Two presses constructed exactly like the press
described may be easily connected in tandem by
mechanism about to be described. An additional
valve casing 6I is provided having a normally 20
closed inlet valve Sla whose valve stem SIb is
operable by a manual 6Ic. This casing is pro
vided with motive fluid through passageway 62.
Leading from the casing 6I is a conduit 63 which
communicates with a servo motor on the other
press, which I shall designate as press B, this
servo motor being the exact counterpart of mo
tor 52 and connected to similar mechanism.
Conduit 58 of the press shown will be connected
to a tandem valve at press B-which is the exact 30
counterpart of the valve in casing 6I. Itis thus
obvious that by actuation of manual 6Ic the
operator may send motive fluid to press B to
actuate the servo motor 52 of that press so as to
release that press from a remote station at any 35
time desired.
While I have illustrated coacting pressing
members of a type peculiarly adapted to pressing
of men’s shirts, it will be understood that my'in
vention may be utilized with many other types 40
of pressing members.
What I claim is:
1. In a pressing machine, a pair of coacting
pressing members each of which is movable to
ward and from the other, means for moving one 45
of `said members to coacting position adjacent
the other member and for holding it there, said
means including motion transmitting mechanism,
fluid actuated means for moving the other of said
members into ñnal pressure engagement with the -50
coacting member, conduit means communicating
with a ñuid supply and with said fluid actuated
means, inlet and outlet valves in sai-dconduit
means and biased toward fluid exhaust position,
an actuator-for moving said valves to fluid supply
position, means for moving said actuator by move
ment of said mechanism to place said first-named
pressing member in coacting position and in
cluding a collapsible strut, means normally main
taining said strut in extended position, means for
collapsing said strut to move said actuator and
valves to fluid exhaust position, and means for
returning said ñrst-named pressing member to
open position when said ñuid actuated means is
2. In a pressing machine, a frame, a lever piv
otally mounted at one end on the frame and
carrying at its other end a pressing head, a‘co
acting pressing bed mounted on the frame and »
having an expansible substantially ñuid-tight
cover member adapted when expanded to move
the pressing surface of said bed member toward
the coacting head member, means for moving
said head from open position to coacting position 375
adjacent said bed comprising a link pivotally con
nected at its upper end to said lever intermediate
its ends and pivotally connected at its lower end
to a crank arm, said crank arm having a. pivotal
mounting on the frame, the parts being so ar
ranged that when said _head is in coacting posi
tion the lower end of said link lies below said crank
arm pivot and said link has passed beyond said
crank arm pivot, means for moving the parts to
10 the last-named position, means actuated by move
ment of said parts to said last-named position
for expanding said cover member, press-opening
mechanism for returning the head to open posi
tion, said last-named means comprising conduit
15 means communicating with a fluid supply and
with said cover member, valve means in said con
duit means including a normally closed inlet
valve and a normally open exhaust valve, an
actuator for moving said valve means to operated
member, means for' moving said actuator to oper
ate said valves by movement of the press parts to
place said head in coacting position and including
a collapsible strut, said strut being normally eX
tended and means for collapsing said strut to
move said actuator to return said valves to normal
position while said head moves toward open posi
3. In a pressing machine, a pair of coacting
pressing members, power actuating means there 10
for, a control member for sai-d power means hav
ing “on” and “off” positions and normally biased
toward one of said positions, means for moving
said control member into the other of its two
positions, said means including a collapsible strut,
means normally maintaining said strut in ex
tended position, and means for collapsing said
strut, whereby sai-d control member may return
to said one position under influence of its bias.
position with said inlet valve open and said eX
haust valve closed for supply of fluid to said cover
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