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Патент USA US2129230

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Sept. 6, 1938.
J. H. o’NEu.
2,129,230
DOUBLE SHEET EJECTOR
Filed Oct. 2, 1936
2 Sheets-Sheet 1
gmc/Mio@
. jb ¿fd
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Sept. 6, 1938.
J, H_ 0’NE||_
2,129,230 l
DOUBLE SHEET EJECTOR
Filed Oc'b. 2, 1936
2 Sheets-Sheet 2
lLizenzen
Patented Sept. 6, 1938
?UNITED- STATES2.129,2@PATENT
oi-‘Fice '
DOUBLE SHEET EJEC'IOR
James Il. O’Neil, Syracuse, N. Y., assignor to
Uontlnental Can Company, Inc.. New York,
N. Y., a corporation of New
York
.
Application October .2, 1936, Serial No. 103,796
3' Claims.
-(Cl. 209-88)
The invention relates to new and useful im
provements in a double sheetl ejectorprimarily
For the purpose of illustration, the double sheet
detector and ejector are shown in connection with
a machine for cutting the sheet into strips. This
machine comprises "a table Ill, over which the
sheets Il are automatically fed one by one to the
adapted for use in connection with automatic
sheet feeding mechanism, as for example, inthe
5 feeding of sheet metal to a slitter.V The sheets are
feed rolls I2. This machine does not per se con
usually stacked in a' pile and the topmost sheet
is lifted from vthe pile by suction cups and then
fed to the operating mechanism. Sometimes two
sheets adhere and will be lifted as one sheet and
fed into the machine. v The two adhering sheets
are referred to as a double sheet or an abnormal
sheet.
~
An object of the present invention is to provide
a simple ejecting mechanism of few parts which
is rendered operative by an abnormal sheet only
15
from the feeding mech- .
for diverting the-same
anism.
.
.
A further object of the invention is to provide
a detector which will cause the ejector mech
anism to be set in operation by a double sheet
passing between the feed rolls, but not by _a
single sheet with a small irregularity or bump in
stitute a part of the present invention `and need
not be described in detail.
.
‘-
.
Whatever mechanism is used for feeding the
sheets, it sometimes happens that two sheets will
adhere together and thus be fed between the rolls
I2. When this occurs, it is quite important that
they be ejected before they reach the cutting rolls
I3.' For this purpose, therefore, the detector-> Il
is supported above the table I0 just ahead °of the
feed rolls I2, as shown in Fig. l.
The detector Il comprises a disk I5, which
may be rubbenmetal, wood or other suitable ma
terial. This disk is mounted to rotate on ball
bearings |59" about a stud I8, which is secured 20
by nuts I6a to a suitable supporting panel I'I,
with the shoulder I6b engaging the front face of
the panel. The panel and stud are so supported
its surface, or one with a bent edge.
r
A still further object of the invention is to
25 provide means for releasing the whole detector
that the disk I5 is disposed at one side of the
path of travel of a normal sheet and out of 25
contact therewith, but sufficiently close to the
unit, in case a sheet is so irregular that it becomes , ypath so that an abnormal sheet, that is, two
sheets adhering together and constituting a double
The invention, in its present form, involves a sheet, will frictionally contact with and rotate the
mercury switch attached to a detector disk which
30
,
is close enough to the feed table to be engaged disk.
' A mercury switch I8 is supported in a clip I9
30
and rotated by a double sheet. The mercury carried by the disk I5. The clip is provided with
switch is normally open but is adapted to be Slots` 20 for receiving screws 2l. whereby the
closed by the turning of the disk through a pre
switch is adjustably secured to the disk I5. The
'
'
jammed.
.
determined angle. The wldth'of the angle, how
35
ever, is such that a minor irregularity will not
rotate the detector disk far enough to close the
switch.
'
-
,
-
The-construction of the invention and the ad
vantages thereof will be more particularly ex
40
plained in connection with the`- accompanying
drawings, in which*
Figure l is a side elevation oi the detector unit,
switch is protected by a housing 22, of which 35
the panel Il constitutes a part and which is pro
vided with a hole 23 for receiving the wiring.
The housing is open on‘its under side and is
placed high enough to permit the sheets to pass
therebeneath.
1'- l
40
It will be seen from Fig. 3 that when a single
sheet is fed beneath the detector, the Switch will
not be disturbed, but when two sheets are fedl
also showing diagrammatically parts of the Áma
together, the disk will be engaged and rotated,
chine with which .it may be used;
l
as indicated in Fig. 5, and the switch will be 45
Fig. 2 is an isometric sectional- view, enlarged, closed. A pin 24 anchored in the disk I5 pro
45
taken along the axis of the detector unit, with jects into the arcuate slot 25 in the panel I1.
the switch) omitted in order to show other details; The ends oi the slot 25 serve as stops for lim
Fig. 3 is an enlarged end view of the disk car
iting the rotation of the disk in both directions.
rying the'mercury switch, when in normal posi
When a double sheet passes beyond the detector
disk. the latter is returned to >its initial position,
50
Fig. 4 is a detail viewof the disk and spring as shown in Fig. 3, by avcoiled spring 26, shown
viewed from the opposite side;
`
in detail in Fig. 4, one end of this spring being
Fig. 5 illustrates thé position of the disk and anchored _in the disk I5 and the other end an
switch as actuated by a double sheet;
chored in the panel I1.
l
Figures 6 and ’I illustrate the behavior of the
The panel I1 is yieldably supported by a rigid
55
switch yunder the influence of a buckled or ir
arm 21. For this purpose, the arm is provided at
regular sheet, and
its end with a hub 28, which receives a shouldered
Fig. 8 is a side elevation of the sheet eje‘ctor stud 29. The small end 3010i this stud is threaded
which is set in operation bythe closing of the into ‘the panel l1. 'A torsion spring 3i is wound
tion;
‘il switch.
,
»
,l
'
' ‘,
'
2
2,129,230
about the stud between the panel and the hub
of machine to which sheets may be fed, regard
less` of the `operation to be performed on the
28. A tongue 32 at one end of the spring engages
a slot 33 inthe panel, while a tongue 34 at the
other end of the spring engages a selected one of
sheets.
the slots 35 in the end of the hub. When a sheet
fed beneath the detector is so badly crumpled
that it jams against the detector housing, the
scribed. is merely illustrative, and that the in
ter, so that the whole unit will clear.
The ejector, as 'shown in Figures 1 and 8, isx
supported on'a framework 36 above the table I0
and behind ythe detector I4. It comprises rolls
31 .driven by suitable mechanism 88 operatively
connected with the machine.~ A feed chute 39
15 leading to the rolls 31 has an apron 40 carried
by a rock shaft 4I -which is mounted on the
framework and normally held above the path of
the sheets, as shown in full lines in Fig. 8. An
arm 42 is secured to the rock shaft 4I and is
20 connected by a link 43 to the core 44 of a sole
noid 45, which is connected by wires 46 to the
switch I9 and to a suitable source of electric
current.
.
When the switch I9 is closed, the solenoid is
energized, rocking the shaft 4I and moving the
. apron 40 tothe dotted line position shown in Fig.
8, with its lower edge extending into a slot t1 in
the table il), so that the double sheet. which
causes the switch to close, is ejected and passes
30 through the chute 39, between _the rolls 37 and
onto a raised table 48 behind the same.
It will be understood that, in the normal oper
ation of the machine, the sheets are automati
cally fed one by one between the rolls it and to
35
the cutter, the detector and ejector remaining
idle.
When two sheets stick together and are
thus fed b‘etween the rolls It, the upper sheet
engages> the rubber disk i5 and rotates it until
the pin 24 engages the upper end of the slot 2b.'
40 In this position, the switch I8 is closed, the sole
noid 45 is energized, the apron lil)l is lowered
until-its lower edge extends into the slot 41 in
the .table IIJ, and the double sheetis carried
through the rolls 31 to the table 48, so that it is
not fed to the slitter or other machine which
the detector is designed to protect.
‘
If a sheet is slightly buckled, as shown at 49
in Fig. 6, or if it has a heavy burr on -the leading
edge, high enough to engage the disk I5 as- shown
50 in Fig. 7 at 50, the disk will be rotated to some
‘
vention also includes all such modifications as
may be made within the scope of the claims here
unto appended.
~ latter will be rotated about the hub 28 as a. cen
10
-
It is also to be understood that the construc
tion of the invention, as herein shown and de
Having thus described the' invention, what I 10
claim as new and desire to secure by Letters Pat
ent, is-
y
` 1. The combination
v
'
'
with sheet feeding mech
anism, of a rigid support provided wtih a hub
above the path of the sheets, a stud rotatably 15
mounted in said hub, a housing secured to said
stud, a torsion spring connecting the hub to the
stud and normally holding the housing in a pre
determined position, a disk rotatably supported
within the housing with a segment thereof pro 20
jecting from the housing toward the path of the
sheets and spaced therefrom so as to contact only
with abnormally thick or doubleV sheets,- a nor
mally open switch carried by said disk and
adapted to be closed by a predetermined rotation 25
thereof, and means actuated upo'n the closing of
said switch to eject the abnormal sheet from its
normal course of travel, said housing being ro
tatable in opposition to said spring to allow an err-i
cessively abnormal sheet to clear.
_
2. The combination with sheet feeding mech-m 30
anism, of a rigid support provided with a hub
above the path of the sheets, a stud rotatably
mounted in said hub, a housing secured to said
stud, a torsion spring connecting the hub to the
stud and normally holding the housing in a pre
35
determined position, a disk rotatably supported
within the housing with a segment thereof pro
jecting from the housing toward the path of the
sheets and spaced therefrom so as to contact
only with abnormally thick or double sheets, stops 40
limitnlg the rotation of the disk in either direc
tion, a spring normally holding the disk in one
, extreme position and returning it to such posi
tion when it is’released by the sheet, a normally
open switch carried >by said disk and adapted to 45
be closed by a predetermined rotation thereof,
and means actuated upon the closing of said
switch to eject the abnormal sheet from its nor
extent, but not far enough to close the switch, mal course of travel, said housing being rotat
since these slight imperfections will not seriously able in opposition to its spring to allow an ex 50
interfere with the normal operation- of" the ma- , cessively abnormal sheet to clear.
chine.
.
`
, 3. 'I'he combination with sheet feeding mecha
,
nism,-of a rigid support provided with a support
55 ` If a sheet is so badly crumpled that it jams
ing member disposed above the path of travel
againstthe housing 22, the entire detector unit
of the sheets, a housing pivotally mounted on said 55
support, a spring for normally holding 'said hous
ing in a predetermined position _.relative to' the
support, a disk rotatably supportedV Within the
housing with a segment thereof projecting from
the housing toward the path- of the sheets and 60
will be rotated about the axis of the hub 28 until
the sheet clears the housing. This also will close
the switch and the sheet Will be ejected.
60
Whenever the disk I5 is displaced from its
normal position by a double sheet or lîy an im
perfect sheet, it is immediately returned by', the
spring 26, as soon as the sheet which caused the
65
_
spaced therefrom so as to contact only with ab'
normally thick or double sheets, the axis of said
displacement has passed beyond the detector.
Likewise, whenever the whole unit is displaced
disk being disposed beneath the pivotal support
for the housing, stops for limiting the rotation of
with respect to the hub 28, it is returned by the ythe
disk in either direction, a spring normally 65
spring 3 I.
holding the disk in one extreme position and re
From the foregoing description, it will be
turning the same thereto when released by the
seen that the invention permits the use of auto
matic sheet feeding mechanism and protects the
machinecompletely against possible injury or
interference' with its operation by imperfections
in the sheets or inthe _feeding thereof. It may,
of course, be used in connection with any ,type
,
sheet, a normally open switch carried by said
disk and adapted to be closed by a predetermined
rotation of the disk, and means actuated upon 70
the closing of said switch to eject the abnormal
shape from its normal course of travel.
JAMES H. O’NEIL.
`
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