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Jan. 7, 1947.‘
u. BAUMANN
'
2,414,019
CLiP OPENING DEVICE. FOR TENTERING FRAMES
'
Filed July 11, 1945
,
> 2 Sheets-Sheet 2
INVENTQR.
Ulric‘h Baumann
ygywhwéuw
ATTOPNEHS
Patented Jan. 7, 1947
‘2,414,010 *
UNITED sTATEs PATENT oFFic
2,414,010
our OPENING DEVICE FOR TENTERING
FRAMES
Ulrich Baumann, Putnam, Conn.
Application July 11, 1945, Serial No. 604,431
8 Claims. (01. 26-61)
1
2
This invention relates to tentering devices used
in connection with fabric ?nishing machines, and
stood from an‘ illustrative rather than a restric~
more particularly to the means for releasing or
tive standpoint.
closure, and the latter, therefore, is to be under~
opening the gripping clips which form a part
In a preferred embodiment of this invention
of such tentering devices.
it has been found desirable to af?x a pulley to a
The means now commonly employed for open
rotating shaft at one end of the tents-ring device
ing the gripping clips comprises a stationary cam
and provide a- second but smaller pulley spaced at
disk against which the upstanding lever arm of
a convenient and desirable distance from the
each of the clips is rapidly brought into con
?rst pulley, then pass a belt about the said pul
tact to swing same upon its pivot for opening. 10 leys and tension same by means of a spring con
This method of operating the clips has proven
trolled idling roller. ‘
entirely unsatisfactory as the rapid and succes
The pulleys are so placed with respect to each
sive impacts between the lever arms and cam disk
other that one side of the “surrounding belt forms
causes a great deal of noise and injures both the ‘
an outwardly slanting line and acts as a cam
cam disk and lever arms. The damage thus
ming surface for gradually contacting the lever
caused necessitates the frequent repair or re
arms of the on-coming gripping clips to open
placement of such damaged parts.
same and maintain them in open position for a
Furthermore due to the said noise and damage,
pre-determined length of time, or until they
the speed of the ?nishing machine, or the amount
reach a point where the opposite side of the end
of fabric fed through the machine has to be kept 20 less belt slants inwardly towards the tensionl'ng
down to a minimum.
It is an object of the present invention to over
come these undesirable features and disad-'
lever arms is broken and the clips are permitted
to swing into clipping engagement with the fabric
vantages.
to be drawn through the machine for ?nishing;
‘
Another object is the provision of a noiseless
means for gradually contacting the lever arms
to operate or actuate the clip to release or open
position.
roller, where the contact between the belt and
The same arrangement may be used for releas
ing the fabric when ?nished.
In the drawings:
‘
Figure 1 is a plan View mostly diagrammatic
A further object of the invention is to provide
of the clip actuating or operating device shown
tentering means of the nature referred to in 30 applied to one end of one side of a tentering
device.
which the clips which are carried on a travelling
endless chain or belt will be gradually opened
Figure 2 ‘is a sectional view taken on line 2-2
of Figure 1.
without shock and maintained in said open po
sition to a pre-determined point in said travel
Figure 3 is a front view of one form of clip
where they will become disengaged from the
used with the improved tentering device and
Figure 4 is a side view thereof.
opening means and be allowed to assume grip
ping engagement with the fabric being ?nished.
Referring now to the drawings in detail It in
Another object of the invention is to produce
dicates a shaft at one end of one side of a tenter
ing device, there being two spaced apart sides
a device of the character described in which the
maximum simplicity of construction and opera 40 to each tentering device, between which the ma
tion is secured.
terial to be ?nished is clamped. In as much
Other objects and advantages will appear as as both sides of the device are alike and the ends
the nature of the improvements is better under
of each side are identical only one end of one
stood, the invention consisting in the novel ar
side is shown. Secured to said shaft I0 is a
rangement and co-relation of parts herein fully 45 sprocket wheel H which is connected by means
described, and illustrated in the accompanying
of a sprocket chain l2_to another similar sprocket
drawings, wherein similar reference characters
at the opposite end not shown, the said other
are used to describe corresponding parts through
sprocket being driven by or from any suitable
out the ‘several views, and then ?nally pointed
means.
out and speci?cally de?ned and indicated in the 50
The shaft‘ It‘! may have secured thereto-a pulley
appended claims.
it above the sprocket H. The said pulley 13
The disclosure made the basis of exemplifying
may be grooved to receive an A type or V type
the present inventive concept suggests a practical
belt l4. Spaced to the right of the shaft H] as
embodiment thereof, but the invention is not
shown in Figure 1, is a short shaft or stud I5.
to be restricted to the exact details of this dis 55 Rotatably mounted upon the said stud i5 is a
2,414,010
3
pulley l6 which is preferably of smaller diameter
than the pulley l3. The said pulley I6 is simi
larly grooved to the pulley l3 to accommodate
the belt It. An idler or tensioning roller or
pulley I1 is carried at one end of a lever [8a
pivoted at It‘, the opposite end of the lever being
actuated by a coiled spring 19 to draw the belt
i4 tight about the pulleys l3 and It. The upper
links of the sprocket chain l2 may be provided
with extensions or plates 20.
Secured to each of ..
4
position for a further period of time, and means
for de?ecting said belt so that same breaks con
tact with the clamping mechanisms at the end
or said further period of time.
3. In a tentering device including a travelling
endless chain, a clamping mechanism carried by
each chain link, said clamping mechanism com
prising a bracket secured to the chain link, a
clamping surface on the said bracket, a clamp
ing lever pivotally mounted on said bracket, 2.
depending end on said lever normally in clamping
contact with the clamping surface of the bracket,
an upstanding arm at the other end of said lever,
upon which is pivotally mounted a clipping lever
a movable belt one side of which is obliquely dis
24 provided with a lower or clipping portion 25
15 posed in the path of said clamping means so as
and an upstanding arm 26.
to progressively and successively contact the up
It will be seen by referring to Figure 1 of the
standing arms at a predetermined point of its
drawings that the pulleys l3 and I6 are so ar
travel to disengage the clamping end of the lever
ranged that the front or outer portion 21 of the
from the clamping surface on the bracket and
belt l4 between the said pulleys slants outwardly
means for de?ecting the opposite side of the belt
from the pulley it to the pulley l3. The said
out of the path of the clamping mechanisms for
slanting side 2'? forms a moving cam, the move
the purpose speci?ed.
ment being in the same direction as the move
4. In a tentering device including a travelling
ment of the sprocket chain l2 and the clipping
endless chain, a clamping mechanism carried by
devices 24.
It will now readily be seen that as the oncom 25 each chain link, said clamping mechanism com
prising a bracket secured to the chain link, a
ing clips pass the pulley Hi, the arms 26 will
clamping surface on the said bracket, a clamp
gradually and without shock engage the cam
ing lever pivotally mounted on said bracket, a
ming portion 2'! of the belt M which engage
depending end. on said layer normally in clamping
ment will cause the clipping member 24 to swing
contact with the clamping surface of the bracket,
about its pivot 23 and become disengaged from _
an upstanding arm at the other end of said lever,
clamping engagement with the surface 28 of the
a movable belt one side of which is obliquely dis
bracket
The clips will be held in this open
posed in the path of said clamping means so as
position by the belt M which extends beyond the
to progressively and successively contact the up
circumference of the pulley [3; until they reach
standing arms at a pre-determined point of its
a point 29 where the belt M suddenly dips down
travel to disengage the clamping end of the lever
wardly towards the tensioning roller ll, thus per
from the clamping surface on the bracket, and
mitting the clips to swing by gravity into clamp
to maintain the same in said open position for a
ing engagement with the surface 28 or any fabric
further period of time and means for de?ecting
resting thereon.
An identical clipping arrangement may be pro 40 the opposite side of the belt out of the path of
the clamping mechanisms for the purpose speci
vided at the opposite end (not shown) in which
?ed.
position it acts to release the fabric after being
5. In a tentering device including a travelling
?nished.
‘
endless chain, a clamping mechanism carried by
From the foregoing it will be seen that the
each chain link, said Clamping mechanism com
movable arrangement of the present invention
prising a bracket secured to the chain link, a
in no way injures the clamping members and does
clamping surface on the said bracket, a clamping
not itself become injured. Furthermore with
lever pivotally mounted on said bracket, a de
the use of the said movable camming device the
pending end on said lever normally in clamping
speed of the machine may be increased as much
contact with the clamping surface of the bracket,
as 50 per cent. With the old arrangement of a ,
an upstanding arm at the other end 01’ said lever,
?xed caznming disk the maximum amount of
and a movable belt one side of which is obliquely
fabric ?nished was 200 yards per minute, while
disposed in the path of the clamping means form
with the improved movable camming belt 300
ing an outwardly slanting area to progressively
yards per minute is easily ?nished and without
and successively contact the upstanding arms at
injury to any of the machine parts.
a pre-determined point of its travel to disengage
What is claimed is: '
the clamping end of the lever from the clamping
1. In a tentering device including a travelling
surface on the bracket, and to maintain the same
endless chain, a plurality of normally closed
in said open position for a further period of time,
clamping mechanisms carried by said chain, a
at which time contact is broken between the belt
moving belt one side of which is obliquely dis
and upstanding arms to permit the clamping end
posed in the path of said clamping mechanisms so
to close against the clamping surface of the
as to contact the said clamping mechanisms at
bracket by the action of gravity.
a pre-determined point in the travel of same to
6. In a tentering device including a travelling
progressively and successively open said mecha
endless chain, a clamping mechanism carried by
nisms, and means for de?ecting the opposite side
each chain link, said clamping mechanism com
of the belt as and for the purpose speci?ed.
prising a bracket secured to the chain link, a
2. In a tentering device including a travelling
clamping surface on the said bracket, a clamping
endless chain, a plurality of normally closed
lever pivotaliy mounted on said bracket, a de
clamping mechanisms carried by said chain, a
pending end on said lever normally in clamping
moving belt one side of which is obliquely dis
contact with the clamping surface of the bracket,
posed in the path of said clamping mechanisms
an upstanding arm at the other end of said lever,
so as to contact the said clamping mechanisms
and a movable belt, one side of which is obliquely
at predetermined point in the travel of same
disposed in the path of said clamping mecha
to progressively and successively open said mech
nisms and forming an outwardly slanting area
anisms, and to maintain the same in said open .
the said extensions 20 by means of bolts 21 is a
bracket 22 carrying a pivot pin or short shaft 23
5
2,414,010
commencing at a pre-determined point of the
travel of said clamping mechanisms to progres
6
8. In a tentering device, a shaft, a sprocket
wheel secured to said shaft, an endless travelling
chain for rotating said sprocket wheel and shaft,
arms to disengage the clamping ends of the levers
a bracket secured to each chain link, a clamping
from the clamping surfaces on the brackets and 6 surface on the ‘said bracket, a clamping lever
maintain same in open position for a pre-deter
pivotally mounted on said bracket, a depending
mined period.
end on said lever normally in clamping contact
'7. In a tentering device including a travelling
with the clamping surface of the bracket, an
, endless chain, a clamping mechanism carried by
upstanding arm at the other end of said lever, a
each chain link, said clamping mechanism com 10 pulley secured to the shaft, a second rotatable
prising a bracket secured to the chain link, a
pulley spaced inwardly of the ?rst mentioned
clamping surface on the said bracket, a clamp
pulley, a belt encircling said pulley, an outward
ing lever pivotally mounted on said bracket, a de
ly slanting area on the said belt ‘intermediate and
pending end on said lever normally in clamping
at one side of the pulleys, a tensioning device to
contact with the clamping surface of the bracket, 15 form a downwardly slanting area On the belt at
an upstanding arm t the other end of said lever,
the other side of the pulleys, outwardly slanting
a movable belt, one side of which is obliquely
area on the belt being adapted to progressively
disposed in the path of the clamping mechanisms
and successively contact the upstanding arms to
and forming an outwardly slanting area com
disengage the clamping ends of the levers from
mencing at a pre-determined point of the travel 20 the clamping surfaces on the brackets and main
of said clamping mechanisms to progressively and
tain same in open position for a pre-determined
successively contact the upstanding arms to dis
period and the downwardly sloping area of the
engage the clamping ends of the levers from the
belt being adapted to cause a break in the con
clamping surfaces on the brackets and maintain
tact between the belt and upstanding arms to
same in open position for a pre-determined pe 25 permit the clamping ends of the levers to be
riod and means for producing an inwardly slant
closed by gravity against the clamping surfaces
ing area on the said belt for breaking contact
on the brackets.
between the belt and lever arms to permit the
ULRICH BAUMANN.
clamping end to close againstthe clamping sur
face of the bracket by the action of gravity.
30
sively and successively contact the upstanding
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