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Патент USA US3051087

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Aug. 28, 1962
P. w. FAWCETT
3,051,077
ESCAPEMENT FOR AUTOMATIC WIRE-TYING MACHINE
Original Filed Nov. 20, 1956
3 Sheets-Sheet 1
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PAUL W. FAWCETT
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Aug. 28, 1962
P. w. FAWCETT
3,051,077
ESCAPEMENT FOR AUTOMATIC WIRE-‘DYING MACHINE
Original Filed Nov. 20, 1956
3 Sheets-Sheet 2
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PAUL W FA WCE'TT
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Aug. 28, 1962
P. w. FAWCETT
3,051,077
ESQAPEMENT FOR AUTOMATIC WIRE-TYING MACHINE
Original Filed Nov. 20, 1956
3 Sheets-Sheet 5
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United ‘States PatentO
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generally at 11 for feeding in wire 12, which may be
round or ?at, from an external supply coil and pulling
it back; the escapment of the invention, designated gen
3,051,077
ESCAPEMENT FOR AUTOMATIC WIRE
TYING MACHINE
Paul W. Fawcett, Western Springs, 11]., assignor to United
States Steel Corporation, a corporation of New Jersey
Original application Nov. 20, 1956, Ser. No. 623,458, new
Patent No. 2,912,099, dated Nov. 10, 1959. Divided
and this application Aug. 11, 1959, Ser. No. 832,961
4 Claims. (Cl. 100—26)
This application, which is a division of my copending
"M
3,®5l,077
Patented Aug. 28, 1982
erally by reference numeral 13, for holding the surplus
wire, when it is pulled back by the wire feeding means;
a tie-tensioning means 14; a knotter mechanism 15; and
a guide track 16. A left-hand guide chute 17 connects
the tensioning means 14 to the knotter mechanism, and
a right-hand guide chute 18 connects the knotter mecha
10 nism to the guide track 16. The usual table or sup
porting plate overlies the knotter mechanism to hold
bundles or packages while the tie is being applied and
secured therearound. As already pointed out, the novel
plying and securing wire ties to bundles, boxes, bales or
features disclosed in detail and claimed herein are those
other packages, and especially to machines for auto 15 forming parts of the escapement 13.
matically performing the several operations involved, in
Wire 12, on entering the machine, passes ?rst through
rapid sequence.
a Wire-end detector indicated generally at 19‘ (see FIG
In the operation of the general type of wire-tying
URES 1, 2, and 4). The wire is threaded through an
machine shown in Patent No. 2,912,099, the supply
entry guide 23 in the wire-end detector 19. When the
20
wire, from which a tie is to be made, is fed around a
trailing end of a coil of supply wire passes through the
guide track in the form of a loop, with the ends of the
entry guide, or in case of a break in the wire, a switch
tie overlapped in the slot of a knotter pinion. Then,
(not shown) is operated to stop the wire-driving means.
when a tie is to be applied to a package, the package is
The length of wire remaining in the machine may then
placed within the track, the wire is pulled back to draw
be easily pulled out by hand.
the tie tight around the package and is then ?nally ten 25
From the wire-end detector 19, the wire passes to a
sioned. The overlapped ends of the tie are then twisted
slidable guide-roll housing 25 and around a sheave 26
together by the knotter pinion and the tie is out free
enclosed therein (see FIGURES l, 2 and 4). The hous
from the supply wire and ejected from the pinion.
ing comprises spaced plates 27 and 28 with suitable
More particularly, the improvements claimed herein
spacer means therebetween (see FIGURE 5). Sheave
relate to an escapement for receiving and holding the 30 25 is journaled in a slidable bar 30‘ reciprocable in a
surplus length of wire initially fed into the guide track
slot 31 milled in the inner face of the plate 10. Housing
which exceeds the length actually needed to encircle
25 is mounted on bar 30, reciprocable manually there
the bundle when the tie is drawn tight around it. Other
with, by means of a knob 32 on the shaft of sheave 26
parts of the machine, such as the means for feeding the
which is exposed on the outer face of plate 27, from the
wire around the guide track and subsequently pulling it
working position shown in FIGURES 1 and 2 to the
therefrom in ‘initial engagement with a package, the
threading position shown in FIGURE 4, to facilitate
means for ?nally tensioning the tie, the knotter-pinion
threading of the wire 12.
actuating mechanism and the guide track may be of any
Housing 25 is releasably held in the innermost or work
suitable construction. These elements are not claimed
ing position by a latch mechanism shown in FIGURE 5.
40
herein and with the exception of the wire feeding means
This mechanism comprises a thumb lever 35 pivoted at
are shown only diagrammatically. The Wire feeding
36 on plate 27, biased by a spring 35a to the illustrated
means, which is fully described in Patent No. 2,912,099,
position. Lever 35 has a fork-and-pin connection 37 to a
will be shown and described herein only to the extent
locking pin 38 reciprocable in a bushing 39 extending
necessary for a clear understanding of the escapment of
45 through plates 27 and 28 and engaging the end of an
the present invention.
adjustable stop plate 40 slidable in a slot in plate 10.
A complete understanding of the invention may be
Pin 38 is tapered at its inner end and will therefore be
obtained from the following detailed description and
forced outwardly against the pressure of spring 35a,
explanation which refer to the accompanying drawings
by an abnormal force on the housing 25 tending to re
illustrating the present preferred embodiment. In the
tract it from the working position. Sheathing plates 41,
application Serial No. 623,458, ?led November 20, 1956,
now Patent No. 2,912,099, relates to machines for ap
drawings:
FIGURE 1 is a side elevation with portions broken
away;
FIGURE 2 is a portion of FIGURE 1 to an enlarged
scale;
50
41a and a ‘block 4112 (see FIGURES 1, 2 and 4) secured
to plate 10 with spaces therebetween cooperate with the
right-hand edge of plate 27 which is of S-shape structure,
to ‘de?ne a passage con?ning the wire when it is pulled
back to tighten around the package.
along the plane 55 The wire-driving means includes a sheave 44 mounted
on a shaft 44a journaled in a gear housing (not shown)
2 showing parts
secured to plate 10. The axis of sheave 26 is vertically
aligned with that of sheave 44- when housing 25 is in
along the plane
60 working position. In such position, the edge of plate
27 overlaps a portion of the periphery of sheave 44 as
along the plane
shown in FIGURES l and 2. Shaft 44a is directly con
nected to a reversible hydraulic motor (not shown).
FIGURE 7 is a portion of FIGURE 6 with a part in
A driven pinch roll 51 is mounted above sheave 44 and
alternate position; and
is adapted to cooperate therewith. Sheave 44 and pinch
65
FIGURE 8 is a view similar to FIGURE 3 showing
roll 51 normally exert su?icient friction on wire 12 in
parts in alternate position.
FIGURE 3 is a partial section taken
of line III——III of FIGURE 1;
FIGURE 4 is a portion of FIGURE
in an alternate position;
FIGURE 5 is a partial section taken
of line V-—V of FIGURE 2;
FIGURE 6 is a partial section taken
of line VI-VI of FIGURE 1;
Referring now in detail to the drawings and, for the
present to FIGURES l and 2, the principal working
serted therebetween to feed it forward or retract it on
operation of the reversible hydraulic motor in one direc
tion or the other. A guide tube directs the advancing
parts of the machine there shown are mounted on a
wire driven by the wire feeding means through the ten
plate 10 disposed vertically and secured to a supporting 70 sioning
means 14 whence it is guided into the left-hand
frame of structural members (not shown) at one side
guide chute 17.
thereof. These parts include reversible means indicated
With the exception of the escapement of the invention,
3,051,077
3
4
.
the structure thus far described is not claimed as part of
the present invention but is included herein to facilitate
understanding of the escapement of the invention.
The escapernent 13 functions to receive and temporarily
store the loop of surplus wire formed When sheave 44 is
driven to pull the wire out of the guide track 16. Sheath
wire around a guide track in the form of a loop with the
ends of the loop overlapped in a knotter pinion, draw the
wire tight around a package disposed in the guide track
by pulling back on the wire and retracting it from the
guide track, twist the overlapped ends of the loop together
by rotating the knotter pinion, and then cut the twisted
ing plates 41 and 41a are secured to plate ‘10 with spacer
strips ‘72 therebetween, de?ning a shallow pocket 73 of a
knot free from the supply wire, the improvement there
with of a receptacle for receiving said Wire loop when it
is retracted from the guide track to draw the wire tight
width equal to the axial width of sheave 26, adapted to
receive the wire loop indicated at 12a. The surplus wire 10 around the package, said receptacle comprising a generally
vertical supporting plate, a pair of horizontally elongated
is ejected from between sheaves 26 and 44 into the pocket
con?ning plates disposed side-by-side in spaced parallel
73 ‘along the upper edge thereof. A strip 74 of spring
relation to said plate by means adjacent their edges remote
steel overlies plate 41 and is slotted upwardly from its
from each other, the adjacent edges of said con?ning plates
lower edge to form a plurality of spring ?ngers 75. Fingers
being spaced apart de?ning a slot therebetween, and a
75 have their lower ends bent to form tongues 76 entering
series of yieldable ?ngers mounted on one of said con?ning
the space between the adjacent edges of plates 41 and
plates and extending through said slot toward said sup
41a. The sides of the tongues 76 are beveled as at 78‘
porting plate, said ?ngers being of such a con?guration
whereby the tongues are successively displaced as the loop
that they may be successively displaced by said loop
12a lengthens (see FIGURE 8). The tongues prevent
pushed into the space between the supporting plate and
the upper run of the horizontally extending loop from
sagging excessively yet permit the surplus to be freely
con?ning plates and repositioned thereafter to support the
upper run of said loop.
pulled out of the pocket on the next tie-feeding operation
2. Apparatus as de?ned by claim 1 wherein said ?ngers
before additional wire is drawn from the supply coil.
are formed from a strip of spring metal overlying one of
It will be apparent from the foregoing that the invention
provides an escapement for a wire-tying machine having 25 said con?ning plates and the edge of said strip of metal
important advantages. The pocket of escapement 13 for
nearest the adjacent edges of said con?ning plates having
spaced slots formed therein.
receiving the surplus length of wire is always open and
3. Apparatus as de?ned by claim 1 wherein said ?ngers
the loop extends itself readily thereinto on reversal of the
are each formed of flat spring metal with their ends bent
driving sheave. The upper run of the loop is always held
suspended by the spring ?ngers 75 so as to prevent tangling 30 over and entering said slot.
4. Apparatus as de?ned by claim 3 in which the sides
or kinking when the loop is pulled out to form the next tie.
of said bent-over ends are beveled.
Although I have disclosed herein the preferred practice
and embodiment of my invention, I intend to cover as
well any change or modi?cation therein which may be
made without departing from the spirit and scope of the 35
invention.
I claim:
‘1. In an automatic wire-tying machine designed and
adapted to draw wire from a source of supply, feed the
References Cited in the ?le of this patent
UNITED STATES PATENTS
623,701
Brisselet ______________ __ Apr. 25, 1899
2,532,162
2,864,303
Goss ________________ __ Nov. 28, 1950
Brown et al ___________ __ Dec. 16, 1958
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