An Improved Machine for Fixing Threads in Envelopes.
Year: 1895

page_text: Date of Application, 13th Sept., 1895
Complete Specification Left, 6th June, 1896-Accepted, 25th July, 1895
PROVISIONAL SPECIFICATION.
An Improved Machine for Fixing Threads in Envelopes.
1, THOMAS RICHARD SHILLITO of 89 Chancery Lane, London, W.C., Engineer
and Patent Agent, do hereby declare the nature of this invention, a communication
to me from abroad by Max Grube of San Francisco, California, U.S.A., Merchant,
to be as follows:-
This invention relates to improvements in mechanism for fixing threads in
envelopes and it consists firstly, in the employment of two oppositely disposed
double armed rotary conveyors having jaws to grasp the threads and deposit each
thread alternately in the crease of a partially folded envelope; secondly, in an
improved construction of said conveyor arms and jaws and in means connected
therewith for seizing, cutting, releasing, and withdrawing the scrap threads from
said jaws and conveying them from the machine; thirdly in means for cutting the
thread both at the spool and at the envelope folding table; fourthly, in means for
operting the jaws of the thread carrier, and fifthly in means for operating the
envelope flap folder in connection with the conveyor arms.
The table of the machine may be secured to or form part or continuation of the
table of an envelope machine. The operating shaft is carried over the table of the
machine in bearings and is geared to the driving shaft of the envelope machine.
The thread conveyor arms are fixed on the operating shaft and have upon their
ends gripping jaws, the inner faces of which are at such a distance apart that a
measured length of thread will be carried by said arms, said length being sufficient
for the ends to project from the envelope to tear the same open. One set of
gripping jaws are formed upon the ends of the conveyor arms and the other set
are pivotted thereto by a pin which projects from the inner face thereof to operate
the thread shears.
The operating shaft carries a bevel wheel which engages with a pinion on a
countershaft supported in bearings secured to the machine table, the wheels being
of such diameter that the countershaft will make twice the number of revolutions
of the operating shaft. A crank secured to the countershaft is in connection with
and operates to reciprocate a thread carrier on a guide rod supported in a horizontal
position in such a way that the thread will be carried across the plane of the
envelope in the rear thereof and delivered to the jaws of the conveyor arms at
each half revolution of the operating shaft and conveyed by said arms to the
partially folded envelope.
In connection and moving with the sliding sleeve of the thread carrier are
thread gripping jaws. These are normally held closed by a spring but are opened
to seize the thread by the passage of inclined plates in the path of the jaws so as
to momentarily open them and allow them to close again upon the thread.
The thread is held upon a spool supported upon a vertical pin and plate in such
a position that the thread may be passed through an aperture at the foot of a
tubular holder also secured to said plate and supporting a cylindrical weight fitting
the interior of said holder and resting with sufficient force upon the thread to obtain
the requisite tension. The end of the thread passing through the foot of the tubular
holder enters freely the funnel shaped end of a thread guide, the tubular projection
of said guide being directed to the middle portion and line of movement of two
sets of clamping jaws and cause the end of the thread to project straight out to be
squarely and securely caught between the clamping jaws of the thread carrier.
When thread is drawn out from the thread holder immediately over the open

page_text: jaws of the thread conveyor, a gummer arm carried by a spoon pivotted to a
plate projecting from the table and dipping into a gum receptacle is lifted from
said receptacle by a cam fitted upon the operating shaft and pressed beneath and
against the thread at a suitable time after the thread carrier has passel, to gum the
thread.
A pair of spool shears or cutting blades are pivotted to a vertically projecting
plate which supports the thread holder and tension device. The shears are held
at a suitable distance from the thread holder to leave an end of the thread
projecting therefrom. A swinging arm pivotted at its lower end to a plate carries
a double pair of projecting pins, each pair to hold between them the lever ends
of the shears and when swung backward and forward with the swinging arm will
open and close the shears to cut the thread at the proper moment.
movement is timed and effected by a double cam secured to the operating shaft.
The operating shaft is carried at such a distance from a trap door in the envelope
table as is convenient for the discharge of the envelopes.
This
The top edge of the trap door aperture midway of its length is adapted to
receive the hinge joint of a rear folding leaf, end folding leaves and a short hinged
folding strip at the ends and forward side of said discharge aperture being hinged
respectively to the ends and remaining sides of said aperture and all being con-
nected with the moving parts of the envelope machine, to be operated by the same
at intervals. At the ends of the rear folding leaf and in close proximity to the
inner faces of the conveyor arms are located upright stationary cutter blades at
such a distance from the ends of the envelope that the thread will project a suitable
distance therefrom, and swinging blades pivotted to said stationary blades are
connected at their lower ends by a spiral spring to the table of the machine the
said spring serving to hold said blades apart at their cutting edges. A pivot pin
projecting from the inner faces of said arms pushes against rounded upper ends of
the swinging cutter blades and operate said blades to cut the threads upon each
end close up to the inner faces of the carrier arms and allow of properly measured
threads, at the moment before the thread is released from the conveyor arms, to be
deposited in the crease of the partially folded envelope. After the thread has
been thus cut and deposited, the projecting pins of the conveyor arms continuing
their rotation press against the forwardly extended arm of a lever pivotted to a
bracket secured to the under side of the table which lever is in connection with
the long arm of a pressing finger also pivotted to said bracket, and pressing against
the rear side of the rear folding leaf presses said leaf down the moment after the
thread has been placed inside the rear fold of the envelope and a spring con-
nected to the short arm of the pressing finger restores the leaf to its normal
position. The remaining folding leaves, trap door and follower are operated in any
suitable manner.
Dated this 13th day of September 1895.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.c.
An Improved Machine for Fixing Threads in Envelopes.
I, THOMAS RICHARD SHILLITO of 89 Chancery Lane, London W.C. Engineer
and Patent Agent, do hereby declare the nature of this invention, a communication
to me from abroad by Max Grube of San Francisco, California, U.S.A., Merchant,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in machines of a kind wherein a thread
drawing mechanism operates to draw the threads from a spool in measured lengths;

page_text: a pair of oscillating fingers operate to seize the thread and lay it in position in the
folds of the envelope blank, before the envelopes are folded down; and a cutting
device operates to sever the threads from the spool.
The invention consists in the employment of two oppositely disposed double
armned rotary conveyors having jaws to grasp the threads and deposit each thread
alternately in the crease of a partially folded envelope; in an improved construc-
tion of said conveyor arm, jaws and special features of construction connected
therewith for seizing, cutting, releasing and withdrawing the scrap threads from
said jaws, and conveying them from the machine and for cutting the thread both at
the spool and at the envelope folding table; in novel means for operating the jaws
of the thread carrier; and also in means for operating the flap folder in connection
with the conveyor arms.
In the accompanying drawings Fig. 1 is a plan of the mechanism of the
invention for attachment to envelope machines, shewing the thread carrier holding
the thread half drawn across the machine.
Fig. 2 a front elevation thereof.
Fig. 3 a vertical sectional elevation thereof in line y-y of Fig. 1 looking
towards the thread holding end of the machine, shewing by full lines the conveyors
in the position shewn in Figs. 1 and 2 and by dotted lines the conveyers shewn
in an advanced position having the jaws open ready to grip the thread presented
by the carrier, the opposite ends of the conveyor arms being in position to deliver
the thread to the partially folded envelope and shewing the thread cutters open
ready to cut the thread, and also shewing a rear folder flap operating mechanism
connected therewith.
Fig. 4 a sectional elevation, as in Fig. 3 but of the thread carrier side only
thereof, and shewing the thread cutting shears in the closed position.
Fig. 5 a detail in line ― of Fig. 1 shewing the thread gumming arm, reservoir,
and operating cam raised, in full lines, and lowered, in dotted lines.
Fig. 6 a similar detail in line w-w of Fig. 1 shewing the spool holder, thread
guide tube, and tension gumming arm, and inner face of thread carrier partly in
section, looking towards the envelope folding machine.
Fig. 7
a detail elevation partly in section looking towards the envelope machine,
shewing in detail the reciprocating gripping jaws of the thread carrier and the
stationary pivotted arms for operating said jaws, to open them, and by dotted lines
shewing the arms raised to allow the jaws to pass; and Fig. 8 a perspective view
of a fragment of the table of an envelope machine shewing the conveyor arms in
position to deliver the thread to a partially folded envelope, and also shewing the
several parts of an envelope folding machine immediately connected with the
threading mechanism.
The table of the mechanism may be secured to or form a continuation of
the table of the envelope machine as shewn in Fig. 1, the operating shaft 2 being
supported in bearings 3 upon said table in rear of the trap door 4 through which
the envelope after having been completely folded with the opening thread applied
thereto is dropped into a dryer wheel or other suitable device such as hereinafter
described.
The operating shaft 2 is geared to the driving shaft of the envelope machine in
such manner that said shaft will rotate positively and regularly once while each
two envelopes are being made, the shaft 2 being provided with two double
oppositely disposed conveyor arms 5, 6, and 7, 8, adapted to the length of the
envelope, each having upon its ends gripping jaws 9, 10, the inner faces of which
will be of such distance apart that a measured length of thread will be carried by
the said arms, the length of the thread being such as to permit the ends of the
thread to project from the ends of the envelope a sufficient distance to admit of
their being caught hold of by the fingers to tear open the envelope. The gripping
jaws 9 are formed upon the ends of the conveyor arms, and the jaws 10 are
pivotted thereto by a pin 11 which projects from the inner face thereof to operate
the thread shears.

page_text: +
The operating shaft 2 carries a bevel gear 12 which engages with a bevel
pinion 13 on a countershaft 14 supported in bearings 15 secured to the table 1 and
of such diameter that the shaft 14 will make two rotations to each rotation of the
operating shaft 2, and a crank 16 secured to the shaft 14 carrying a crank pin 18
and connecting rod 19 is connected to and operates a thread carrier 20 and is
caused to reciprocate thereby upon a guide rod 21 supported in a horizontal
position upon the table 1 in such manner that the thread will be carried across
the plane of the envelope in the rear thereof and delivered to the jaws of the
conveyor arms at each half rotation of the operating shaft 2 and conveyed by said
arms to the partially folded envelope.
The thread carrier 20 is composed of a sliding sleeve 22 to fit the guide rod 21
and connected to the end of the rod 19 by a pin 23 fitted upon said sleeve, and
head projecting from the side of said sleeve consisting of vertically disposed side
plates 24 connected by a horizontal web 25 above which and between said plates 24 is
pivotted a gripping jaw 26 pivotted thereon by a pin 27, the middle portion of the
jaw 26 having secured thereto a plate spring 28 which rests at its free end upon the
web 25 and extending back behind the pivot pin 27 tends to keep the forward end
of the jaw 26 pressed down to its work.
A similar gripping jaw 29 is secured below the web 25 and between the
plates 24, and is pivotted thereon by a pin 29* and carries a plate spring 30 in a
manner similar to that of the jaw 26 to bear upon the underside of the web 25 and
presses the jaw 29 up to its work. Each of said jawe 26 and 29 respectively, have
clamping plates 31 and 32 projecting laterally from their inner faces in the line of
movement of the thread when the latter is carried in position to be seized by the
conveyor arins 5, 6 and 7, 8.
The plates 31 and 32 have rubber covered opposing surfaces 31x, to hold the
thread more firmly, and are opened to seize the thread by the following means:-
The forward ends of the jaws 26 and 29 have respectively laterally projecting
and oppositely inclined plates 33 and 34 flaring towards their forward ends which
engage and are pressed apart by similar and oppositely inclined plates 35 and 36
upon spring actuated jaws 37 and 38 similarly disposed and pivotted at 37* and 38*
respectively to plates 39 and 40 connected by a horizontal web 41 and secured to
the spool end of the frame near and at one side of the thread delivering aperture.
The jaws 37 and 38 have spring plates 42 and 43 secured to them to press at their
free ends upon the intermediate web 41 as in the case of the jaws 26 and 29 and
their spring connections.
The jaws 37 and 38 are arranged in the same plane as that of the plane of
movement of the jaws 26 and 29 and the free ends of one set of jaws are presented
towards the free end of the opposing set of jaws in such manner that the inclined
plates 35 and 36 will push between the inclined plates 33 and 34 to open said
jaws when they have reached the end of their movement to cause the clamping
plates 31 and 32 to open, and when the plates 33 and 34 have passed the inclined
plates 35 and 36 to close upon the end of the thread projecting from the thread
holder, and grip the thread firmly between the rubber faced clamping plates, thus
holding the thread securely to draw it across the plane of the envelope upon the
return movement of the thread carrier and their gripping jaws.
Upon the return movement of the gripping jaws, the inclined plates 33 and 34
of said jaws press upon the inner faces of inclined plates 35 and 36 of the jaws 37
and 38 and lift the free ends thereof, thus allowing the gripping jaws of the thread
carrier to pass unobstructed upon their return movement to carry the thread to the
conveyors.
The thread is held upon a spool 44 supported upon a vertical pin 45 and plate 46
secured to the table 1* in such position that the thread 44* may be passed through
an aperture at the foot of a tubular holder 47 also secured to the plate 46 and
supporting a cylindrical weight 48 fitting the interior of said holder snugly,
and resting with sufficient force upon the thread to secure the required tension
thereon.

page_text: The end of the thread passing through the foot of the tubular holder enters
freely the funnel shaped end of a thread guide 49 the tubular projection of said
guide being directed to the middle portion and line of movement of the clamping
jaws 31 and 32 and cause the end of the thread to project straight out to be
squarely and securely caught between the clamping jaws of the thread carrier.
When thread is drawn out from the thread holder across and immediately over
the open jaws of the thread conveyor, a gummer arm, carried by a spoon 50.
pivotted at 51 to a plate 52* projecting from the table 1 and dipping into a gum
receptacle 52 is lifted from said receptacle by a eam 53 fitted upon operating
shaft 2 and pressed beneath and against the thread at a suitable period of time
after the thread carrier has passed said gummer spoon, to gum the thread its inner
length, and except at suitable lengths from the ends thereof, to avoid soiling or
gumming up the shears, gripping jaws, and other surfaces, over which the ends of
the thread is passed before it is deposited and secured beneath the fold of the
envelope. On the return movement of the thread carrier the cam permits the
spoon 5 to drop into the gun receptacle for a fresh supply ready to be again
lifted up when the thread carrier and a new measure of thread has been sufficiently
drawn across the machine. The spoon 50 is crooked or bent in a suitable manner
shewn to hold the gum in sufficient quantity to cover the thread and also to draw
the thread towards the conveyor jaws and prevent the thread from being drawn
out of the conveyor jaws before the ends of the thread have been securely seized.
between them.
The gum receptacle 52 is connected by a conduit 52×× with a reservoir 53, not
shewn in Fig. 8, holding a sufficient quantity of gum to maintain a constant level
for a suitably continued time within the said receptacle.
Two standards 54 secured to the table 1* directly outside the path of the
conveyor arms carry a cam shaped track or way 55 in a parallel plane with and to
intercept a pin 56 at the projecting end of the pivotted jaw 10 of the conveyor
arms and press open said jaws as the arm and its projecting pin moves from the
position shewn by full lines to the position shewn by dotted lines in Fig. 3 and holds
them open a suitable time to permit the thread to be placed sufficiently between said
jaws to securely hold it and permit it to be cut off at such distance from the thread
holder, as shewn in Fig. 8, that a stub end of a sufficient length may be left pro-
jecting from said thread holder to permit the said end of the thread to be caught
between the clamping jaws of the thread carrier upon its next movement forward
to draw the next measured length of thread from the spool.
A pair of spool shears 57 or cutting blades, are pivotted to a vertically
projecting plate 60 which supports the thread holder and tension device, and
forming a right angled extension of the plate which supports the spool end of the
table 1, which latter plate also supports the spool holder plate 46, the spool end
of the guide bar, and the supporting block of the thread gripper opening jaws.
The shears are thus held at a suitable distance from the thread holder to leave a
stub end of the thread projecting therefrom as above described.
A swinging arm 58 pivotted at its lower end to the plate 60 carries a double
pair of projecting pins 61, each pair to hold between then the lower ends of the
shears, and when swung backward and forward with the swinging arm 53 will
cause the shears held upon their fixed pivot to be opened and closed to cut the
thread at the proper moment. This movement is properly timed and effected by
a double cam 6!" secured to the operating shaft 2 which presses the swinging
arm 58 rearwardly to open the shears, and when the cam plates release a pin on
the end of the forwardly projecting elbow 58% of the arm 58 and allow the said
arm to be pushed forward by a spring 62 secured to the plate 60 to press against
pin or projection upon the swinging end of arm 58 and thus close the shears to cut
off the thread in time to permit the conveyors to carry it to the partially folded
envelope.
23
The operating shaft 2 is supported in bearings upon extensions 1** of the envelope
table at such distance from the rear edge of the trap door 4 which is hinged to the

page_text: underside of said table at the ends of the under edge and of the rear side of the
rectangular envelope discharge aperture 63, Fig. 8, and also more clearly in
Fig. 3.
The top edge of aperture 63 mid way of its length is adapted to receive the hinge
joint of a rear folding leaf 64 the end folding leaves 65 and the short hinged
folding strip 66 at the ends and forward sides of said discharge aperture, being
hinged respectively to the ends and the remaining sides of said aperture, and all
being connected with the moving parts of the envelope machine to be operated
thereby at suitable intervals.
At the ends of the rear folding leaf 64, the end folding leaves 65, and the short
hinged front folding strip 66 at the ends and forward sides of said discharge
aperture are hinged respectively to the ends and the remaining sides of said
aperture. At the ends of the rear folding leaf 64 and in close proximity to the
inner faces of the conveyor arms 5, 6 and 7, 8, are located upright stationary cutter
blades 67 at such distance from the ends of the envelope that the ends of the thread
will project a suitable distance therefrom, and swinging blades 68 pivotted at 69 to
said stationary blades are connected at their lower depending ends by a spiral
spring 70 to the table 1 of the machine, the said spring serving to normally hold
said blades apart at their cutting edges.
The pivot pin 11 projecting from the inner faces of said arms push against
rounded upper ends of the swinging cutter blades 68 and operate said blades to cut the
threads upon each end close up to the inner faces of the carrier arms, and allow
properly measured threads and projecting ends thereof at the moment before the
thread is released from the conveyor. arms to be deposited in the crease of
the partially folded envolope. After the thread has been thus cut and deposited,
the projecting pins of the conveyor arms continuing their rotation, press against the
forwardly extended arm of a lever 71 (Fig. 3) pivotted to a bracket 72* secured
to the underside of the table which is connected with the long arm of a pressing
finger 72 also pivotted to the bracket 72x projecting from the underside of the said
table 1 and pressing against the rear side of the folding leaf 64, presses the said leaf
down at the moment after the thread has been placed inside the rear fold of the
envelope, and a spring 73 connected to a short arm of the finger 72 restores
the leaf 64 to its normal position.
The remaining folding leaves, trap door 4 and follower 74 are operated in any
known or preferred manner. It will be readily observed that the rear folding leaf
is inclined rearwardly at a suitable angle to allow the thread held between the
conveyor arms to sweep over it in the are of a circle in close proximity thereto,
the flap forming nearly a complete chord to said are, thus permitting the creasing
frame 75 through which the follower 74 passes to be held in close proximity to the
table 1 by means of the short pillars 76, 77, supported upon said table, the rear
pillars 77 being separated sufficiently to allow the conveyor arms
to pass
unobstructedly between them. The gripping jaws at the ends of the conveyor
arms each have double plates as shewn clearly in Fig. 1 which provide better
security in holding the thread, and also provide an intermediate space 78 through
which is projected a hook or finger 80 extending from a chute or box 79 which
encloses upon the end of an arm $1 supported upon a plate 82 which serves to pull
the thread from the jaw in its upward movement as shewn in Fig. 3.
The operation of the envelope threading attachment is as follows:-
A blank being placed in proper position upon the creasing frame in any well-
known or preferred manner, the follower is pressed down, carrying with it the
blank and leaving the same properly creased upon four sides upon the trap door,
the follower is then raised and two of the conveyor arms carrying a thread properly
gummed, deposit it in the crease of the rear Hap of the envelope, the end Haps
being quickly folded over as soon as the follower has been withdrawn sufficiently
to allow them to pass, the thread is cut off at the ends as soon as it touches the
crease of the rear flap, and the conveyor arms continuing their rotation, the pro-
jecting pins of the conveyor jaws press upon the short levers to push back the

page_text: finger which operates the rear flap folder, the short front strip having been folded
over at the same time with the rear flap, the latter is then pulled back to its open
position and the trap door is opened to permit the finished envelope to fall into the
conveyor beneath the table 1 and carried from the machine, the conveyors
continuing their rotation, the pins projecting from the outer sides of their jaws
engage with the circular cam track and open the jaws to receive the next thread,
the scrap thread ends being pulled out from between the jaws and dropped into the
chute receptacle. Just before the conveyor arms reach the cam track the thread
carrier reaches the end of its movement towards the thread holder, the clamping
jaws are pressed open by the inclined plates and grasp the end of the thread
projecting from the thread holder, the thread carrier immediately begins its return
movement as the conveyor arms pass over the cam track, the inclined plates of the
end block are pushed apart and the carrier moving across the plane of the envelope
in rear thereof, first passes the gummer spoon which is raised by its cam to gum
the thread at nearly its entire length, except at sufficient distance from the ends,
the thread carrier moving the full length of its throw, deposits the thread
between the conveyor jaws, the latter being then immediately closed thereon,
and the thread carrier commencing a further movement towards the thread holder,
the gummer spoon is dropped out of the way of the movement of the thread
carrier, the holder shears are at once operated and the severed and measured
length of thread held by the conveyor arms is carried forward in the arc of a
circle and deposited in front of the rear flap of the next envelope to be folded as
hereinbefore described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. An envelope threading machine provided with a thread carrier for drawing the
thread across the plane of the envelope, two oppositely disposed double armed
rotary conveyors having jaws to grasp the thread in measured lengths and deposit
each thread alternately in the crease of partially folded envelopes, substantially as
described and shewn.
2. An envelope threading machine provided with a reciprocating thread carrier
and conveyor arms for receiving thread therefrom, each having a double plate,
parallel fixed jaw and a double plate pivotted jaw to engage therewith and seize
the thread with double bearing surfaces at each end to carry it securely to the
envelope without slipping, substantially as described and shewn.
3. An envelope threading machine provided with a reciprocating thread carrier,
and conveyor arms for receiving the thread therefrom, each having double plate
jaws for gripping the thread and a fixed finger upon the frame held between said
plates during their movement to withdraw the scrap threads therefrom, substantially
as described and shewn.
4. An envelope threading machine having a thread carrier and conveyors for
delivering the thread to a partially folded envelope, shears for cutting the ends of
said threads in measured lengths, pickers for disengaging the scraps from the
gripping ends of the thread conveyors, and a chute for conducting the thread from
the machine, substantially as described and shewn.
5. An envelope threading machine having a thread carrier for drawing the
thread across the plane of the envelope, thread conveyors having a pivotted jaw to
grasp the thread in measured lengths and deposit it in the crease of a partially
folded envelope, and a curved track plate adapted to press against a projection of
said jaw and open the same to receive the thread from the carrier at the proper
moment, substantially as described and shewn.
6. An envelope threading machine having a thread carrier for drawing the
thread across the plane of the envelope and delivering it to a partially folded
envelope, and thread cutting shears supported upon a fixed pivot near the thread

page_text: holder and operated by a spring actuated swinging arm, and a cam upon a
revolving shaft of the machine, substantially as described and shewn.
7. An envelope threading inachine having a thread carrier for drawing the
thread across the plane of the machine and depositing it in thread conveyor arms
for delivering to the partially folded envelope, and a vibratory gumming arm
adapted to dip into a gum receptacle and lift the gum to the thread at properly
regulated intervals, substantially as described and shewn.
8. An envelope threading machine having a thread carrier for delivering the
thread to a partially folded envelope, a gummer device and a gum receptacle
having a conduit connection with a gum reservoir, substantially as described and
shewn.
9. An envelope threading machine having a reciprocating thread carrier for
delivering the thread to a partially folded envelope, a thread holder having a
gravity tension weight fitted in a holder thereof through the bottom of which the
thread passes and is pressed upon by the weight, and the tubular thread holder
and cutting shears, substantially as described and shewn.
10. An envelope threading machine having a reciprocating thread carrier,
conveyor arins for delivering thread to a partially folded envelope, and cutters
fixed to the table at the ends of the rear folding envelope flap, one of said
cutters being pivotted and acted upon by a projection from the conveyor arm to
operate the same and cut the ends from the said thread at the proper moment,
substantially as described and shewn.
11. An envelope threading machine having a reciprocating thread carrier for
delivering the thread from the thread holder to a partially folded envelope, fitted
upon a guide bar and having pivotted gripping jaws to seize the thread, an inclined
plate or plates upon said jaws and similar oppositely inclined plate or plates upon
a pivotted arm or arms for opening the said gripping jaws and for allowing them
to close, substantially as described and shewn.
12. An envelope threading machine having a reciprocating thread carrier,
conveyor arms for delivering the thread to a partially folded envelope, and a rear
flap folder operated by said conveyor arms, substantially as described and shewn.
Dated this 6th day of June 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.