Improvements in Machines for Making Envelopes.
Year: 1895

page_text: Date of Application, 25th June, 1895-Accepted, 24th Aug., 1895,
COMPLETE SPECIFICATION.
Improvements in Machines for Making Envelopes.
We HENRY BUCKLEY COOLEY, 10 Walnut Street, JOHN MADISON NOBLE,
144 Albany Avenue, and JAMES EDWARD TREVOR, 37 Chestnut Street,
Machinists, all of Hartford, Connecticut, United States of America, do hereby
declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
1
The object of our invention is to provide a machine for making envelopes from
the blanks, which will be effective in operation and capable of materially increasing
the output over machines for like purpose now in use; and with this general
object in view we have produced improved mechanism for folding blanks and for
feeding the blanks to the gumming mechanism, improved mechanism for applying
the gum to the flaps, and for pressing the said flaps after passing through the
gumming mechanism; and in general we have by our invention materially improved
the construction and operation of machines of this class.
We will describe our invention with reference to the accompanying drawings.
Figure 1 is a top plan view of a machine constructed according to our invention.
Figure 2 is a side elevation of the same.
Figure 3 is a longitudinal vertical section on line 3-3. Figure 1.
Figure 4 is a view of the underside of the machine.
Figure 5 is a top view of the folding mechanism.
Figure 6 is a detailed view of the kicker mechanism.
Figure 7 is a sectional detail, on line 7-7, Figure 1.
Figure 8 is a vertical section of part of the lower gumming roll.
Figure 9 is a transverse vertical sectional detail of the lower gumming roll and
pawl mechanism.
Figures 10 and 11 are details of the folding plates.
Figures 12, 13 and 14 are sectional details of the pressing and delivering rolls.
Figure 15 is a view of blank with side flaps folded and gum applied thereto.
The same reference characters designate like parts in the different views, in
which 1 indicates the side frames which support in suitable bearings, 2, the various
rolls, their operating mechanisin and the table on which the blanks travel in their
passage through the machine. The feed table 3 is attached to the end of the
machine and is preferably of the form shown and described in the Specification to
Letters Patent granted to us numbered 23,568 of 1894, though it is to be under-
stood that the feed table and its feeding mechanism do not form any part of the
present invention and may obviously be replaced by any suitable feeding
mechanism.
Briefly described, this feeding mechanism, as shown, consists of the inclined
table 3 provided with the guide posts 4 between which the blanks rest upon the
table with their front flaps extending over an aperture in the table. Journalled
below the table are two feed rolls 7 and 8, the upper one of which is recessed for
the passage of the front end of the blank therethrough when it is separated from
the bottom of the pile by the reciprocating suction pipe 74, shown in dotted lines
and operated by any suitable mechanism. As the blank is drawn downward by
the suction pipe it comes tangent to the lower roll 7, at which point the upper roll
grips the said blank between the edge of the recess and the surface of the lower
roll, stripping the blank from the pipe and the two rolls feed it forward upon the
D
A

page_text: table 5, which is secured by suitable brackets 6, to the sides of the frame of the
machine. A stay rod 76 at the rear of the machine connects the two side frames
at this point.
At a suitable distance from the feed rolls 7 and 8, are situated the creasing
rolls 9 and 10, journalled in bearings on the side frames of the machine, the upper
one of which is provided circumferentially near each end with bevelled flanges a
forming knife edges, and upon the lower roll are placed rubber or suitable flexible
bands 46, let into grooves near each end thereof. The knife edges of the flanges a,
are set apart from each other a distance equal to the length of the body of the
envelope, and rotate in contact with the flexible bands in the lower roll.
By these
rolls the blank is creased along a line between the side flaps and the body of the
envelope, preparatory to the folding of the said flaps over on to the body of the
blank by the folding mechanism through which the blank next passes.
Secured to a shaft 68, below the table 5, are two cams 66, set with their
acting surfaces in line upon the same side of the shaft so that as the shaft rotates
the two thin folding plates 65, will be caused to move toward and from each other
through the medium of the studs, 69, upon the plates projecting downwardly
through slots 75, in the table and held in contact with the said cams by suitable
springs 67, attached to screws on the plates, passing through slots in the table 5.
The front edges of the two plates 65, work under the guiding strips 76, secured
close against the table 5, causing the flaps b, and c, to pass above the plates 47
which are secured to a cross bar 48 the two thin guide plates 47, having their
outer edges in line with the creasing flanges a. The cross bar 48, is connected
by arms 49, with the rock shaft 53, which has an arm 50, in which there is a set
screw 51, normally pressed against the side of the journal bearing 2, by a spring 52,
the tension of which spring is regulated by the set screw to obtain the proper
pressure of the plates 47, against the table, according to the thickness of the paper
passing under the same. The movement of the plates 65 inward, is sufficient to
overlap the two thin guide plates 47, and fold the flaps b and c of the blank, as
shown in Figure 5. The cams 66, are formed with a dwell sufficient to cause the
folders 65, to remain in their outer position until the side flaps b and c pass over
and clear the guide strips 76, and the upper surface of the said folders; and
upon clearing these guide strips the acting portion of the cams 66, cause the
plates 65, to move quickly toward each other, folding the said flaps over the thin
guide plates 47.
The envelope is now to be creased along the longitudinal edges of the body;
this is accomplished by the next pair of rolls 11 and 12, which are journalled one
above the other, and receive their motion through suitable gears on the outer ends
of their shafts, as shown in Figure 1, the lower roll in the present instance being
mounted upon the main driving shaft 70, to which is secured a sprocket wheel 71.
The upper roll 12, has two longitudinal ribs 77, arranged circumferentially a
distance apart equal to the width of the body of the blank and meshing with
corresponding grooves 78, in the lower roll 11. Secured to the table 5, in front of
the two rolls is a guide plate 56, extending across the table and attached at its
outer ends to the table by any suitable means, and bent upwardly for the purpose
of insuring the proper alignment of the biank as it enters between the two
creasing rolls.
Attached to the cross, bar 54, are two wires 55, extending rearward to the last
fixed pair of rolls 15 and 16 in the machine, passing through grooves in the rolls
near their outer ends, as shown clearly in Figures 1 and 3; these wires serve as
guides for the envelopes which pass between them and the table 5, and also act as
strippers.
The gumming rolls 13 and 14, are mounted in the frames to the rear of the last
two creasing rolls and are so constructed that they will rotate in contact only while
gum is being applied to the flaps of the envelope. To accomplish this, we provide
the upper roll 14 which consists of two end dises or hubs, and a cylindrical body
portion between them, having attached to its surface, at a proper distance

page_text: apart, two gummers 28 and 29, which are preferably of metal and have their outer
surfaces flush with the circumference of the end discs. The lower or impression
roll 13, consists of two flanged hubs, 79, between which is rotatably mounted the
impression roll 13, which is intermittently rotated by the clutching mechanism to
be described. The outer surface of the impression roll is provided with a pad of
rubber 35 or other suitable flexible material against which the envelope blank rests
as the gum is being applied by the rotating gumming roll. The surface of this
lower roll 13, is cut away at 33, and is provided at the forward end thereof with a
bard metal bearing strip 34, against which the gravity pawl 37, normally acts to
hold the roll against rotation.
In the body of the impression roll are formed recesses in which are located
pins 39, normally pressed outward by a spring 40', to cause the bevelled end of the
pins to enter corresponding recesses in the flanged hub. As long as the pawl 37,
engages the strip 34, the flanged hub which is secured to the central shaft, will
rotate with the said shaft, and as the recesses therein pass the pins they will be
forced into the same by the spring but will be forced out again since the roll 13 is
held against rotation by the pawl 37. In order to cause the two flanged hubs to
be locked to this roll by the pins 39, it is necessary to release the pawls 37. This
is effected by the envelope before it passes between the gumming rolls in the
following manner: The pawls 37, are secured upon each side of the machine to
rock shaft 38, journalled below the table, and from which arms 72, project
upwardly through slots 80, in each side of the table, outside of the line of travel of
the blank, and upon the upper ends of the said arms are fingers, 36, curved on the
lower faces and offset laterally to bring them within the outer limits of the blanks.
These fingers or trips project through openings 81, their ends extending slightly
below the table. As the paper or blank comes in contact with the fingers 36,
the pins 39 will be in the position of entering the recesses in the flanged hubs 79,
and the entering edge of the said pins will exert a pressure upon the forward side
of the recesses, tending to move slightly backward the roll 13, which is free upon
its shaft, thus relieving for the time the pressure of the pawls 37, upon the
strip 34, and as the blank is now moving against the fingers 36, the latter will be
raised to allow the blank to pass under them, thereby disengaging the pawls, and
consequently the pins 39 will lock the hubs and the rolls together, causing them to
rotate together, bringing the pad 35, underneath the blank as the gummer comes
into position to spread the gum upon the flaps.
In the further rotation of the roll 13, the pawl 37, drops into the groove 33, and
coming in contact with the bearing strip 34, again holds the said roll 13, against
rotation until the next blank comes under the fingers 36. By this mechanism it
will be seen that the lower roll is only rotated when the blank or paper is between
it and the upper roll, thereby preventing the gummers from depositing the gam
upon the rolls themselves, thus avoiding the necessity of frequent stoppage of the
machine to clean the rolls.
Although two recesses, and two springs 40¹ are provided in the roll 13, it is
obvious that a single opening running through the entire length of the roll, with a
single spring therein between the two pins, may be used; while two pins 39 are
preferable, it is to be understood that one pin and recess might be used for the
purpose.
:
Mounted above the roll 15, is a skeleton roll, formed of the two hubs 16, secured
to the shaft 26, which is rotated by a gear 82, meshing with a gear 83, upon the
shaft 84, carrying the lower roll 15. This lower roll 15, is made of two cylindrical
portions between which is rotatably mounted the flanged collar 43, upon the same
shaft. Between the flanges of this collar is secured a finger 45, which in its
normal position rests upon the oscillating table 44; this table 44 is mounted upon
the rock shaft 40 which receives the rocking motion from cam 63, (Figure 15)
through the arm 61, on which there is a friction roller 62, held in contact with the
said cam by a spring 64 (Figure 4); connecting the arm with a fixed part of the
machine. The flanged collar 43, is connected to the rock shaft 40, by a link 42,

page_text: pivotally connected to the arm 41. The cam 63, is so timed that it will cause,
through the intervening mechanism described, the collar 43 to rock upon the
shaft 84, elevating the finger 45, at the same time slightly rocking the table 44.
This finger throws the advancing flap of the blank upward, as shown in Figure 12,
for the purpose to be presently described.
Upon a shaft 22, mounted in fixed bearing in the frame of the machine, is a
roil 18, upon which is journalled a frame 87, to which frame is secured the check
box, 21, having two convergent sides, through which preferably pass pins 88. In
the lower portion of the said frame 87 the lower pressing roll 17, is mounted, driven
by a gear on its end meshing with a gear on the shaft 22. It thus receives its
motion of rotation from the shaft of the roll 18, and is capable of a rocking
motion with the frame around the said roll as a centre. The roll 18 receives an
oscillatory motion from the quadrant rack 24 mounted on the frame 1, vibrated
back and forth by the eccentric 32, on the main driving shaft connected to the
quadrant by its rod 31. A pinion 23, on the end of the shaft 22 imparts to the
said shaft an oscillatory motion from the quadrant rack. Upon the shaft 59,
rotated by a gear 89, is a cam 58 in the groove 75', of which, runs a roller attached
to an arm 60, which is connected to the frame 87, thereby imparting to the said
frame an oscillatory motion around the shaft 22.
Arranged below the pressing rolls 17 and 18, in suitable bearings, are two
delivery rolls 19 and 20, through which the blank is finally passed, after passing
twice between the rolls 17 and 18, by which means, as will be presently seen, the
gummed flap is a second time pressed, to prevent it from loosening, thereby
insuring its permanent attachment to the side flaps of the envelope against which
it is forced. The operation of this portion of the device will be better understood
with reference to Figures 12, 13 and 14, in connection with Figure 3. As the
envelope is passed under the skeleton roll 16, the forward flap d, which is to be
permanently secured to the side flaps, is kicked upward by the finger or kicker 45,
diverting the end d, from the horizontal plane into the check box 21, which now
begins to move to the rear around the shaft 22, by the arm 60 and its operating cam.
As the frame 87, is now oscillated by the arm 60, the box 21, assumes the extreme
vertical position, as shown in Figure 12, where it dwells until the envelope is forced
against the same, causing the Hap to assume a position at substantially right angles
to the body f, of the blank. At this point the cam 58, begins to move the
frame 87, through the arm 60, towards its higher position, the feeding rolls 15
and 16, meantime forcing the body of the blank underneath the flap d, as shown
in Figure 13, at about 45° to the vertical, and causing the folded envelope to pass
between the rolls 17 and 18, which are now operated by the quadrant 24, and the
pinion 23, in the direction to draw the blank upward through them, pressing the
gummed flap tightly down against the edges of the side flaps. These rolls 17, 18,
are so timed as to draw the blank through them until the body portion of the
envelope has entirely passed between them leaving the flap e, projecting downwardly
from these rolls. The quadrant is now reversed, thereby reversing the operation
of the rolls which remain in the position shewn in Figure 14, until the blank is
fed through the lower delivering rolls, 19 and 20, one of which should be a skeleton
roll similar to the roll 16, in order to prevent the gum on the rear end flap from
coming in contact therewith.
To insure the blank aligning with the lower delivering rolls, we preferably
suspend from the table 44, two wires 85, one at each end, thereby insuring a proper
guiding of the blank between the said rolls.
The skeleton roll 16, is preferably mounted in yielding bearings, such for
example, as that shown in Figure 7, where 25 indicates a pivotted arm in which
the shaft 26, of the said roll is journalled, the opposite end of the arm having a
finger projecting within a recess in the side frame in which a spring 27, is arranged
to bear upon the said arm. By this arrangement the envelope passing between the
rolls can not in any case be torn or diverted from its course, since the yielding
pressure upon the bearings will allow for any occasional varying thickness, due to

page_text: any external cause, between the lower roll and the limited bearing surfaces of the
skeleton roll, which would not be the case if the bearing between the two rolls were
rigid and unyielding.
As shown in Figures 1 and 2, the fixed rolls forward of the driving shaft 70,
receive their motion from the said shaft through the intermeshing gears 90, 91, 92, 93.
94, 95, 96, 97, 98, and 99, while the rolls to the rear of the shaft receive their
motion through the gears 91, 101, 100, 102, 103, 89, 104, 83, 82, 105 and 106, in
the order named. The gears must of course be properly timed to cause the blank
to pass from the feeding rolls to the folding mechanism at the proper time; and
from the rolls 15 and 16 to the check box at such a time as to secure the operation
of the rolls 17 and 18, hereinbefore described. The upper series of rolls by the
gearing just described, it will be seen, rotate in the same direction with one another
toward the feed table while the lower rolls rotate in the opposite direction.
While we have shown a quadrant rack and the operating eccentric for trans-
mitting the oscillatory motion to the first set of pressing rolls, we do not wish to
be confined to this specific means as various mechanical motions might be adapted
for accomplishing this motion without departing from our invention. It is also to
be understood that various changes may be made in the details of our invention and
still remain within the scope of the same.
We cut away a portion of the hubs forming skeleton roll 16, as shown at 86
see Figure 3 so as to release the grip on the blank as the motion given the rolls 17
and 18 by the quadrant rack causes them to draw the blank forward faster than
the peripheries of the rolls 15 and 16 travel. We prefer to cut away a portion of
the roll 9, as shown at g, Figure 3, for the purpose of allowing the blank to fully
enter between the rolls and insure the gripping of the same.
It will be observed that the gum is put upon the end flap e, and the side flaps >>
aud c, after these side flaps b and c have been folded; and the gumming is
consequently the last operation performed by the machine prior to sealing the end
flap d, to the side flaps. The advantage of applying the gum to the side flaps b
and C instead of the end flap d, is that the side flaps having been folded and pressed
down will not curve when the wet gum is applied thereto as would be the case
where the gum is applied to the end flap d. These side flaps will therefore remain
flat against the body of the envelope, thus avoiding the liability of depositing gum
upon the working parts of the machine, while making the gumming operation the
last one before sealing, conducive to the same result, and likewise gives the gum
less time to dry before the end flap is sealed to the side flaps. We believe that we
are the first to construct a machine in which the gum is applied to the side flaps in
the manner hereinbefore described, after the said flaps have been folded, and we
think the features of our machine for accomplishing this purpose constitute
valuable points of advantage.
The distance between the various sets of rolls will of course be governed by the
size of the blanks used; and the proportions of the various parts, such as length of
the rolls, the size of the gumming surface, its shape, and so on, in like manner
depend upon the size of the envelope to be made.
:
We have not shewn the gum reservoir and the rolls for distributing the gum
upon the gummers, as these features do not form any part of our present invention,
and any of the usual means employed for this purpose may be adopted in
connection with our mechanism.
A machine constructed according to our invention possesses the advantages..of
greater simplicity and cheapness of construction; and is more compact and solid,
requiring much less floor space that machines now in use for making the same size
envelope. It is also free from jarring or straining motions, insuring increased
durability while the direction of motion of the blank is constant throughout the
machine, and not varying as in other machines of this class.
"!
And again, by the use of the reciprocating folding plates we secure a greater
accuracy in folding the flaps while the blank is being held by the rolls, and by the
use of the rubber bands upon which the transverse creases are made we obtain a

page_text: better crease, and prevent any lateral displacement of the blank in passing between
the creasing rolls.
In setting the various rolls it is to be observed that the distance between them
should be less than the width of the blanks, thereby insuring the forward end of
the same entering the next set of rolls before the preceding set has released the
said blank.
We do not wish to limit ourselves to the specific details of mechanism, which we
have described as embodying our invention, as changes in these details may be made
without materially departing from the essential features of our invention; for
example, the mechanism for securing the reversing motion of the two pressing rolls
might be varied without departing from our invention, as we believe ourselves to
be the first to pass the blank twice between the pressing rolls as described,
whereby the gummed flap is effectively attached, and the danger of its becoming
loosened, is thus guarded against. And in like manner, the clutching and tripping
mechanism employed on the gumming roll might be varied without departing from
our invention, as we believe we are the first to provide means for rotating the
impression roll of the gummer intermittently for the purpose of preventing the
gumming of the said impression roll.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. An envelope machine comprising supporting frames, a table over which the
blanks are fed, a set of creasing rolls for creasing the blanks along the side flaps, a
reciprocating plate folding mechanism arranged at the rear of the said creasing
rolls, and operating laterally of the line of travel of the blanks, to fold the side
flaps, a second set of creasing rolls, on the opposite side of the folding mechanism
the upper one of which rolls, is provided with longitudinal creasing edges for
creasing along the end flaps, gumming rolls arranged in the rear of the latter
creasing rolls for gumming the flaps, and mechanism for folding and pressing one
of the end flaps against the side flaps, substantially as hereinbefore described.
2. An envelope machine, comprising supporting frames a table over which the
blanks are fed, a set of creasing rolls for creasing the blanks along the side flaps, a
folding mechanism arranged at the rear of the said creasing rolls and adapted to
fold the side flaps, a second set of creasing rolls located on the opposite side of the
folding mechanism for creasing along the end flaps, gumming rolls arranged to
supply gum to the front edges of the side flaps and the rear flap, mechanism for
sealing the front end flap to the gummed side flaps, and delivery rolls through
which the envelope is delivered, substantially as herein before described.
3. In an envelope machine, mechanism for creasing the blank transversely and
longitudinally comprising a set of transverse creasing rolls, consisting of an upper
roll having circumferential creasing edges or flanges, and a lower roll provided
with bands of yielding material against which the creasing flanges of the upper roll
are adapted to bear, and a set of longitudinal creasing rolls consisting of an upper
roll provided with longitudinal flanges or edges and a lower roll having grooves
with which said flanges or edges mesh, whereby straight creases are insured without
jar or shock to the mechanism, substantially as herein before described.
4. In an envelope machine, the combination with mechanism for creasing and
folding the side flaps, mechanism for creasing the end flaps, and gumming rolls
adapted to gum the side flaps after they are folded and also the rear end flaps, of
pressing or sealing rolls through which the blank is drawn to fold and seal the
rear end flaps, and means for intermittently rotating the said rolls in opposite
directions, thereby subjecting the body of the blank to two pressing actions of the
rolls, thus permanently attaching the end flap to the side flaps, substantially as
hereinbefore described.
5. In an envelope machine, the combination with a lower impression roll provided
near each end with bands of yielding material seated in circumferential grooves of

page_text: an upper creasing roll provided with continuous circumferential flanges adapted to
bear upon the bands of yielding material on the lower roll to crease the blank
transversely as it is drawn through the said rolls, whereby shock.or jars to the
mechanism are wholly avoided and straight creases insured substantially as
herein before described.
6. In a folding mechanism for envelope machines, the combination with the
table over which the blank passes through the machine, of the guide plates under
which the blank is passed, the laterally movable folding plates, adapted to fold
the side flaps, the guide strips overlapping the forward edges of the said folding
plates and under which the said forward edges slide, and mechanism for causing
the said folding plates to intermittently move toward and from each other,
substantially as hereinbefore described.
7. In an envelope machine, the combination with the creasing rolls, of the
stationary plates secured to a cross bar above the said rolls, a rock shaft with
arms extending therefrom for supporting the said cross bar, an arm projecting
from one end of the said rock shaft and having a set screw in its outer end
normally held in yielding contact with the fixed part of the machine, whereby
the pressure of the said plates upon the table of the machine may be varied
with the thickness of the paper passing under the plates, substantially as herein-
before described.
8. In an envelope machine, the combination with the stationary plates pivotally
and yieldingly supported above the table of the machine, means for adjusting
the pressure of said plates upon the table, laterally movable folding plates
adapted to overlap the edges of the stationary plates, means for intermittently
moving the said folding plates, and guides for directing the side flaps of the
blank above the folding plate, substantially as and for the purpose hereinbefore
described.
9. In an envelope machine, the combination with the rolls for creasing the blank
transversely and the folding mechanism for folding the side flaps, of the set of
rolls for longitudinally creasing the said blank consisting of an upper roll having
longitudinal flanges, and a lower roll having longitudinal grooves in its surface
adapted to mesh with the said creasing flanges in the rotation of the rolls, substantially
as herein before described.
10. In an envelope machine, the combination with the gumming roll, of au
impression roll loosely journalled upon a shaft below the same and normally held
against rotation, a fixed part carried by and rotating with said shaft, and a
clutch device between these two parts, with means for releasing the impression
roll as the blank passes to the gumming roll thereby allowing the clutch device
to lock the impression roll and fixed part together, whereby the impression roll
is caused to rotate only when gum is being applied to the blank, substantially as
herein before described.
11. In an envelope machine, the combination of the gumming roll, the flanged
hubs having recesses in their inner faces and secured to the shaft journalled
below the gumming roll, the impression roll rotatably mounted upon the shaft
between the said hubs, pins within recesses in the body of the roll normally pressed
toward the hubs and adapted to enter recesses therein as the shaft rotates,
a pawl for holding the roll against rotation, and means for releasing the said
pawl as the blank passes under the gumming roll, whereby the pins may lock the
bubs and impression rolls to cause them to rotate together, substantially, as
hereinbefore described.
12. The combination with the gumming roll, of the impressiou roll free to turn
upon its shaft and having a portion of its circumference recessed, to clear the
gummers, spring actuated pins within the said roll, flanged hubs secured to a shaft
upon which the said roll is mounted, and provided with recesses in their faces
into which the pins are adapted to be pressed, a rock shaft having a pawl or
pawls normally engaging the front wall of the recess in the impression rolls,
fingers or trips extending upwardly from the said rock shaft, having their ends

page_text: below the line of travel of the blank so that as the blank passes to the gumming
roll, the fingers are raised, releasing the pawl, and allowing the pins to lock the
impression roll and hubs together, substantially as herein before described.
13. In an envelope machine, the combination with the gumming roll 14, of a
shaft carrying flanged hubs 79, the impression roll 13, free to turn upon said shaft
between the hubs, and having a recess 33, in its surface, spring pressed pins 39,
adapted to enter recesses in the flanged hubs, the rock shaft 38, journalled below the
table of the machine pawls 37. carried by said shaft and engaging the impression
roll, fingers or trips 36, attached to arms 72, on the rock shaft, and having their
outer ends extending slightly below the table, whereby the blank may lift the fingers
as it
passes under the same to release the pawls, substantially as and for the purposes
hereinbefore described.
14. In an envelope machine, the combination with the mechanism for creasing
the blank and folding the side flaps, and the gumming rolls, of the feeding rolls
:56 situated as to receive the gummed blank from the gumming rolls, positively
operated mechanism for engaging the bottom side of the blank and raising the
advancing point of the blank, means for checking the travel of the said point while
the blank is being fed forward by the feed rolls thereby folding the front flap at
the crease, and pressing rolls between which the blank passes, substantially as
hereinbefore described.
15. In an envelope machine, mechanism for folding and permanently attaching
the gummed flaps of a blank consisting of a skeleton roll journalled above the table
of the machine and bearing upon the outer edges of the blank, a roll journalled
below the same, a vibrating finger or kicker upon the shaft of the said 'lower roll in
line with the advancing point of the blank, means for intermittently raising the
said finger to direct the point of the blank upward, a pair of pressing rolls, and a
check device above the same against which the point of the blank is forced and
held while the feed rolls pass the blank forward causing it to fold at the end flap,
and enter the pressing rolls, thereby securing the end flap to the side flaps,
substantially as herein before described.
16. In an envelope machine, the combination with the feed rolls, of the kicker
mechanism consisting of the oscillating collar journalled upon the shaft of the lower
roll, the fiuger or kicker secured to the said collar across the line of travel of the
point of the blank, a rock shaft pivotally connected to the said collar, and means
for intermittently rocking the said shaft, substantially as and for the purpose
hereinbefore described.
17. In an envelope machine, the combination with the feed rolls, of a finger
vibrating across the line of travel of the point of the advancing flap of the blank,
'means for intermittently vibrating the said finger to divert the point of the flap
upward, and a checking device to hold the said point while the body of the blank
moves uuder the said flap, thereby folding the said flap upon the blank, substantially
as and for the purpose hereinbefore described.
18. In an envelope machine, the combination with the gumming roll journalled
above the table and the impression roll below the said table, of the feed rolls for
receiving the blank from the said gumming rolls, a collar loosely mounted upon the
shaft of the lower feed roll, a finger over which the blank passes secured to the
said collar, a rock shaft below the said finger, and operatively connected to
the collar, a cam on the shaft of the impression roll, and connections between the
said cam and rock shaft, for operating the latter, substantially as and for the
purposes herein before described.
19. The combination with the shaft 84 of a collar loosely mounted on the said
shaft, a finger secured to the said collar, a rock shaft carrying a table thereon
and connected to the collar, against the upper surface of which table the said finger
normally rests, with means for rocking the said shaft intermittently, substantially as
and for the purpose herein before described.
20. In an envelope machine, the combination with the feed rolls and kicker
mechanism, of the upper pressing roll journalled in fixed bearings, a frame journalled

page_text: upon the shaft of said roll, a check box secured to said frame above the said
roll, a lower roll mounted in bearings in the frame and rotating in contact with the
upper roll, mechanism for rotating the said rolls, first, in one direction and then
in the opposite direction, and mechanism for oscillating intermittently the said
frame about the shaft of the upper roll as an axis, substantially as hereinbefore
described.
21. In an envelope machine, the combination with the kicker mechanism, of the
upper pressing roll journalled in fixed bearings, a frame having the check box
thereon mounted upon the shaft of the said roll, a lower roll journalled in the said
frame and driven by and rotating in contact with the upper roll, a cam secured to
and rotating with a shaft below the table of the machine, a link operatively
connecting the said cam with the frame, whereby the said frame may be oscillated
about the shaft of the fixed roll as an axis, substantially as and for the purpose
hereinbefore described.
22. In an envelope machine, the combination with the gumming mechanism, of
the feed rolls 15 and 16, the vibrating finger 45, with the means for vibrating the
same, the upper pressing roll 18, the frame 87, journalled on the shaft of the said
roll, and having the check box 21, secured thereto, the lower roll 17, journalled in
the frame, means for vibrating the frame toward and away from the feed rolls to
cause the flap, first to enter the check box as it is raised by the finger, second, to
fold the body of the blank under said flap, causing the fold to enter between the
pressing rolls through which the said flap is drawn, and means for giving an
oscillatory motion to the pressing rolls whereby the blank is first drawn through
the rolls to secure the eud flap to the gummed side flaps and then passed downwardly
and a set of rolls below the table to receive the blank and deliver the same to the
point desired, substantially as hereinbefore described.
23. In an envelope machine, the combination with the fixed roll 18, having a
pinion 23 on the outer end, a movable roll 17, mounted on a frame journalled on
the shaft of the said fixed roll, and receiving its motion of rotation from the latter,
a quadrant rack with which the said pinion meshes and mounted upon the frame of
the machine, and means for vibrating the said rack to give a motion of rotation to
the said rolls first in one direction, then in the reverse direction, substantially as
and for the purpose herein before described.
24. In an envelope machine, the combination with the pressing roll 18, having a
pinion 23, on its end, the frame mouted upon the shaft of the said roll, the lower
roll, 17, journalled in the said frame, mechanism for vibrating the said frame about
the shaft of the roll 16, as an axis, the quadrant 24, meshing with the pinion 23,
a rotating shaft of the machine, and an eccentric on the said shaft connected to the
quadrant rack for vibrating the same, substantially as hereinbefore described.
Dated this 25th day of June 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.