US1381090A

US1381090A - furman

Info

Publication number: US1381090A
Authority: US
Publication date: 1921-06-07
Anticipated expiration: 1938-06-07

Description

S. FURMAN,

MACHINE FOR MAKiNG WINDOW EN'VELOPS.

APPLICATION FILED AUG,24 1917.

Patented June 7 1921.

5 SHEE SHEET 1.

In vcni'oi Eamuel Fun-man. By PM 9% fzffovneyfl S. FURMAN.

MACHINE FOR MAKING WINDOWIENVELOPS.

APPLICATION HLED AUG24, i917.

Patented June 7, 1921.

5 SHEETS-SHEET 2.

MON

Invcn fov Samuel Fuvman.

flfi ys S.-FURMAN.

MACHINE FOR MAKING WINDOW ENVELOPS.

APPLICAHON HLED AUG124, I917.

Patent ecl June 7, 1921.

5 SHEETS-SHEET 3.

S. FURMAN.

MACHINE FOR MAKING wmnow ENVELOPVS.

- Patanted June 751921;

' swans-sums.

memo FILED man. 1911. 1,381,090,.

Inveni'ov Samuel Fun-man UNITED STATES PATENT OFFICE.

SAMUEL FURMAN, or WORCESTER,MASSACHUSETTS, ASSIGNOR To UNITED STATES ENVELOPE COMPANY, or srninerrnnn, MASSACHUSETTS, A CORPORATION OF MAINE.

Continuation of application Serial No.

To all whom it may concern: I Be it known that I, SAMUEL FURMAN, a citizen of he United States, residing at lVorcester, in the county of \Vorcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Machines for Making Window-Envelope, of which the following, together with the accompanying drawings, is a specification.

The present invention relates to improvements in a machine for making window envelops, this application being a continuation of my copending application Serial No. 15,506, filed August 14, 1915. The machine of the present invention contemplates the provision of mechanism for feeding initially cut window envelop blanks into and through the machine, suitable inst-rumentalities being provided for first cutting a window opening in the blank, then gumming around the margin of said window opening and along that edge of the blank which constitutes the back flap of the envelop. Thereafter, the machlne applies a patch or panel of transparent material to the gummed window opening to cover the same, after which the end flaps of the blank are folded inwardly, and the back flap, already gummed, is folded down over said end flaps to com-. plots the pocket or inclosure. In its further progress through the machine the extended seal flap of the envelop thus partly formed, is gummed along its free edge, and thereafter said seal flap is creased or turned over toward the back of the envelop, but is prevented from making contact therewith.

The invention resides in the provision of a novel combination of instrumentalities for accomplishing the foregoing objects, as well as additional mechanism for automatically rendering inoperative the seal flap gumming mechanism when no blank is forwarded thereto. The novel features of my invention are fully set forth in the following description and in the annexed claims, reference being had to the, accompanying drawings, in which Figure 1 is a side elevation of the achinc embodying my inventions. V

Fig. 2 is a top plan view of the same, with parts removed.

Fig. 8 is a longitudinal sectional 'iew of the machine.

Fig. 1 is an end view looking from the right in Figs. 1, 2 and 3, and omitting, for

MACHINE FOR MAKING WINDOW-ENVELOPS.

Specification of Letters Patent. Patent d J n 7 19 45,506, filed August 14, 1915. This application filed August 24, 1917.' Serial No. 187,980.

the sake of clearness, the seal flap gumming mechanism.

Fig. 0 1s a detail View of the mechanism for rendering lnoperatlve the seal flap gumming mechanlsm; 1 7

Fig. 6 1s a cross sectional View of a portion of the folding mechanism.

r F g. 7 1s a fragmentary planview of the folding; mechanism.

big. 8 is a sect onal View on the line 88, of Fl'g. 7,

F g. 915 a fragmentary sectional view on the line 9=-9, of Fig. '7.

Fig. 10 1s a detail view of the seal flap gumming mechanism.

Sim lar reference characters refer to like parts in the difierent figures.

Referring particularly to Figs. 1, 2 and 3,=

the mechanisms constituting my invention are carried by frames 1, 1, and auxiliary superposed

frames

2, 2. A main driving shaft 3 is journaled in these frames, and carries a driving pulley or other actuating means, shown'at 3, for transmitting power to the sei 'eral'mechanisms. g

The envelop blanks are fed forward in the machine by means of an initial feeding mechanism which advances them successively to the point in the machine Where they are punctured to form awinolow opening; This initial feeding mechanism may be of anv well known construction, and in the present instance Lhave shown the same as consisting of a plurality of feeding disks 4, 4:, carried on shaft5, said disks cooperating with disks 6,- 6, on a. shaft 7. The shafts 5 and 7 are geared together to. rotate in unison, and are driven by suitable gearing, not shown, from the maindriving shaft 3.

In advance. of the feeding disks 1 and 6 aredisposed upper and

lower feed rolls

8 and 9 which are carried on shafts 10 and 11 respectively, and which feed the blank, as shown by the broken lines 12,,Fig. 2, onto skeleton support 13. Below said support, and near the outer edges of the blank, as shown inFig. 2, are provided a pair of laterally spaced, disks 14, 1 1, carried on a shaft 15. Said disks 1% each have a segmental portion 16 of the periphery cut away, as shown in Figs. 1 and 3, and the shaft 15 is so timed with respect to the advance of the blank thatthese cut away por ions 1.6 are brought uppermost beneath the blank, as the latter arrives on the support 13. For cooperation with the disks 14 I provide a corresponding pair of suitably journaled rolls 17, which are designed to make rolling contact with the unrecessed peripheries of disks 1 1, but which are inoperative when the cut away portions 16 thereof pass beneath the blank. As a consequence each blank upon its arrival on the support 13, has its forward motion arrested during the passage therebeneath of the cut away portions 16 of the disks 14; after this momentary stoppage, due to the stops 32, hereinafter described, the advance of the blank is continued by the cooperation of disks 1% with rolls 1?. The shaft 15 is continuously rotated by suitable gearing, Fig. 2, from the main driving shaft 3.

During the stoppage of the blank on support 13, a. window is cut therein, as shown in Fig. 2. To this end, the shaft 15 is inclosed loosely within an elongated slot 18 in a sliding block 19, the lower end of which is guided ina bracket 20 of frame 1. The block 19 may be further guided by means of adjustably mounted rollers 21, which bear against opposite sides of an extension 22 of said block, in order to insure the parallel reciprocation of the same. The block 19 is reciprocated by means of a pair of cams 23 and 2% on shaft 15, one cam 23 cooperating with a roller 25 to lower the block, and the other cam 2d coiiperating with roller 26 to raise the block.

The block 19 carries on its upper end a male die or punch 27. For cooperation with the male die 27, the machine provides a female die 28, disposed above the blank in a stationary support 29, the latter being open asat 30, for the passage of the waste paper resulting from the punching operation of the die 2'7, at each reciprocation of block 19. Thus each blank brought to rest oh the support 13 has a window opening out therein, as shown by the full line 31, Fig. 2.

In order to register each blank in exact position for the cutting of this window opening, 1 preferably provide a pair of oscillating stops 32 which may conveniently take the form of inwardly and downwardly bent bars or wires 33, adjustably secured in sockets 34 on a rock shaft 35; the latter is oscillated by means of a rock arm 36, pivotally connected to a forked link 3?, the other end of which embraces and is guided by the shaft 15. Said link 37 carries a roller 38 for cooperation with a cam 39 on shaft 15. As the blank is moved onto the support 13 by the feed rolls 8 and 9, the stops 32 are depressed so as to lie in the path of its advancing edge, being arranged for reception in the reentrant angles which define the line of fold of the back flap. as shown in Fig. 2. After the window opening is cut, as above described, and just before the disks ll and rollers 1'? become effective in continuing the forward movement of the blank, the stops 32 are raised out of the path of the blank by the oscillation of rock shaft 35, under the influence of cam 39.

The disks l4 and roller 17 then advance the blank into the bight of cooperating pairs of feed disks 1-0 and'el which are suitably driven by gearing, Fig. 2, from the main driving shaft 3. In advance of said feed roller the machine provides a cylinder 42, which is mounted on a rotating shaft 413 below the blank, and driven by suitable gear ing from the main shaft This cylinder 1-2 cooperates with a p: 'r of upper feed disks 4% for continuing the forward movement of the blank, said disks being soaced apart laterally in substantial alinement with the disks 11 so as to make contact with the blank beyond the limits of the back flap and beyond the limits of the window opening. The disks n are mounted on a shaft 45 which is geared to rotate in unison with, and at the same speed as the shaft 13.

Said shaft do has secured thereto a gumming segment $16 which carries an angular gumming die -17 co responding in contour to the edge of the back flap and an annular gumming die 1E8 corresponding in contour to the margin of the window opening in the blank. A gumtransferring roller +19 of usual construction is disposed in the path of the gu-mniing dies 4:7 and 13, and is adapted to apply, at each revolution of shaft coating of gum thereto. The roller as is in continuous contact with a gumming cylinder 50 which rotates partially submerged in a gum box 51 carrying a supply of liquid adhesive. In this way the edge of the back flap, and the margin of the window opening in each blank are supplied with moist adhesive during the passage of the blank through the machine, without arresting ll'S forward movement. The cylinder 42 cffectually supports the blank during this gumining operation.

The advance of the gummed and cut blank is continued by the cylinder and coopcrating disks er, and also by pairs of feed rollers 52, which are suit-ably spaced apart laterally so as not to make contact with the gummed portions of the blanks surface. These rollers as well as the rollers 10 and 41 are supplemented, if necessary, by suitable guiding devices 53 and 54;, on oppoposite sides of the blank, which prevent sag ging or deflection of the extended surfaces or flaps thereof, in the manner common in machines of this class. The rollers 52 project each blank successively onto a stationary tabl or support with. the advancing end of back flap of the blank overlying a plate or member 57, as shown in Fig. 2. Each blank is brought to rest on said table by means of a nair of stops 56 which are laterally spaced apart to correspond to thereentrant angles of the advancing edge wnich angles define the line of fold of the back flap. These stops 56 project r'earwardly from the member 57 which is carried by a rock shaft 58. The rock shaft 58-is actuated through a rock arm 59, which is pivotally connectedto a forked link 60, the other end of which embraces and is guided by a continuously rotating shaft 61, hereinafter more particularly referred to. This shaft (Bl, which is driven by suitable gearing from the main driving shaft 3, carries a cam 62 which operates against a roller 63 on the forked link 60, to rock the shaft 58 at appropriate intervals. The above described mechanism is timed so as to interpose the stops in the path of the blank, just as the latter arrives on the table 55, thereby effectually registering said blank in proper position for. the application of apatch thereto, and for the operations of folding the side and back flaps thereof, as hereinafter de scribed.

For the purpose of exact registration, to prevent the rebound of the blank aft-er impact with the stops 56, I provlde a pair of spaced arms 6 1, 64, journaled on a rock shaft 65, and constrained to move with said shaft by means of attached springs 6-1, 64, Fig. 5. he arms 64 are normally in the position shown in Fig. 6, until a blank has passed onto table 55. As soon as a blank arrives on sa l table, and strikes against the stops 56, the shaft 65 is rocked, to carry the arms or from the position shown in Fig. 6 to the position shown in Fig. 3, where, the upper ends of said arms enter slots 55, and are brought to rest by their adjustable stops 65, approximately within the recntrant angles on the rear edge of. the blank, which angles define the line of fold of the seal flap.

The rotation of shaft 65 continues, for a pur# pose hereinafter described, the springs 64 permitting this movement-{and pins 64: on said shaft serving to return the arms, on the reverse oscillation of the shaft. The shaft (35 has secured thereto a rocking arm 66 which is pivotally connected to a forked link 67. The free end of the latter embraces and is guided by a shaft 68 which is rotated continuously through suitably timed gearing, Fig. 2, from the main driving shaft 3, said shaft 68 having a cam 69 thereon which cooperates with a roller 70 on link 67 to impart suitably timed oscillations to the shaft 65. In this way the blank is registered and squared by the conjoint operations of stops 56 and arms 64 in position for the application of a transparent patch thereto. The patch material is fed from a suitable supply roll 71 which is carried on a spindle 7 2. The material is advanced between feed rolls 73 and 7 l, which operate intermittently, in condevices 47 and as heretofore referredto.

junctionwith cutting devices 75 and 7 6 to produce patches of predetermined length, for application to successive blanks;

The mechanism herein shown for intermittently feeding the patch material and for cutting the same between the stationary member 75 and the reciprocating member 76, is substantially the same as the corresponding mechanism shown in my United States LettersPatent No. 1,182,364, granted May 9, 1916;, said mechanism by itself forms no part of the present invention, and-therefore a detail description thereof is unnecessary. It is to be understood thatany suitable patch cutting and feeding devices be employed in thisconnection.

The patches thus fed forward and cut off are deposited on a pair of arms 77, projecting from a rock shaft 78. Said rock shaft has an operating rock arm 79, which is pivotally connected to a forked link 80, the latter at its free end embracing and being guided] by the shaft 4-5 which carries the gumming Said shaft l5-carries a cam 81 which cooperates with a roller 82 on link 80 to impart the desired oscillations to rock shaft 78, whereby thearms 77 are held in horizontal position, to receive a transparent patch from the patch feeding and cutting devices, and to hold said patch in the path of a vertically reciprocating member 83. The movable member 76 of the patch cutting mechanism above described is operable by a link Set and arm 85, said link being pivotally attached to a lever 86, pivotedat 87, and having a cam roller 88' for cooperation with a cam 89 as shown in Fig. 1;

The member 83 is reciprocated in a fixed guide 90 by means of a swinging lever 91 which is pivoted at 92 in the frame-work 2 on shaft 68,

and'has link connection 93 with said mem-' her. A forked arm 94 is pivotally connected to the swinging lever 91, and its other end embraces and is guided by the shaft 68, said arm carrying a cam roll 95 which cooperates with a cam 96 on said shaft (38. Themember 83 is hollow, and provides on its lower operating face 97, Figs. 1 and 4t, a

plurality of apertures 98, conmiunicating with its interior. The interiorof said me1nber 83 is connected by a flexible connection 99 with a suitable exhaust apparatus, not shown, by means of which a partial vacuum -may be created at will through said member.

face 97 of member 83 The patch is thus transferred from the arms 77, on which it has rested by gravity,'to'the under face of the member 83, against which is held by suction, and the further descent of said member carries said patch downward into contact and registration with the window opening of the envelop blank which has come to rest on the table 55.

As the member 83 carries the patch into contact with the gummed margin of the window opening in the blank, the suction through said member and its flexible connection 99 may be released, and if desired, a pressure of air in the opposite direction through said member may be created by the pump or other exhaust apparatus, above referred to, but not shown. At the same time, coincident with the approach of the patch into contact with the blank, the removal of said patch from the reciprocating member 83 is insured by the stripping action of a creasing and forming p etc 100 which is carried on arms 101 attached to a reel: shaft 102. The rock shaft 102 has an operating arm 103 which pivotally connected by means of a link 10-1 to a lever 105. pivoted at 106 to the framework 1. A cam roll 10? on lever 105 is acted upon by a cam 108 on shaft 3 to rock the shaft 102 at appropriate intervas, whereby the plate 100 is moved from the position shownin 6, to the position shown in 1 and 3, substantially coincident with the approach of a patch toward the window open ing of a blank on the table 55.

The plate 100 is skeleton in formation required that said plate shall exert a suffe.

cient pressure to firmly apply the patch to the blank, since this pressing function is taken care of by other parts, as hereinafter described. .211; the same time, the arrangement of parts may, if desired, be such that the free edge of said plate 100 cooperates with the adjacent free edge of member 57, to impart an initial crease along the line of fold between the bacl: flap of the body portion of the blank. That is, soon after the plate 100 is lowered, the member 57, over which the back flap extends, is raised, and thereby partially turns up said back flap. This action between the adjacent edges of the plate 100 and member 57 accomplishes an initial creasing of the blank along the line of fold between the back flap and the body portion of the blank, but it is to be understood that such action is not essential to the operation of my machine, since means are provided as hereinafter described, for completely creasing and folding said back fiap at a single operation.

The plate 100 may also be designed to impart an initial crease along the line of fold between the seal flap and the body of the blank. To this end the rearward portion of table 55 has a movable section 110, the same being vertically slidable between

integral depending walls

111 and 112 of said table. ihe movable section 110 has depending therefrom at each end a yoke 113, which embraces and is guided by the rock shaft 65. The latter carries cams 11%, which, after the arms 6% have been moved into operative position as above described, act on rollers 115 of said yokes to raise and lower the movable section 110 toward and away from the plate 100. Said plate 100 hasa projecting transverse spur or edge 116 which coincides with the line of fold of the seal flap when said plate 100 is in its horizontal position. A corresponding transverse notch 117 in the movable section 110 cooperates with the spur 116 to impart an initial crease or score along said line of fold of the seal flap when said movable section 18 raised by cams 114 as above described.

This initial creasing of the seal flap takes p ace substantially coincident with the folding in of the side flaps of the blank, after e patch has been applied to the gummed in the member 57 and stops 56 have been rocked upwardly into the position shown in Fig. The plate 100, in its horizontal position tends to press the body portion of the blank down-into contact with the table 55, and the side edges of said plate, which correspond to the lines of fold of the side flaps, act as formers over which said side flaps are folded, as hereinafter described. In this forming position of the plate 100 the side flaps of the blank are deflected slightly upward, because of the interposed thickness of adjacent side fiap folding plates 118 118, Figs. 7 and 8, which are slidable in and out on the surface of table 55, and normally lie beyond the lateral edges of plate 100. In the section shown in Figs. 7 and 8, the blank is designated at 119, the rectangular body portion of the same being shown as pressed down firmly upon table 55 by the platelOO, while the side flaps thereof project outwardly over the plates 118.

The plates 118 have depending extensions 120 which project through transversely elongated slots 121 in table 55. Each extension 120 has a vertically elongated slot 122 to receive the trunnion 123 of a pair of rolls argin of the window opening, and after nion 123 is pressed toward the top of slot 122 by a compression spring 125 which permits relative movement between the rolls 124 and their plate 118, and thus allows said plate su'liicient play to pass over the adjacent of plate 100, in the act of folding in the side flap of the blanln To this end the side edges of the plate 100 may with advantage be beveled off, as shown at 126, Fig. 8, and the adjacent edges of plates 118 may be undercut, as shown at 127. The plates 118 are moved in and out, to accomplish this foloing action by means of

levers

128, 128, which have pin and slot connece tions 129, 129, with the lower ends of extensions 126. Said levers 128 extend rearwardly of the machine and are pivoted at 1.30, 130, to the framework 2 on opposite sides thereof, the rear ends of said

levers carrying rolls

131, 131, which are acted upon by

face cams

132, 132, on shaft 43, hereinbefore referred to. In this fashion the plates 118 are simultaneously moved inwardly toward each other tofold the side flaps of successive blanks over the adjacent edges of forming plate 100, and are then withdrawn to permit the action of the back fiap folding mechanism.

The back flap folding mechanism is incorporated with a rotary carrying mechanism which, simultaneously with the folding of the back flap over the inturned side flaps, removes the partially completed envelop from the table and advances it to the mechanisms for gumming and folding the seal flap, as hereinafter described. To

this end the shaft 68 has secured thereto a carrying cylinder 133 with whose periphery the table 55 is substantially tangential, at the forward edge of said table, directly above the shaft 68, as shown in Figs; 3 and 6. The surface of said cylinder 133 provides a longitudinal opening 134 for the operation of a gripper folder 135 which is .secured to an oscillating shaft 136 carried by the cylinder 133 in a position eccentric to its axis. The ends of shaft 136 pass through and are journaled in the heads of the. drum or cylinder 133, one end of said shaft carrying an arm 13? which provides a roller 138 that is acted upon at a proper period of its rotation about the axis of shaft68 by a defleeting cam surface 139, thereby rocking the 137 to quickly rock said shaft 136 in a counterclockwise direction, Figs. 3 and 6. In order to accelerate this rocking movement the deflectingcam surface 139 is secured on a rocking member 140 which, c0- incident with the arrival of roller 138 in contact with surface 139, is moved quickly in the opposite direction to said roller by means of a cam 141 on a shaft 142 which is driven through suitable gearing, Fig. 2, from the main driving shaft 3. 'The cam 141 acts against a roller 143 which is carried by a forked link 144 that embraces and is guided by the shaft 142, the other end of-said link being pivotally connected at 145 to the rocking member 140. v I

This extremely rapid oscillation of the shaft 136 occursas the cylinder. 133 ap proaches th position illustrated in Fig. 3, with the result thatthe gripper folder 135 is moved quickly through the opening 134 into the position indicated in said figure.

Said gripper folder provides an angular extension 146 which strikes the under side of the back flap, as. it approaches thefposition ofFig. 3, and thereby folds said back flap over the adjacent edge of forming plate 100, at the same time pressing the inner or lower part of the gummed edge of said back flap firmly into contact wlth the in turned side flaps of the blank. The line of fold of the back flap is pinched and seized by the inner and under portion of angular extension 146, particularly by yielding friction devices l46,such as rubber cushions, acting through openings 109, in conjunction with the peripheral surface of cylinder 133, with the result that the partially folded envelop is drawn off of plate 100 by'the continued clockwise rotation of said cyl inder, the gripper folder 135 becoming increasingly. effective in pressing down the back flap as said rotation is continued. Finally, the roller 138 reaches the end of deflecting cam surface 139, whereupon the gripper folder releases "the envelop and springs back to its normal position, shown in Fig. 6, under the influenceof aspring 147, which is secured at one end to the shaft 136 and at the other end toan arm 148, through which said, shaft loosely passes and which is journaled on shaft 68. c

i The partly foldedv envelop thus carried downwardly by the rotation of cylinder 133 is acted upon by a pressing plate 149 of cylindrical contour, which is secured" to a cylinder 150, carried by the shaft 61 herein- ,before referred to. The cylinder 150 is of such a diameter as to have its. periphery spaced from the periphery, of cylinder 133 to allow the passageof the gripper folder 135 on thelatter cylinder, but the pressing plate '149 rolls in substantial contact with the cylinder 133, and thereby firmly unites the folded back flap to the in-- turnedside or end flaps, thus completing the rear wall of the envelop, and at the same time firmly unitin the transparent patch to the front wall. aid pressing plate 149 is preferably of such a shape that when developed in a single plane it corresponds approximately to the edge of the backflap of the blank, andsaidfplate is so propertioned that its pressure on the back flap cease-S j Sher; of heedge t reef in rder not to cause the moist gum to exude past said edge.

The cylinder 150 provides an opening 151 in its periphery toward which project a pair of spaced radial arms 152 secured to the shaft 61. These arms 152 are slotted at their outer ends to receive the stem 153 of a seal flap gumming member 154, said stem being radially movable in said slots. To this purpose saidgumming memberhas rollers 155 mounted on trunnions 156 at each end, said rollers being pressed inwardly by springs 156', Fig. 2, into contact with the peripheries of a pair of similar cams 157, which are loosely journaled on the shaft 61, as shown in Fig. 10.

In the normal operation of the machine, the gumming member 154, as rotated by the shaft 61, receives a coating of gum from a transfer roller 158, the latter being continuously supplied from a gumming roller 159 submerged in a gum box 160 of usual construction. In normal position shown in Fig. 10, the contour of cams 157 is such that the gumming member 154 after being extended to make contact with transfer roller 158, as shown, then is crawn inward to lie approximately even and flush with pressing plate 149, and in this position said gumming member lays a coating of gum along the edge of the seal flap of an envelop in transit between

cylinders

133 and 150. In this manner the seal flap of each partly finished envelop is gummed, immediately after the pressing action of the plate 149, and thereupon each envelop, being released by the gripper folder 135, passes by gravity, or otherwise, into the bight of feed rollers 161 which advance it to the seal flap folding mechanism, as hereinafter set forth.

It sometimes occurs, however, that, due to a momentary cessation in feeding the blanks, or to any other cause, there is no partly formed envelop passing between the

cylinders

133 and 150 when the gumming member 154 reaches its operative position, as above described. Under these circumstances the normal operation of said gumming member would carry it into contact with the surface of cylinder 133, with the result that the succeeding envelops passing through the machine would be soiled and would adhere to the surface of said cylinder, necessitating the stoppage and cleaning of the machine. To avoid this result, the cams 157 are pivotally connected as at 162 to a link 163 which is'operated by an arm 164; extending from a rock shaft 165. Said rock shaft is adapted to be actuated by an arm 166, on the end of which is secured a laterally projecting stud 167, Fig. 5, having loosely mountedthereon for sliding movement a wheel 168. Said wheel is yieldingly pressed against a stop 169 at the outer end of said stud by means of a compression spring 170,

and in this position said wheel is out of the pat-h of a cam 171, which is secured on a shaft 1 2 that IS continuously driven by suitable gearing, Fig. 2, from the main drivpins or fingers 173, when the movable section 110- is moved upwardly by the action of oscillating cam 114. IThese fingers 173 are carried by a block 174, which is supported on the end of a lever 175, pivoted at 176 to a bracket 177 depending from the table 55. The other end of lever 175 is pivotally connected at 178 to a pitman 179 which has a beveled lower end 180 in close proximity to the beveled edge of wheel 168.

The pitman 179 is suitably guided for parallel reciprocation by a pin and slot connection with a bracket 181, and is urged down wardly, Fig. 5, by a spring 182 of greater strength than the spring 170 which holds the wheel 168 away from cam 171. However, the spring 182 is not suiiiciently strong to depress the pit-man when there is a blank on the table 55, since the upper ends of pins 173 will be obstructed by the presence of a blank, and hence the pitman will remain in the position shown in Fig. 5. 0n the other cam 171 is brought into play to rock the shaft 165, and thereby through the arm 164 and link 163 to rotate the cams 157 so that the gumming member 151 controlled by said cams will be drawn inwardly when opposite the cylinder 133, by low portions 157 of the cams, and will have its subsequent out ward movement advanced to a point in its travel where it is not directly opposite the cylinder 158. In this manner, the smearing of gum on the cylinder 133 is effectually prevented.

The feed rollers 161 are suitably groovel and arranged to avoid contact with the moist gum on the seal flap as the nearly completed envelops pass therebetween and fall by gravity into a V-shaped receptacle constituted by a stationary wall 183 and a swinging wall 18%, which is carried on a rock shaft 100, supported by the framework, The envelops drop into this ii-shaped receptacle, with their folded lower ends foremost, and with their gummed seal flaps proj ecting past the upper edgeof wall 184. As each envelop is thus received, the wall 1841 is rocked inwardly from the position shown in Fig. 1 to the position shown in Fig. 3, by means of an arm 186 connected to rock shaft 185 and operated by a forked link 187 which emb aces and is guided by the shaft 172. Said shaft 172 carries a cam 188 which acts on a roller 189 of the link 187 to rock the shaft 185, and thus brings the extended seal flap of the envelop adjacent to the periphery of a cylinder 190 carried by the shaft 172.

T he cylinder 190 constitutes a convey ing mechanism for delivering the envelop from the V-shaped receptacle above described to a drying chain 191 of usual construction, or to any other mechanism of this class for handling the completed'envelops, and said cylinder 190 combines with its con veying function, the function of finally turning over or folding the gunimed seal flap of the envelop, which preferably has had an initial crease along its line of fold while resting on table 55. To this end the cylinder 190 has a longitudinal op'ening192, for the operation therethrough of a gripper folder 193, carried on an oscillating shaft 194 which is supported at its ends by the cylinder 190 in an eccentric position to the shaft 172, and operated in precisely the same manner as the shaft-136 of gripper folder 135. That is to say, the shaft 19 1 has an arm 195, F ig. 3, which carries a roller 196 that bears on a deflecting cam surface 197,

similar to the deflecting cam surface 139' above referred to. Said defiecting cam surface 197 is oscillated in the direction opposite to the rotation of cylinder 190 by means of a forked link 198, Figs. 1 and 4:, which embraces and is guided by the shaft 142, the latter having a cam 199 which cooperates with a roller 200 on link 198 to impart the proper movement to deflecting cam surface 197 i In this way the requisite quick action of gripper folder 193 is obtained, similar to the action ofgripper folder 135, whereby the extended seal flap of an envelop, held against the periphery of cylinder 190 by the swinging wall 184:, is struck backward by the gripper folder 193, and folded over the edge of said wall 184, during the rotation of cylinder 190. The gripper folder 193 is shaped so as to pinch and seize the envelop only along the line of fold of the seal flap, without pressing the same into contact with the back wall of the envelop and the envelop so pinched and seized is carried around by the rotation of the cylinder 190 until the gripper folder releases: the same and swingsback into normal position under the influence of a spring 201, Fig. 4-,- This carries the envelop between the cylinder 190 and a pair'of cooperatingfeed rolls or cylinders 202 which are carried on ashaft 203 that is rotated continuously by suitable gearing from the main driving shaft 3. The cylinder 202 is cut away, as shown at 204, so as to avoid pressing the seal flapinto contact with the back wall of the envelop. The

cylinders

190 and 202 cooperate in forwarding the completedei'ivelops to the drying chain 191, or other equivalent device, where the seal flap gum is thoroughly dried before the envelops are stacked and boxed. The operation of my improved machine will be clear from the detailed de cription of its component parts and functions. It will be clearly understood that in the several insti'unientalitieswhich depend upon cams a d cam rollers for their action, the cam rollers are held against the cams by springs, or other equivalent devices, which are not herein shown in detail, in order not to'coinplicate unnecessarily the drawings; ft-will also be understood that my invention is not confined in any way to the specific mechanism employed for accomplishing; the various functionsof the machine, but is entitled to a fair range of equivalents within the terms of the annexed claims.

' More specifically referring tothe operation of the folding devices above described, it is to be understood that the forming plate 100 does not firmly grip or bite the blank when in its horizontal position so as 110 of table 55 has started to 'move down,

so that there is no pinching or gripping; of the envelop between said movable s "ion and the plate 100. in this way the r tion of the gripper folder 135 is greatly facilitated i being c ear tl at the resilient cushions 14-16, acting through the open ngs 109 in the edge of slate 100, can firmly seize and press the folded edge of the partly formed envelop into "ripping contact with the perig'iheryof ca nqcylinder 133.

I claim,

1. A machine forinakins window cnveh patch of transparent paper to said, blank on said support, a stripping: plate adapted to strip said patch from said suction member and to deposit said patch on said bl? v pa r of folding'plates adapted find, the

side flaps of the blank over said stripping plate, and means for actuating said suction member, said stripping plate and said folding plates. 7

2. A machine for making envelops, comprising a support for the body of an envelop blank, said support having an opening therein, a lower creasing plate adapted to pass through said opening under part of said blank, an upper creasing plate adapted to clamp the body of said blank on said support, a projection carried by one of said creasing plates, and a notch in the other creasing plate, whereby the cooperation of said plates effects the creasing of the seal flap of the blank, a pair of folding plates adapted to fold the side flaps of the blank over said upper creasing plate, and means for operating said creasing plates and said folding plates.

3. A machine for making envelops, comprising a support for the body of an envelop blank, a movable plate in advance of said support and adapted to receive on its upper surface the back flap of the blank, an upper creasing plate adapted to clamp the body of the blank on said support, a lower creasing plate adapted to pass through an opening in said support under part of said blank, the cooperating edges of said movable plate and said upper creasing plate being adapted to crease the said back flap therebetween, and the cooperating faces of said upper and lower creasing plates being adapted to crease the seal flap of the blank therebetween, a pair of suitable folding plates adapted to fold the side flaps of the blank over said upper creasing plate, and means for actuating said creasing plates and said folding plates.

4. In a machine for making envelops, a support for an envelop blank, a plate in advance of said support and adapted to receive on its upper surface he back flap of the blank, an upper creasing plate adapted to act as a clamp for the blank on said support, the cooperating edges of said plates being adapted to crease the back flap therebetween, and a mechanism for folding said back flap adapted to cooperate with said support to engage a blank thereon and fold the same, and means for moving said first mentioned plate out of the path of said back flap folding mechanism during the operation of folding said back flap.

5. In a machine for making window envelops, means for feeding envelop blanks through the machine. a support for said blanks, a patch applying mechanism adapted to apply patches of transparent paper to successive blanks on said support. means for registering said blanks with said patch applying mechanism, said registering means including a pair of frontal stops adapted to arrest the forward motion of said blanks,

and means for creasing the back flaps of the blanks, said creasing means including a movable plate in advance of said Support and said frontal stops being mounted on said creasing plate.

6. In a machine for making envelops, a support for envelop blanks, an oscillating plate in advance of said support and adapted to receive on its upper surface the back flaps of said blank, an upper creasing plate cooperating with said support and adapted to clamp said blanks thereon, the cooperating edges of said plates being adapted to crease the said back flaps therebetween, preliminary to their being folded, and a mechanism for folding said back flaps adapted to cooperate with said support to engage a blank thereon and fold the same, said oscillating plate being movcble out of the path of said back flap folding mechanism during the operation of folding said back flaps.

7. In a machine for making envelops, a

mechanism for folding the back flaps of the envelop blanks, comprising a support for said blanks, a suitable clamp adapted to hold said blanks on said support, a rotary carrier, a gripper folder mounted on said rotary carrier, said gripper folder being adapted to seize and fold said back flaps over said clamp on said support, thereby also closing the same, and to remove the folded blanks from said clamp and off said support, and means for actuating said clamp and said gripper folder.

8. In a machine for making window envelops, means for conveying a transparent patch to an envelop blank, to cover a win dow opening therein, an oscillating member for stripping said patch from said conveying means, and folding devices, cooperating with said oscillating member, for folding the flaps of the blank.

9. In a machine for making envelops, a Support for an envelop blank, a movable plate in advance of said support, over which the back flap of the blank projects, a member movable into contact with the upper surface of the blank on said support, and cooperating with said support to crease the seal flap of said blank, and with said movable plate to crease the back flap of said blank.

10. In a machine formaking envelops, a support for an envelop blank, a movable plate in advance of said support, over which the back flap of the blank projects, a member movable into contact with the upper surface of the blank-on said support, and cooperating with said supportto crease the seal flap of said blank, and with said movable plate to crease the back flap of said blank, and means cooperating with said member for holding the side flaps of said blank.

11..In amachine for making'envelops,

rneans for stationarily supporting an envvelop blank, with ia-flap thereof overhang- 1 ing" said supporting means, a rotating carthe rotation thereof, forfolding back said movable into contactwith the upper surface flap, and for cooperation with said carrier" to seize the edge of'the blank'thus folded, v I v I n p v ,into'contactiwithsaid disengagement cam in and to remove said blank from said support. 12.' In, va machine for making envelops;

means for .stationarily' supporting an envelopblank, with a flap thereof overhanging said supporting. means, a rotating carrier ad acent said overhanging flap,v a member:

of a blank on said support, and oscillating means 'on said carrier, operablelduring the rotationthereOf, for cooperation with said member to fold said overhangingflap. a 13. In a machine for making envelops,

,means for stationarily supporting an en vvelop blank, with-a flap thereo'foverhanging said supporting means, a rotating vcarrier ZLClJiLCGIlt-I said overhanging. 'flap, a member s-movable into contact withth e upper surface of a blank 0nsaid support, and oscillating means on said carrier, operable during the: rotation thereof, for: cooperation with said member to foldsaid overhanging flap, and, for cooperation with, said carrier,.to seize h the edge of the blankthus foldedand to re;- 7

move said blank from'said support;

14. I11 a machine for making window en-I I u e I i imechamsmfor"'foldingfthe seal 'flaps of seal flap gummer. connected tosaidradiallyir fixed axis of rotation, a radiallyadjustable movable arms at the'outerends thereof, r011-. ers on said gummer, and a guiding cam loosely fitting onsaid shaft and adapted to suitably guide said rollers on said, gummer, thereby bringing saidgummer into contact; with, the seal, flaps of said blanks on said carrier, combined with a mechanismadapted to automatically turn ,said guiding-cam on said shaft into a., position whereby it will;

guide said rollers" to bring sai'dgummer out ofcontact with said carrier in the absence of a blank thereon; y p 15. In a machine formaking window envelops, a mechanism for gumming'theseal" flaps of the envelop blanks, comprising a carrier for said blanks, a shaft having a rotary'gummer connected thereto, rollers on said gummer, a guiding cam loosely fitting on said shaft and adapted to control the motion ofsaid gummer by means of said rollers 1- Cam-0n saidshaft, and a mechanism for automatically controlling the position of said guiding cam on saidshaft, said mechanism comprismg" a rotary d sengagement cam, a roller .operatlvely connected to sa1d gulding cam, said roller being normally-out of contact with said disengagement cam and adapted tobe brought into Contact therewith, and automatic means for bringing said roller the absence ofa blank on said carrier, theremechanism for gumming the seal fiaps of part1y mad 'envelops, a seal flap folding mechanism and a means for transmitting said partly made jenvelops from said gumming mechanism to said; folding mechanism,

' said seal flap folding mechanism comprisnga rotary carrler for said partly made en by changing theposition'of said guiding 1 l cam on'said shaft. i

velops, algrippe'r folder mountedon said carrierfjsaid gripper folder being adapted Ltoseiz'e the partly made envelop and fold the a seal flap; thereof against "said carrier, without closing said flap, and said transmitting means including stationary support for said partly madeienvelops, to rest edgewise thereon, said'support beingzarrange'd adjacent to [said folding mechanism, and a memher adapted-to"cooperate; with said support to bring the partly fmade envelop within reach of said seal flap folding mechanism. 7

'17, In a machinefor making envelope, a

on said carrier, a movable, plate operatively amma adjacent to said carrier and adapted to bring said envelop with the open seal flap Within reach ofsaidgripper folder,ion the outside a of 3 said carrier, during I 7 a proper phase ofthe'motionof said gripper folder,

and to cooperate therewith in foldingsaid seal flap, said gripper folder being adapted said foldedenvejlop on said plate.

seal flap folding mechanism, means for actu- 11o to fold said seal flap over the edge of said plate without closing the seal flap, and said carrier, in its rotation, being adapted to a move said gripper folden'th'ereby carrying In a machine for making envelo ps, a

ating said mechanism, a support arranged adjacent to saidfolding mechanism for the partly made envelop to rest edgewis'e thereon, a suitable member for said partly made envelop s to lean againstflatwise, and a plate adapted tocooperate with said support and said member to bring the upper'part of said partly made envelop" within reach of said seal flap folding mechanism. a

19. In a-machine for making envelops, a

back flap gumming mechanism, a back flap r I folding mechanism and a seal flap gumming mechanism, combined with a cylindrical pressing plate for the back' flaps of'the en-. velop blanks, said folding mechanism including a rotary carrier for the blanks,"and, a gripper folder mounted on saidcarrier, said gripper folder being adapted tofold said back flaps, .and said pressing plate being adapted to cooperate with said carrier in pressing said back flaps therebetween.

20. In a machine for making envelops, a

back flap gumming mechanism, a back flap folding mechanism and a seal flap gumming mechanism, combined with a cyl ndrical pressing plate for the back flaps of the envelop blanks, said folding mechanlsm ncludlng a rotary carrier and a gripper folder mounted on said rotary carrier, said gripper folder being adapted to fold said back flaps, and said pressing plate being connected to said seal. fiapgumming mechanism and adapted to rotat-etherewith' andto cooperate with said c'arrier'in pressing said back flaps therebetween.

. 21. In a machine for making envelops,.the

combination with means for folding the flaps of an envelop blank, of means'for supporting said blank during the folding operations, a portion of said supporting means being movable to eiiect the creasing of one. of the flaps of the blank, and means for engaging the .rear edge of the blank on said support to register the same in ,operation of said movable portion.

22. In a machine for making envelops, the combination with means for folding the flaps of an envelop blank, of means for support- 7 ing said blank during the-folding operations,

a portion of said supporting means being .inovable to effect the creasing of one of the flaps of the blank, an actuating means for said movable portion, and registeringdevices for the. blank, yieldingly connected to said actuating means, whereby the initial movement ofsaid actuating means registers said blank.

23. In a machine for making envelops, the.

combination with means for folding the flaps of an envelop blank, of means for supporting said blank during the folding operations,

a portion of said-supporting means being,

movable to efi'ect'the creasing of one of-the advance of the creasing flaps of the blank, an actuating means for said movable portion, and means for arresting' the movement of said registering devices, substantially coincident with the op- 'eration ofsaid movable portion by said actuating means.

24. In a machine for making window envelops, a support for envelop blanks, a movable suction member adapted to apply patches of transparent paper to successive blanks on said support, and a stripping plate for said patches adapted to strip said patches off said suction member and to de-' posit said patches upon said blanks on said the same toward said blanks on said support, said stripping plate being adapted to strip said patches off said suction member and deposit said patches upon said blanks on said blank support, said patch support and said stripping plate being adapted to be turned out of the path of said suction member during its travel toward said blank support, and said stripping plate having suitable openings adapted to clear said patch support when turned out of the path of said suction member. 1 r

26. In a machine for making envelops, a cylindrical member rotating about a fixed axis and adapted to carry a blank on the surface thereof, a second member rotating about a fixed axis and providing asurface for cooperation with a flap of a blank on said first member to gum said flap," and means for automatically retracting the surface of one of said members, in the absence of a blank on said first rotating member.

gated this twenty-first day of August, f191 i SAMUEL FURMAN. IVitnesses NELLIE VVHALEN, Gno. H. KENNEDY, Jr.