US1961162A - Gumming mechanism for envelope machines - Google Patents

Description

June 5, 1934. NOVICK 1,961,162

GUMMING MECHANISM FOR ENVELOPE MACHINES Filed Deo. 5. 1950 4 Sheets-Sheet l INVENTOR Abraham-Nowak BY /Zlm' ,QAM

A TTORNEYS 5, 1930 4 Sheets-Sheet 2 INVENTQR Abra/7am /l/ov/c/f.

@ai CV- w ATTORNEYS June 5, 1934.

A. NovlcK GUMMING MEGHANISM FOR ENVELOPE MACHINES Filed Deo June 5, 1934. A- NQVICK 1,961,162

GUMMING MECHANISM FOR ENVELOPE MACHINES Filed Dec. 5, 1930 y 4 sneetsheet 's 4INVENTOR Abm/7am /Vowc/f.

.lune 5, 1934. A. NovlcK 1,961,162

GUMMING MECHANSM FOR ENVELOPE MACHINES I Filed Dec. 5, 1930 4 Sheets-Sheet 4 Illl.

l//l/l/JJ A TTORNE Y6 Patented June 5, 1934 UNITED STATES PATENT OFFICE GUMMING MECHANISM FOB ENVELOPE MACHINES Application December 5, 1930, Serial No. 500,322

'l Claims.

This invention relates to envelope making machinery, and more particularly to gumming mechanism thereof.

In mechanism of this character it is the practice to feed the envelope blanks in definitely timed relation past a gumming station and to provide at said station one or more members for transferring gum from a gum supplying element and applying it to the blanks.

It is an object of the present invention to provide in a mechanism of this character means controlled by the blanks themselves for altering the path of the gum `transferring element when a gap occurs in the series of blanks to cause the transferring elements to escape engagement both with the blank feeding mechanism and with the gum supplying element.

It is a further object of the invention to provide a gum transferring element movable continuously in a rotary path and to retract vthe active surface of such element toward the axis of rotation when a gap occursin the series of envelope blanks.

It is a further object of the invention to provide control means for the gumming mechanism comprising a feeler, so contrived that the feeler f is permitted to move into intersecting relation to the path of blank feeding only at times that a blank will normally be in a position to inter- 30 cept it in such movement.

Other objects and advantages will hereinafter appear.

In the drawings forming part of this specication:

Figure 1 is a fragmentary, plan view of an envelope machine embodying features of the invention;

Figure 2 is a fragmentary, side elevation, partly in section, and partly broken away, of the 40 mechanism illustrated in Figure 1;

Figure 3 is a detail, sectional elevation showing one of the gum applying elements in the act of gumming a blank;

Figure 4 is a detail, sectional view taken on the line 4 4 of Figure 2;

Figure 5 is a fragmentary, transverse, vertical, sectional elevation showing the gum applying members in the'act of applying gum to a blank;

Figure 6 is a detail View showing the manner of mounting and adjusting the gum applying mechanism;

Figure 'I is a sectional, detail View;

`Figure 8 is a sectional view taken on the line 8-8 of Figure 7, looking in the direction of the arrows and showing the parts assembled;

(ci. eis-ss) Figure 9 is a sectional view taken on the line 99 of Figure 5, looking in the direction of the arrows;

Figure 10 is a view generally similar to Figure 5, showing the gum applying members retracted;

Figure 11 is a detail elevation of a part of the mechanism that controls retraction of the gum applying members;

Figures 12, 13, 14 and 15 are sectional, detail views showing certain parts of the control mechanism in various relationships which they assume in operation.

The machine comprises a frame 1, a scoring mechanism 2, a side fiap folding mechanism 3, creasing rollers 3a, and gumming mechanism 4. 70 It also comprises various parts, not shown, for taking the blanks singly from a stack in definitely timed relation, feeding them forward, gumming the sealing flaps, drying the gum, and then presenting the blanks to a multiplicity of feed rollers 5 and 5a which feed the blanks in definitely spaced relation past the scoring, side nap folding, andgumming mechanisms 2, 3 andV 4. A feed roller 6 supports the blanks in direct opposition to the gum applying means, being driven through suitable bevel gears 6a and 6b. The gumming mechanism is designed to apply gum along marginal portions of the folded in side flaps 'I of a blank 8, so that when the bottom flap 9 is subsequently folded over against the side flaps, it will 85 adhere to them.

The gumming mechanism comprises a container 10a, a roll 10b running therein, and a gum supply roll 10 that runs in engagement with the roll 10b. A pair of gum transferring blades l1 are adjustably mounted on a shaft 12 by means of set screws 13. The shaft l2 is adapted for rotation to carry the gum applying members 1l succes' sively against the gum supply roll l0 and the work. The shaft 12 is constantly rotated at a 95 uniform rotary speed, but provision is made for shifting it with reference to its axis of rotation so as to draw the active surfaces of the gum applying members 11 inward toward such axis of rotation whenever it develops that an envelope blank 100 is missing in the normally evenly spaced train of blanks passing through the machine. Such shifting of the shaft causes the gum applying members 11 to escape engagement withthe gum supply roll l0 and with the work, but the arrange- 105 ment is such that the gum applying members 11 are restored after one cycle to normal condition unless it develops that two or more blanks in succession are missing. Provision is also made for adjusting the supports of shaft 12 to cause 110 the gum applying members 11, when in normal position, to coact properly with the roll 10 and the work.

Referring primarily to Figures 5 and 10, it will be observed that the shaft 12 is provided at its left hand end with a hub 14. This hub extends outward for a Vconsiderable distance transversely of the shaft and is hinged at one end thereof by means of hinge pins 15 to a gear 16. The gear 16 is provided with a bearing sleeve 17 which is journaled upon a stationary shaft 18. 'I'he sleeve 17 is held on the shaft 18 between a collar 19 formed on the shaft and a plate 20 held against an end of the shaft by a screw or bolt 21. The shaft 18 has an offset extension 22 at the left hand end thereof, this extension being cylindrical but eccentric with relation to that portion of the shaft 18 on which the gear sleeve 17 is journaled. The eccentric portion 22 of the shaft is supported by a clamping bracket 23 carried by the machine frame, and is held fixed therein by means of clamping nuts 24 and lock nuts25. The outer end of the shaft 18 is provided with a handle 26 fil whereby the shaft may be rotated when the pressure of the clamping bracket 23 is relieved to shift the axis of the shaft 18 upor down, as desired, so that the gum applying elements 11 will coact properly with the gum supply roll 10 and the work when the shaft 12 is in the normal position illustrated in Figure 5.

At the right hand end of shaft 12 provision is made of a hub portion 27 in the form of a yoke having an abutment or block 28 provided at one end of the yoke. The hub portion 27 embraces and is slidable upon a supporting block 29, being normally held with the block 28 in engagement with one end of the block 29 by tension vsprings 30 which connect the block 28 with pins 31 carried by the block 29. The block 29 carries within it a dog 32 which is pivotally supported on a pin 33 which is normally maintained in -the position illustrated in Figure 5 by reason of the normal relationship of the blocks 28 and 29 maintained by the springs 30. The dog 32 is provided with a toe portion 34 which engages an inner surface of the shaft\12 and with a heel portion 35 which engages a plunger 36. As will presently appear, the plunger 36 is adapted to be thrust toward the left, as viewed in Figure 5, against the force of a compression spring 37 to swing the dog 32 clockwise so that the gum applying surfaces of the members 11 will be carried inward by the shaft 12 toward the axis of rotation, that is to say, toward the prolongation of the axis of sleeve 17.

The block 29 includes a sleeve portion 38 in which the plunger 36 is slidable and in which the spring 37 is contained. The sleeve 38 is rotatable in a bearing sleeve 39 and is eccentrically mounted therein. The bearing sleeve is itself mounted with capacity for rotative adjustment in av cylindrical bearing 40 of a frame member 41. The sleeve 38 is provided at the right hand end thereof with a crank 42 having `an arcuate slot 43 formed therein, which slot is concentric with the axis of the sleeve 38. 'Ihe crank 42 is adapted to be held in various adjusted positions by clamping it against the machine frame by means of a clamping bolt 44 that passes through the slot 43 and is threaded into the frame. Adjustments of the eccentric supporting bearings 18 and 39 at opposite ends of the shaft are ordinarily concurrently made and adjustment of the gum applying members 11 circumferentially of the shaft 12 may be concurrently made, if it is found that the gum applying members have been substantially displaced by the bearing adiustments.

The mechanism for controlling the plunger 36 and the dog 32 comprises a rock shaft 45 that extends transversely across the machine below the path of the work, a feeler finger 46 fast on the rock shaft and forming a crank thereon, and an arm 47 which is also fast lon the rock shaft and which is provided with an abutment finger 48. The finger 48 desirably extends substantially at right angles to the plane of rotation of the arm 47. 'I'he finger 46 and the arm 47 extend in opposite directions from the rock shaft, and the arm overbalances the finger (or may be caused to do so by a spring) so that the tendency is to swing the finger 46 upward through the path of blank travel. When no blank is present, the finger 46 may move higher than the plane in which the blanks travel, but whenever a blank is present in position to be engaged by the nger the finger will be caused by the blank to come to rest in a position below but touching said plane. The finger may thus be effective to control the position of the abutment finger 48 of the arm 47.

The position of the abutment finger 48 is utilized to control the gum applying members 11. A vertical shaft 49 journaled in bearings 50 and 51 on the machine frame is provided with an upper crank 52 and a lower crank 53, both fast on the shaft. A tension spring 54 connected to a tail portion 55 of the crank 52 normally tends to pull the crank toward the left hand side of the machine, or in other words, in a clockwise direction, as viewed in Figure 4. An adjustable screw 56 carried by the crank 52 bears against the end of plunger 36 and tends to force the plunger toward the left.

The crank 52 has fixed thereon an abutment block 57 for coaction with the abutment finger 48. The crank 53 is provided with a cam follower 59 which rides upon a face cam 60 carried by a shaft 61 that is driven in unison with the gear 16. The cam 60 includes a raised portion 62 which, once in each revolution of the cam, passes beneath the cam follower 59 and rocks the shaft 49, and hence the crank 52 in a counterclockwise direction, as viewed in Figure 4. This carries the abutment block 57 clear of the abutment flnser 48,' as seen in Figures 12 and 14, so that the finger 48 is free to seek a level determined by the presence or absence of a blank in position to be engaged by the finger 46. While the cam follower 59 is in engagement with the raised portion 62 of the cam, the finger 46 comes to rest either in a position above the plane of blank feeding, if no blank is present for gaging, or in contact with the plane of blank feeding, if a blank is present for gaging. In the former case the abutment finger 48 is caused to occupy a relatively low position with relation to the abutment block 57, as illustrated in Figure 14, while in the latter case the abutment finger V48 is caused to occupy a relatively elevated position with relation to the abutment block 57, as illustrated in Figures 12 and 13. As soon as the raised portion 62 of the cam 60 passesfrom beneath the cam follower 59, the

spring 54`draws the crank 52 in a clockwise difurther 'movement of the abutment block, and

consequently of the crank 52, is prevented by the um mammalian abutment finger. When this occurs the crank 52 will be ineffective to thrust the plunger 36 farther inward than the position illustrated in Figure 5. The shaft 12 will not, therefore, be rocked above the pivot pins 15, but will remain concentric with the gear 16 and the bearing sleeve 38. During the ensuing cycle of the gum applying mechanism, therefore, the gum applying members 1l` will occupy positions like those illustrated in full and broken lines in Figure 5, and will be effective to receive gum from the gum supplying roll 10 and to apply it to the work.

After the point of the abutment finger 48 has become engaged in the notch 63, the blank which has been responsible for such engagement passes beyond the blank engaging portionof the finger 46 for gumming. This does not,however, produce any readjustment of the gum applying mechanism, since the finger 48, being caught in the notch 63, cannot drop down until the raised portion 62 of the cam 60 has again come into position totwithdraw the abutment block 57 from` engagement with the abutment finger 48.

When such withdrawal of the abutment block next occurs, .should it develop that there is no blank in position for gaglng, the abutment finger 48 will be caused to take up a position like that shown in Figure 14. Upon the next inward movement of the abutment block 5'1, the gage finger will be received in a slot 64 formed in the abutment block. The inward travel of the abutment block will not be arrested by the abutment flnger, and hence the crank 52 will be permitted to move in far enough to actuate the plunger 36 andthe ,dog 32 to shift the shaft 12 to the position illustrated in Figure 10 to render the gum transferring blades ineffective. The shaft will remain in this tilted condition to hold the gum applying members 11 retracted throughout substantially a complete revolution or until the raised portion 62 of the cam 60 again comes under the cam follower 59.

It will be remembered that the abutment finger 48 was in a relatively low position where it could enter the slot 64 because the gaging finger was in a position to extend across and above the plane of blank feeding. Since the gaging finger 46, if permitted to remain in this elevated position, might obstruct and mutilate the next oncoming blank and thereby force an interruption of the operation of the machine, provision is made for immediately restoring the gaging linger to.a position below the plane of blank feeding. To

. this end the abutmentnger 48 is provided with an inclined cam surface 65 adapted to engage an inclined cam surface 66 formed at the lower entrance portion of the slot 64 so that the abutment finger is cammed upward to a position like that seen ,in Figure 15. The finger remains in this position throughout the ensuing cycle or until the raised portion 62 of the cam 60 next becomes effective, at which time the abutment block 57 again moves outward. It will be noted that in moving upward to the position of Figure l5 the point of the abutment finger is necessarily carwish to be confined to the embodiment shown, but what I desire to cover by Letters Patent is set forth in the appended claims.

I claim:

1. In an envelope machine, in combination, a gum supplying member, a work supporting member, gum applying means adapted for rotation contiguously to both said members, a support for the gum applying mea'ns, aligned rotary shafts -carrying said support, means operable to shift said support toward and from the common axis of said rotary shafts, and means controlled by the work for controlling operation of said shifting means.

2. In -an envelope machine, in combination, a gum supplying member, a work supporting member, gum applying means adapted for rotation contiguously to both said members, a support for the gum applying means, aligned rotary shafts carrying said support, means operable to shift.

said support toward and from the common axis of said rotary shafts, and means for adjusting said rotary shafts to secure a desired normal relation of the gum applying means to the gum supplying member and the work supporting member.

3. In an envelope ma'chine, in combination, a gum supplying member, a work supporting member, gum applying means adapted for rotation contiguously to both said members, a support for the gum applying means, aligned rotary shafts carrying said support,rmeans operable to shift said support toward and from the common axis of said rotary shafts, comprising a plunger extending axially through one of said shafts and means for moving the plunger in opposite directions axially of the shaft, and means controlled by the work for controlling the operation of said plunger moving means.

4. In an envelope machine, in combination, a

gum supplying member, a work supporting member, gum applying means, a support therefor, a pair of aligned rotary shafts carrying said support, said support being transversely pivoted upon one of said shafts, and means carried by the other shaft for rocking the support about such pivot.

5. In an envelope machine, in combination,

gumming means normally operable in a path for engaging the work, means for feeding envelope blanks to the gumming means in definitely timed relation thereto, a work controlled device having an abutment, a shifting vdevice for the gumming means including an abutment adapted to be intercepted or permitted to pass by the first mentioned abutment, said first mentioned abutment being constrained to move in a path substantially at right angles to the path of the second mentioned abutment.

6. In an envelope machine, in combination, gumming means normally operable in a path for engaging the work, means for feeding envelope blanks to the gumming means in definitely timed relation thereto, a work controlled device having an abutment, a shifting device for the gumming means including an abutment adapted to be intercepted or permitted to pass by the first mentioned abutment, said abutments being constructed to interlock to maintain the work controlled device with the work engaging portion thereof normally clear. `of the work path, and

means formoving the second mentioned abutment clear of the first once in each cycle at a time when a blank s hould normally be in position to be engaged by the work engaging portion of the work controlled device.

thereof normally clear of the path of the blanks,

lmeans for positively moving the shifting device .to carry the second mentioned abutment clear of the rst once in each cycle at a time when a blank would normally be in position to be engaged by the work engaging portion of the work controlled dev ice, and means for yieldingly moving the shifting device in the reverse direction to reengage the abutments.

ABRAHAM NOVICK.

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