US1352283A - Machine for making double-wall boxes - Google Patents

Description

L. E. LA BOMBAR'D. MACHINE FOR MAKING DOUBLE WALL BOXES.

APPLICATION FILED DEC. I8 I916.

Patented Sept. 7, 1920.

' 4 SHEE'ISSHEET l.

m o o W L M mm 9 Ah vm \w m QM mw mm N be R% Q L fin Rn 9n aw mm. km s% 3 2 I Q% mm nh hm. wwmw w M Q w hm RN I, Y x 1, N MWMN .Q

L. E. LA BOMBARD.

MACHlN-E FOR MAKING DOUBLE WALL BOXES.

APPLICATION FILED DEC.18, 1916- Patnted Sept. 7,1920;

aw A vb mw wh bw v L. E. LA BOMBARD. MACHINE FOR MAKING DOUBLE WALL BOXES.

Patented Sept. 7,1920.

4 SHEETS-SHEET 3- APPLICATION FILED DEC. I8, 1916.

E: El L I i :55 Y OQ L. E. LA BOMBARD.

MACHINE FOR MAKING DOUBLE WALL BOXES.

APPLICATION FILED DEC. 18. me.

1,352,283. Paten tedSept. 7, 1920.

re s

. see s nets;

LEON E. LA IBOIVIBARD, OF CHELSEA, MASSACHUSETTS, ASSIGNOR TO SPECIALTY AUTO- MATIC MACHINE COMPANY. OF CHELSEA, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MACHINE FOR MAKING DOUBLE-WALL BOXES.

Application filed Decemberls, 1916. Serial No. 137,535.

To all whom it may concern:

Be it known that I, LEON E. LA BOMBARD, of Chelsea, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Machines for Making Double-Wall Boxes, of which the following is a specification.

This invention relates to machines for automatically folding over the margins or edges of previously scored or creased paper or paste board blanks for the production of what are known as double-side or double-wall boxes.

One of the objects of my invention is to provide improved means for insuring accurate travel of the blanks through the machine, from the time they leave the supply table, past the folding devices, and to the delivery end of the machine.

Another object is to provide continuouslyoperating folder belts the edges of which act upon the portions of the blanks to be folded.

Another object is to provide. improved means for holding the carrier belt down upon the work.

With these and other objects in view, my

invention consists in the construction and combination of parts substantially as here-' inafter described and claimed.

0f the accompanying drawings,

Figure 1 is a side elevation of a complete machine embodying my improvements, a portion of one end being broken away.

Fig. 2 represents a longitudinal section of the machine.

Fig. 3 is a plan view.

F ig. i represents a transverse section of Fig. 3 on a larger scale. I r

Fig. 5 is anend view from the right of Fig. 1, on a larger scale.

Fig. 6 is a view similar to the middle portion of Fig. 2, on a larger scale.

F ig; 7 is a detail elevation of arts looking in the direction of the arrow in Fig. 3;

Fig. 8 is a detail elevation of parts looking in the direction of the arrow 8 in Fig. 3.

The supporting frame of the machine comprises sidebars 12 mounted upon suitable leg supports 13. machine is an inclined table lat for the blanks 00, said table preferably having means whereby its angle of inclination may be ad- Specification of Letters Patent.

At one end of the Patented Sept. a, teen.

justed. As the particular structure of the blank supporting table forms no part of my present invention, further description there" of will be unnecessary.

To feed the blanks and to carry them through the machine while their edges are being glued and folded as hereinafter described, I provide an upper endless belt 15 and a lower endless belt 16. In practice the lower belt 16 is of leather although any suitable material may be employed therefor. The upper belt 15, however, is of material possessing more readily than leather the function of taking a frictional hold of the blanks.v An inelastic belt is best for this purpose, such belt having a foundation of inelastic fabric with an upper layer or facing of rubber... This is because the upper belt is employed to take the blanks from the table 14 and assure their passage entirely through the machine properly spaced. Said belt passes around a pulley 17 carried by a the relative positions of these parts being such that there is a space across which the blanks must pass from one to the other. My invention, however, referring especially to the belt 15, provides for carrying the blanks through the machine with no opportunity for them to change their spacing. This is because the carrier belt 15 serves also as a combing device for taking blanks singly and directly from the pile on the table 14.

The lower belt 16 cooperates with the up-- per belt in carrying the blanks through the machine, said belt 16 being mounted at one end upon a pulley-22 carried by shaft 23 and at the other end upon a pulley 24 carried by a shaft 25, the shaft 20 having a gear '26 (Fig. 3) meshing with a similar gear carried by the shaft 25.

' The upper belt passes over adjustable idle rolls 27, 28 to act as belt tightening rolls, and the lower belt passes over rolls 29, 30, for a similar purpose.

Referring partlcularly to Figs. 4 and 7, the upper stretch of the lower belt 16 passes over a series of rolls 31 mounted in suitable bearings carried by a rigid bar 32 which is suitably chine. To hold the lower stretch of the upper belt 15 in'proper proximity to the belt 16, I employ a series of rolls carried by a bar 33 which is rigidlysupported by crossbars 34, 35, 36 (Figs. 1 and 2). Adjustably carried by the bar 3.3 are rolls 37 yieldingly mounted in pairs. The rolls 37 of each pair have their bearings in a pair of'parallel plates 38 (see also Fig. 4) the upper edges of whichproject up and overlap closely the sides of the bar 33. Secured between the two plates 38, near the middle thereof, is a block 39, said block having a vertical aperture to receive the lower end of a screw loose lly v40. he threads of the screw do not extend into the block 39, said screw being simply rotatively mounted in said block and retained therein by a cotter in 41, or other suitable retaining device. smooth lower portion of the screw is a washer 42 between which and the top of the block 39,is a coiled spring 43. The threaded portion of each screw 40 engages a threaded aperture in the bar 33.

The structure just described enables each roll 37 to yield independently and yet the two rolls of each pair can simultaneously be adjusted to bear with greater or lesser pressure upon the lower stretch ofthe belt 15, by turning the screw 40 in thebar 33. It will 'be readily understood-that turning the screw down compresses the spring 43. Owing to the lower portion of the screw being formed like a smooth pin, the entire roller carriage of the rolls 37, act as guides for the edges of the belt 15. As so far described, a machine of this character would be adapted to carry blanks along from a table so that their edges or any flap portions thereof might be folded by any preferred mechanism which would operate upon the edges or flaps while the blanks are traveling. I will now describe the particular edge folding mechanism adapted for the production of what are known as double wall boxes. Such boxes are usually made from paper or pasteboard blanks each longitudinal edge of which has two parallel creases so that the outer edge ortion can be folded over and glued'to the inner edge portion, and then the double supported by the frame of the ma-- ounted on the thick part so formed can be afterward strips of suitable ad esive, referred to as glue, to theunder surfaces of the extreme outer edges of the blanks and to then fold those portions down and in and up against the adjacent under surfaces of the blanks, so as to form the parts which are later to present the double-thick or double-wall sides of the boxes. It is to be understood that during this operation, the belts 15 and 16 grip the middle portions of the blanks so as to carry said blanks along positively and without liability of twisting or turning askew so that the folding devices presently explained will operate properly.

Referring to Fig. 3, two glue boxes 44 are mounted on suitable cross rods of the machine, so that they can be laterally adjusted according to the width of blanks being operated upon. Projecting up through an o ening in each glue box is a glue wheel 45.

1, 2, 3 and 4) for carrying the folder mechaarallel with the mid-widthbars 32, 33,-. i and on each side thereof, is a bar.46 (Figs.

nism presently described. Each bar 46 is i The bar sections 46 are recessed toreceive rolls'51 as shown in Figs. 4 and 6, therecessed portions having side lates to carry the stud bearings for said ro ls. Two belts 52 are mounted, at one end, upon the pulleys 48, and at their otherlends upon pulleys 53 carried by the shaft 20, and pass under the rolls 51. The two belts 52 press upon the marginal portions of the blank the under surfaces of which are supported by the lower or folding belts hereinafter described. The lower edges of the side plates which cover the recessed portions of the bars .46, act as guides for the outer edges of the-belts 52 as indicated in Fig. 4.

Projecting outwardly from each of the bars 46 are three pins 54 (Figs. 3 and 6) upon each of which is clamped a split block 55 so that said block can be adjusted toward or from the side of the bar 46. Secured to one side of each block 55 is another split block 56 to accommodate the vertical pin 57 projecting upwardl from the bar whlch controls the lower or olding belt 58 (Figs. 1, 2, 3 and 6). The bar for controlling or guiding each of the. lower belts 58 is made in two sections 59, 60, the outeredgesofthe bars being thicker than the inner portions ber carrying a vertical pivot 62 upon which is mounted one end of the bar section 60.

This constitutes practically a universal joint between the two bar sections 59, 60, so that while each bar as a whole may be vertically adjusted by means of the pins 57 in clamp blocks 56 they may be laterally adjusted by means of the clamp blocks 55 on pins 54. These adjustments enable me to operate on blanks of difi'erent thickness or quality of material. Each bar section 60 is vertically inclined as indicated in Figs. 1, 2 and 6, and is laterally inclined as shown in Fig. 3, these angles of inclination being capable of variation by means of the clamp block and pin structure described. As shown in Fig. 6, one end of the bar section 60 has a bracket 63 carrying a pulley 64 for one end of the belt 58, the other end of said belt being mounted upon a pulley 65 carried by shaft 25 (Fig. 2).

To impart a preliminary fold to the narrow edge portions of the blanks so as to turn themdown to position where they will be acted upon by the inner edges of the belts 58, I provide two folder bars or rods 66 (Figs. 1, 2 and 3) each having a shank 67 mounted in a universal block connection 68 (similar to the one indicated at 55, 56 and 57 in Fig. 6), carried by-a pin 69 projecting from a bracket 70 carried by bar 46. These rods 66 extend closely adjacent to the pulleys 64 so that after they turn down the extreme edges of the blank, they will keep control of said edges until they turnthem down to a practically vertical position to carry said edges just inside of the inner edges of the folding belts 58. As will be readily understood from Fig. 6 when the belts 58 first take control of the blank edges, they do so by contact with said edges at a considerable distance from the line of the crease along which the blank has been broken down by the rod 66. Of course it will be understood that the blanks are previousl creased on the intended folding lines, be ore they are fed to the machine. To insure the breaking down or preliminary folding of the blanks correctly on their creased line, I emplo inside formers, each consisting of a bar 1, (Figs. 1, 2 and 6) carried by a bracket and by another similar bracket 72, each of the bars 71 having a tapered extension 73 the extreme end of whichreaches to a point close to the hinge connection of bars 59 and 60, as shown in Fig. 6. Said bars 71 and their tapering extensions 73 support thebuter portions of the blanks as they are fed, not only during the operation of the folder rods 66 but also after the blanks have passed beyond said rods and passed under the upper belts 52.

As the marginal portions of each blank pass from the left hand portion of Fig. 6 to the right hand portion, the point .of contact of the inner edges of each folding belt 58 gradually shifts upwardly to approach the crease line of the blank. As shown in Fig. 3, the lateral inclination of the portion of each folding belt 58 which first acts upon the blank, is such that said belt gradually extends under the belt 52 so as to carry with it the turned under edge of the blank until, as it reaches the discharge end of the machine, it is folded flat between the two belts 52, 58, as. indicated in Fig. 4. All of the folding operation of the belts 58 is by their inner edges, while. the pressing operation, in 'cooperation with the belts 52, is performed by their flat surfaces. By this construction I am able to keep a better control of the edges or flaps of the blanks which are to be folded, when said edges orflaps are narrow,-than can be effected by means of twist belts or a succession of different folding members.

The control is continuous; that is, there is no interruption or break in the control, and at thesame time I am able to turn the flaps or edges in, and flat against, the body of the blank by an action which gradually progresses from the extreme edges of the blanks toward the creased lines thereof. By this means I avoid, or greatly reduce, the tendency of the folding means to exert such pressure, close to the crease lines, as to produce improper folding, or to buckle: the blank or otherwise divert it'from a correct fold on the creased lines.

It is to be understood, of course, that all .the parts which need to be laterally adjusted for blanks of varying widths are provided with means to enable the proper adjustments to be effected. As such means form no part of this invention a detailed description thereof is unnecessary. 'Of course the table 14 has laterally adjustable side guides for the zlilanks, such side guides being indicated a When the blanks pass beyond the vertical plane of shafts 20, 25, they pass between two pressing rolls 75 (Figs. 2 and 5). Below said rolls is mounted a large roll or drum 76 for a delivery belt 77 leading to any suitable mechanism such as a stacker. I prefer to vary the speed of the belt 77 relatively to the speed of travel of the blanks through the machine. To this end, the shaft 78 of the drum 76 has a worm wheel 79 (Fig. 8)

which is driven by a worm 80 carried by a 86 secured to shaft 81-, yieldingly holds the disk 83 in contact with the disk 82. Said disk 82 is provided with any suitable means prising an inclined table 1 nisins whereby it may be adjusted lengthwise of shaft 20 so as to act upon disk 83 at such desired distance from the axis of rotation of the disk as to impart the required speed of rotation to shaft 78 of the delivery drum and belt. Inasmuch as the driving connections, including the particular gearing, form no part of the present invention, de-

tailed description of such parts thereof as in the drawings are unnecessary herein. Inasmuch as the operations of the several parts of the machine have been described in connection with the description of the structures thereof, a generaL description of the operation of the machine as a whole will be unnecessary.

Having now described my invention, I claim:

1. A machine having folding devices for box blanks, a pair of coacting carrier belts for causing. the blanks to travel while being folded, and a table for a pile of blanks, said table being in position to cause one of the belts to comb the blanks singly from the table.

2. A folding machine of the character dew scribed, comprising upper and lower coactbl nks held between said belts, and a stationary table for delivering blanks singly and directly to the nip of said belts.-

3. A. folding machine of the character described, comprising upper and lower coacting carrier belts, folders for operating on blanks held between said belts, an inclined table for a pile of blanks, and a support for the front edges of blanks on the table, said support being most blank of said belts.

4. A. machine for folding blanks, comappear the pile directly to the nip of mechanisms for folding the blanks, and means for automatically gripping the blanks at said table and, carrying them continuously gripped past the foldingmechanisms.

5. A machine for folding blanks, comprising an inclined table for the blanks, mechafor folding the blanks, and means for frictionally gripping the blanks at said (table and carrying them continuously gripped past the folding mechanisms.

6. In a machine of the character described, a table for a pile of blanks, folders for acting on portions of the blanks, a single endless friction carrier for taking the blanks singly directlyfrom the table and passing them through the machine, and means cooperating with said carrier to preserve frictional contact thereof with the blanks.

7. In a folding machine for paper blanks, an endless carrier belt, a fixed support para} lel with the operative portion of the belt, a series of yieldingly mounted adjustable carrier belts, folders for operating onpositioned to guide the top for the blanks,

bearing on said belt, and means cooperating V with said belt for folding blanks carried thereby.

9. In a foldingmachine having a pair of cooperating belts, a fixed bar adjacent and parallel with the operative portion of one of said belts, and a series of belt pressing devices carried by said bar, each ofsaid devices comprising a pair of plates, a block connecting the plates, a pair of rolls carried by the plates, a screw engaging a threaded aperture in said bar and loosely engaging the block, and a spring bearing on said block.

10. In a folding machine having a pair of cooperating belts, a fixed bar adjacent and parallel with the operative portion of one of said belts, and a series of belt pressing devices carried by said bar, each of said devices comprising a pair of plates overlapping the sides of the bar and belt, rolls carried by the plates, and means for yieldingly means for carrying blanks between said belts with their portions to be folded in contact with the edges of said belts, means being provided for varying the amount of lateral diversion of said belts.

.13. In a machine of the character described means for causing blanks to travel, folding belts having their operative portions partly inclined relatively to, and partly parallel with, the plane of travel of the blanks; said belts being mounted to present their inner edges to the portions of the blanks to be folded 14. in a machine of the character described means for causingblanks to travel,

tive portions from a straight path, andthe blanks to be folded, the said inclined portions of the belts being also laterally inclined.

15. In a blankfolding machine, means for causing the blanks to travel,-belts having fiat portions presented edgewise to the portions of the blanks to be folded, and means for guiding said portions of the blanks to position to be acted upon by the inner edges of said belts.

16. In a machine of the character described, a pair of folding belts, means for causing blanks to travel between the inner edges of said belts, and flat guides for portions of said belts, said guides being vertically and laterally inclined relatively to the path of travel of the blanks;

17. In a machine of the character described, a pair of folding belts, means for causing blanks to travel between the inner edges of said belts, and flat guides for the operative portions of said belts, each of said guides comprising two sections. end to end, the sections between which the blanks first enter being inclined relatively to the other guide sections.

18. In a machine scribed, a pair of folding belts, means for causin blanks to travel between the inner edges g f said belts, and flat guides for the operative portions of said belts, each of said guides comprising two sections end to end, the sections between which theblanks first enter being inclined relatively to the other guide sections, means being provided for varying the angles of inclination of the last-mentioned sections.

of the character de-- In testimony whereof I have afiixed my signature.

LEON E. LA BOMBARD.

Images