US2642285A - Blank magazine for folding box machines - Google Patents

Description

T. R. BAKER ETAL BLANK MAGAZINE FOR FOLDING BOX MACHINES June 16, 1953 4 Sheets-Sheet 1 Filed Oct. 25, 1950 INVENTOR. THoMAs R. BAKER By EDWARD J. PA6 ND4RM M ATTORNEY June 16, 1953 1'. R. BAKER sru. 2,642,285

BLANK MAGAZINE FOR FOLDING BOX MACHINES Filed 001;. 25, 1950 4 Sheets-Sheet s INVENTOR.

Fin/44s REA/(ER y EDWARD J. PAGE/VDARM Mll- ATTORNEY June 16, 1953 BAKER ETA!- 2,642,285

B LANK MAGAZINE FOR FOLDING BOX MACHINES 4 Sheets-Sheet Filed Oct. 25, 1950 INVENTOR. Tuomas R. BAKER BY EDWARD J. PAGENDARM A TTORIVEY Patented June 16, 1953 BL NK MAGAZINE FOR FOLDING BOX ZMACHINES Thomas R. Baker, Sunnyvale, and Edward J. ,Pagendarm, San iMateo, Calif., assignors to :Bcmiss-Jascn Machine 00.,

Calif,., -a partnership San Francisco,

Application -ctober 25, 1950, Serial No. 192,014

This invention relates to improvements in machines for setting up folding'boxes and provides, more particularly, an improved-form'of magazine in which a stack of blanks may be stored and from which individual blanks are fed into the box formingsection of the machine. Numerous forms of magazines are in use in folding box machines. These magazine's may conveniently be classified according to the position the blanks assume in the magazine.

' There are firstly vertical magazines, also called hoppers, which contain a vertical stack of-jblanks, each blank lying substantially horizontal. The magazine is usually loaded at the top and blanks are withdrawn at the bottom. A characteristic distinction .of these magazines resides in the fact that the weight of all the blanks rests on the bottommost blank; the weight being :thegreater, the taller the stack I "There are secondly magazines in which the individual blanks rest either in a vertical or in an inclined position. A characteristic distinction of thelatter group of magazines is that the blanks rest on edge. Each-blank thus supports its own weight, regardless of the number of blanks in the magazine. Thisis substantially true even in cases where the blanksare slightly inclined unless the angle is of the orderof 45 degrees 'or more withrespect to the vertical, in which event each blank rests, to some extent on the following blank. Nevertheless even in the case of substantial inclination of' the blanks the pressure which one blank exerts on the next is not substantially influenced by the length of the stack in the magazine. 1

"The present invention'may be consideredas falling within the second class ofmagazines.

In box-forming machines operated at high speeds it is of great importance thatthe blanks are removed from the magazine one by .ones'with. out'danger of :several blanks adhering together.

It is furthermore important that each of the blanks may be grasped and removed from the magazine from an accurately definedposition so that-the position of the frontmost blank in the magazine serves to align the blank with respect to certain box forming mechanism; making it unnecessary to realign the blank-after its removal from the magazine and prior to passage into and through the box forming mechanism. r l

The patent -to Baker and Pa'gendarm No. 2,624,248 dated-January 6, 1953 discloses; a box forming machine capable ofunusually high production rates. The present invention provides 4:0laims. (emu-s2) 2 r a particularly advantageous form of magazine for a box machine of the type disclosed in the aforementioned patent, although the invention is not limited thereto, but has general applica-' tion to other types ofmachines which require reliable feeding of single blanks from a magazine.

In the operation of high speed box machinery it was'found that the feeding problems increase with the size of the blanks to be handled. More particularly it was observed that the removal of the endmost blank of a stack through a gate arresting and confining theblank in the magazine is 'influencedby the pressure which is exerted by the stack on the elements or projections which hold'the endmost blank in its place in the gate. Tests appear to indicate that this pressure tends to vary more in the case of large blanks than in the case of small blanks, and it appears that the weight of the blank as well as the friction which each blank encounters in the magazine are important factors in this connection.

The present invention provides an improved magazine construction in which the weight of the blanks, the length of the stack, and the friction encountered by the blanks in the magazine are practically eliminated as variables, with theresult of greater uniformity and reliability of operation of the machine permitting increased production rates.

The objectsrfeatures, and advantages of this invention will appear more 'fully from the detailed description which follows accompanied by hereto, the invention itself, its objects and adi vantages, and the manner in which it may be carried outmay be better understood by referring to the following description taken in connection with the accompanying drawings form ingapart of it in which:

Figure 1 is a perspective side view of a maga-.

zine incorporating the present invention;

Figure 2 is a perspective :view of the front end a of the magazine showing also a suction feeder for removing the frontmost blank;

Figures 3 and 4 are perspective detail views 3 illustrating the operation of the blank supporting rods of the magazine; and

Figure 5 is a perspective view of the front end of the magazine showing removal of the frontmost blank from the magazine.

In the followingdescription and in the claims various details will be identified by specific names for convenience. The names, however, are intended to be as generic in their application as the art will permit. Corresponding reference characters refer to corresponding parts in the several figures of the drawings.

In the drawings accompanying, and forming part of, this specification, certain specific disclosure of the invention is made for the purpose of explanation of broader aspects of the invention, but it is understood that the details may be modified in various respects without departure from the principles of the invention and that the in vention may be applied to the one shown. 2

Referring to Figure l, the magazine comprises a gate H anda back plate l2 mounted on the framework E3 of the box machine which the magazine is to supply with blanks. The particular construction of the box machine is of no importance to the understanding of the invention, but reference may be had to the aforementioned Baker and Pagendarm Patent Number 2,624,243 disclosing a machine in which the box forming mechanism proper comprises a die and a plunger which forces the box blank through the die. A suction feeder serves to transfer the blank from the magazine to the die, as will also become apparent from the present description.

The magazine gate H and the'back plate 12 are removably attached to the box machine frame by Wing nuts 14 and I5 and may be replaced for convenient change-over of the machine from one other structures than box or blank size to another.

tion a'is indicated in the drawing at 22.

The blank supporting rods 16 and I? are so arranged that a stack of blanks 23 is automatically aligned with respect to the front gate when the blanks are placed on edge on the rods. As is apparent from Figure 2, the rods (6 and II fit the configuration of the blanks with close tolerances.

In the illustrated example the rods engage cutouts in the outer edges of the blank. It is therefore evident that the magazine can be adjusted for blanks of different size or configuration b a simple exchange of the front gate I I and the back plate 12 for a gate and plate providing the required spacing for the rods I6 and II.

The gate H is upright with respect to the rods l8 and I! and comprises blank engaging lugs or projections 24, 25, 26, 2'! and 28 which engage the frontmost blank of the stack 23 and prevent it from falling out of the gate.

Two track bars 29 and 3B are mounted in members Hand 32 of theframework H. The track bars are parallel to the rods l6 and I1, as indicated at 33, and support a carriage 34 of a follower 35 engaging the rearmost blank of the stack 23. The carriage runs on the track bars 29 and 30 in antifriction bearings 35 and 37, preferably of the translatory ball bearing type offering exceedingly little friction to translatory movement of the carriage along the track bars 29 and 33, but preventing tilting with respect thereto.

The carriage 34 is biased towards the gate to urge the stack of blanks 23 towards the feeding mechanism later to be described.

In order to eliminate variations in the bias force which would be present in the event the force were supplied by springs, the carriage is weighted, thus tending to run down the inclined track 29, 30 towards the gate H with a force which is independent of the length of the stack of blanks 23.

In order to eliminate the friction which the blanks encounter on the rods l6 and II, a rotary motion isimparted to the rods, preferably in counter-rotation. For the sake of convenience and simplified construction the rotary motion may be limited to a predetermined angle. For this purpose the rods 16 and I! carry lugs 38 and 39 in which pins 40 and 41 are mounted in sockets of the ball type permitting slight amounts of tilt of the pins 40 and 4| With respect to the lugs 38 and 39.

A rocking shaft 42 mounted in the framework l3.carries a further pair of lugs 43 and 44 with pins 45 and 46, and connecting rods 41 and'48 engage the pins 46, 45 and 4!, 46, respectively, with the result that rocking of the shaft 42 causes oscillation of the rods l6 and I! about their axes.

In order to provide for the actuation of differently spaced rods l6 and H the lugs 43 and 44 are'longitudinally adjustable on the prismatic rocking shaft 42 and may be clamped in place by wing nuts 43 and 50.

The rocking shaft 42 is coupled in an appropriate manner with a reciprocating element of the box machine, this being a shaft 51 in the illustratedexample. The shaft 5| carries an arm 52 from which a rod 53 extends to a similar arm 54 on the rocking shaft 42.

The pins 40, M and 45, 4B are conveniently equipped with ball-type friction detents 55, as shown in Figure '4, permitting quick removal and attachment of the connecting rods 47 and 48 without the use of tools.

The blanks are removed from the magazine gate i I, one by one,'by an appropriate feeding device, preferably of the pneumatic type.

The illustrated feeding device comprises two suction cups 56 and 51 whose arms 58 and 59 are adjustably mounted on a prismatic bar 60. The bar 60 is secured to arms 6! and 62. The arms GI and 62, in turn, are pivoted to levers 63 and 64 at 55 and 66;" The levers 63 and swing about pivots of which one is visible attl and the movement of thearms 6| and 62 with respect to the levers 63 and 64 is further controlled by a roller 68 engaging a guideway 69 on one of the levers. 1

As a result a complex translatory and swinging motion is imparted to the suction cups 56 and 51. The individual phases of this complex motion are of no particular moment in considering the present invention, except that it may be stated that'during the initial stage of the motion a blank is withdrawn from the gate past the retaining projections of the gate in a direction in which'the blank remains substantially parallel tothe stack of blanks. This isillustrated in Figure 5. Thereafter, the blank is swung through an arc and deposited by the suctioncups on the box forming mechanism proper (not shown). a

Since the blank is accurately aligned in the gate, since the cups hold the blank positively and Without slipping, the position, in which the blank is finally deposited by the cups, bears a precisely defined relation to its prior position in the gate, and no realignment is necessary.

The operation of the improved magazine is evident from the following description.

Blanks are placed edgewise on the rods l6 and I! after withdrawal of the follower 35 for a distance sufficient for insertion of the necessary number of blanks. The follower is then released and urges the blanks towards the gate with constant force. The blanks, regardless of number, are supported on the rods I6 and I! without friction, and without vibration, due to the constant oscillation of the rods.

When the machine is to be adjustedfor blanks of a diiferent configuration 'or size, the front gate II and the back plate l2 are exchanged for others of appropriate size, and the lugs '43 and 44 as well as the feeder cups 56 and 51 are moved to, and clamped in, appropriate new positions.

The invention thus provides an improved blank magazine which is vibration-free and practically frictionless resulting in substantially constant pressure of the frontmost blank on the retaining projections or members of the gate.

What is claimed is:

1. A blank magazine for storing and feeding a stack of flat box blanks in a folding box machine, the magazine comprising, a pair of rods for edgewisely supporting a stack of blanks; a front member for arresting and retaining the towards said gate member; and means for imparting an oscillatory motion to said rods about their respective axes, the direction of oscillation of one rod being opposed to the direction of oscillation of the other rod.

3. A blank magazine for storing and feeding a stack of flat box blanks in a folding box machine, the magazine comprising, a pair of substantially horizontal rods for edgewisely supporting a stack of blanks; a gate member upright with respect to said rods for arresting and retaining th frontmost blank of the stack in a predetermined position for removal; a follower for engaging the rearmost blank of the stack, said follower being mounted for movement substantially parallel to said rods and biased towards said gate member; and means for oscillating said rods about their axes in opposite directions 4. A blank magazine for storing and feeding a stack of flat box blanks in a folding box machine, the magazine comprising, a pair of parallel rods forv edgewisely supporting a stack of blanks, said rods being inclined about ten degrees with respect to the horizontal; a gate member upright with respect to, and located at the lower end of, said rods for arresting and retaintially parallel to said rods and biased towards frontmost blank in a predetermined. position gate member upright with respect to said rods for arresting and retaining the frontmost blank of the stack in a predetermined position for removal; a follower for engaging the rearmost blank of the stack, said follower being mounted for movement parallel to said rods and biased 'said gate member by gravity; and. means for oscillating said rods about their axes in opposite directions. I

THOMAS R. BAKER. EDWARD J. PAGENDARM.

References Cited in the file of this patent UNITED, STATES PATENTS Sells Jan. 8, 1946

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