US2647446A - Waste stripping mechanism for carton blank forming apparatus - Google Patents

Description

- e. KANE 9 79 WASTE STRIPPING MECHANISM FOR CARTON BLANK FORMING APPARATUS 2 Sheets-Sheet l Filed Feb. 28, 1951 mmw mm NQ \n INVENTOR.

M aT ca ATTORNEY Aug. '4, G. KANE WASTE STRIPPING MECHANISM FOR CARTON BLANK FORMING APPARATUS 2 Sheets-Sheet 2 Filed Feb. 28, 1951 IN VEN TOR. 14M (44;

ATTORNEY Patented Aug. 4, 1953 WASTE STRIPPING MECHANISM FOR CARA,- TON BLANK FORMING APPARATUS Gideon Kane, Green Bay, Wis.

Application February 28, 1951, Serial No. 213,097

The invention relates to carton blank forming apparatus and more particularly to a method and apparatus for automatically removing the waste from the cut carton blank.

In carton making, the general practice has been to remove the waste from the cut blank manually. The object of this invention is to provide a method and apparatus by which the stripping of the waste from the blank is accomplished mechanically. More particularly, with the present apparatus, after the blank is cut by the blanking press, it is fed past a stripping mechanism which operates in synchronism with the feed of the web to the blanking press, and the waste from the blank is positively removed as the blank is carried to a mechanism fore delivering the finished cut blank from the machine. The stripping mechanism includes a pair of rolls between which the cut blank is fed, one of these rolls provided with pin disposed to engage the waste portions of the blank and upon which said waste portions are impaled as the blank passes to the delivery mechanism, the impaled waste portions being subsequently removed from the pins on the above mentioned roll.

A further object of the invention is to provide a stripping apparatus including a wooden or wooden faced roll of the same diameter as that of the printing cylinder, used to repeat print on the web which is fed through the blanking press, which roll is driven at the same speed as the feed mechanism for the blanking press, so that substantially absolute registry is obtained to bring the waste portions of the cut blanks into contact with the same areas of said wooden faced roll, said wooden roll having pin projections disposed-in said waste portion areas upon which these waste portions are impaled as the blank is carriedout of the press. In connection with this mechanism a simple method of locating the waste removing pins has been developed comprising successively nailing down the waste portions of a cut blank onto the wooden roll as the blank is carried out of the press and successively cutting off those portions of the nailsthat project above the nailed down waste portions to form a stripping roll for removing the waste from the particular form of carton blank then being cut by the blanking press. While a different wooden roll is used for each different form of carton blank, these rolls are relatively inexpensive, and the method above described insure positive removal of .the waste portions of the blank in an expeditious manner.

The invention further consists in the several 2 Claims. (01. 93-36) features hereinafter described and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. 1 is a side elevation view of blank forming apparatus including the stripping mechanism embodying the invention;

Fig. 2 is a plan view of the apparatus, parts being broken away;

Fig. 3 is a detailed vertical sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a detailed vertical sectional view taken on the line 4-4 of Fig. 3;

Fig. 5 is an end elevation view of the delivery conveyor and its supporting frame;

Fig. 6 is a detailed elevation view of a portion of the stripping mechanism and a carton blank;

Fig. 7 is a detailed vertical sectional view taken on the-line 1-! of Fig. 6.

Referring to Figs, 1 and 2, I have shown a blank forming apparatus corresponding to that of my copending application Serial No. 165,015, filed May 29, 1950, for Method and Apparatus for Making Box Blanks, to which reference may be had for details not specifically shown and described herein, such parts of this apparatus being shown herein as are directly associated with the stripper mechanism embodying this invention. The apparatus includes a frame I [I having a blanking press P mounted thereon including a reciprocatory platen II on which the cutting dies D are mounted, which dies cooperate with a stationary platen (not shown) on said frame to cut the carton blank from the web W as it is intermittently advanced through the apparatus. For advancing the web W to the press a set of feed rolls I3, I4, and I5 draw the web from a supply roll or from a printing press and advance it to form a loop I6 which passes upwardly over a curved apron II forming part of a flat bed I8 over which the web passes and along which it is drawn by sets of draw rolls I9 and Zll cooperating with a pin belt 2|, to advance the web to the blanking press P.

As in the aforementioned application, a geared head electric motor M is operatively connected by a belt and pulley drive 22, to a shaft 23 connected by gears 24 and 25 with a lay shaft 26, which shaft is connected by a chain and sprocket drive 27 to the platen operating crank shaft 28 and by a belt and pulley drive 29 to a shaft 30. The crank shaft 28 is operatively connected to the reciprocatory platen I I by connectin rods 3|. The shaft 30 carries variable length crank mechanism 32 whose adjustable crank pin 33 is pivotally connected to a rack bar 34 which. meshes with a pinion 34a, loose on a shaft 35 and connected with an oscillatory feed pawl 36 engageable with a ratchet wheel 36a fixed to the shaft 35, which shaft carries the draw rolls. The pawl and ratchet drive mechanism above described functions to intermittently advance the web W into the blanking press in amounts equal to the carton blank lengths with the printed matter in proper registry with the finished blank. The shaft 35 is also operatively connected to the feed rolls l3, Hi, and 55 through a belt and pulley,

drive 31 to a shaft 38 connected by a chain and "59 bearing upon the roll 44 and straddling the sprocket drive 33 to a shaft. do connected by, a

belt and pulley drive M to a shaft-d2 whiomas shown in said application, has a gear connection indicated here by Mic with gears on the shafts for the rolls 13, M, and I", soirthat the feed of,

the web to the loop is the same as the feed of said web through the draw rolls l9 and 20.

Ihe stripper mechanism embodying the invention includesa pair of feed rolls A3 and M,

driven from the shaftffio l to advance the :blanked.

web from the blanking press the same amount it is fed into said press, that the length of a carton blank andatthe same rate.

pins 56 pry the impaled waste from the roll 44. As previously noted, the diameter of each roll :46! is the same-as that of the plate cylinder used .in printing the carton blank and the sprocket 4!) used to drive this roll has the same pitch .cliameter .as the diameter of said plate cylinder.

The feed roll #3 is a soft faced =rubberirol1 whose. shaftntta is ujournalled :in .an auxiliary frame F and is positively driven by iaisp rocketi d5 meshing withIone of the runs-of a double chain ii: running over a double width sprocketdl so that this roll is positively driven. The :outer diameter of the roll 'l l is such that its circumference is equal to the length of the cut blank.

and is of the same diameter as that of the plate cylinder used in "printing the web inthe spaces thereof forming portions of the finished cut blanks and the pitch diameter of "the sprocket a 49 is the'sam'e as the diameter of the roll ll and i the pitch diameterof the sprocketd'i is'the same as that of rolls i so that the of web fed int out of the press same length o the blanking press will 'be fed by the'rollsdfi-and M and the same portions of the cut blanks and waste carried out of the :press will always contact the i same spots on the -ro'll i t.- Thusthe roll M- is a repeat roll foreach particular design-of blank blanked out by the :cutting and creasing prcss,

and since these designs mayhvary sothat-the diameters of the rollsdlii may vary, the shaft 48 for the roll .lhl :isjournalled in .verticailyadjust-able bearing boxesfifi carried by jfeed screw shafts 51 mounted in the frameigFtowaccoma modate the different sizes ofv rolls "A l that maybe used.

For tensioning the double chain M5,v avdouble tooth sprocketfiil is rotatably mounted ona stud shaft '53 -.carried.by a vertically adjustable block 54 carried by a feed screw shaft. 55 meuntedin the frame For strippinggthe'waste from the cut blank the roller hl is provided-with waste impaling pins .56, v

one .or more of whichzareilocated in the-peripheral surfaceof. said roll :at .those points .where the waste passing :hetween the rolls #3 .and 44 occurs.

Referring to Figs. Sand 7., .as asimple method of locating rthe pins 56 01113118 repeat roll :44, the

first cut blank 53 with its waste 'Wa on being :led.

out of itherpresslhas itsswasteportions'Wa tacked,

or :nailed'ontolithe roll :54- by .small wire nails or abrads 25.11. whose ihea'ds or ;those portions :58

Each finger 59 is connected to or united with a metal collar 69 slidably, mounted on a supporting shaft iii and securable in adjusted position thereon-by a set screw '62, said shaft extending parallel to and below the axis of the shaft 48 and connected at its ends to slotted supporting arms 83 which in turn are vertically adjustably secured to the frame F by clamping bolts td threaded into said frame and carrying spacing collars 65.

After the waste is removed from the cut'blank, it is fed by the rolls '43 and 44 into the bight of a pair of delivery aprons formed by sets of spaced endless belts it running over spaced rollers B1.

The journals for the outer rollers -61 of each set are adjustably mounted on the f-rame F through jack screws 68 to vary the tensions of the belts 6E. The shaft for the lower inner roller 6'! carries a sprocket 9 connected by a chain 1|),tensioning sprocket ll, and sprocket "1 2 to the drive shaft l3 of an electric drive motor 'l l. The shaft for the upper inner roll 61 is-eccentrically mounted in its adjustable bearings ill in the frame Panel at one end carries a gear '16 meshing with a gear (not shown) on the shaft for the lower roll.

To provide ready access to the dies of the blanking press, the frame F is mounted to swing out to one side of the press and 'i-s provided with a castor wheel leg -l l, said frame being mounted to swing about a hinge pin 18 mounted at one corner of the press P. For holding the frame F in proper alined position when the press is operating, guide rods "l9 'and slidably mounted in brackets 8 l and 82 on the frame Fare slidable into slotted bracketslllc and Moon the frame of g the press P, and the guide rod Bil-also slides through-a slot 83 in the hinge pin 18 to lock the frame Fagainst swinging movement. "The -ciroumference of the roll fi l-is the same as the length -of the web from which anyone of the carton -blanks are out and the term length of the carton blank refers to this'lengthwhich, of course, may be slightly longer than the actual =length of the carton blank itself.

I desire'it to be understood that this invention is not to '-be limited to any particular form or arrangement of parts except -in so *far as such limitations are included in theclaims.

What I claim as =my invention is 1. In the carton blank art, the method of 10- eating waste inipaling pins in a'stripper roll which comprises takinga roll having a facing capable jectingends of said .nails to form :the :impaling pins for the removal of Waste from other lblanks :carried-oversaid roll.

cut blank which comprises making a roll having a facing capable of anchoring nails and having a circumference equal to the length of the blank tobe stripped, moving a cut web in contact with said roll as the roll is rotated through one revolution, and driving nails into said facing and through waste portions of the web as it is carried over said roll, and then cutting oil the projecting ends of said nails to form the impaling pins for the removal of waste from other blanks carried over said roll.

GIDEON KANE.

References Cited in the file of this patent Number UNITED STATES PATENTS Name Date Todd Mar. 18, 1890 Coari Oct. 20, 1931 Ungar Oct. 11, 1932 Greenwood Oct. 23, 1934 Ruble Dec. 11, 1934 Bell et al Aug. 25, 1942 Merritt May 2, 1950 Willbrandt July 18, 1950

Images