US2759402A

US2759402A - Machine for removing waste slugs from carton blanks

Info

Publication number: US2759402A
Application number: US386196A
Authority: US
Inventors: Roland T Jedlick
Original assignee: HOWARD G HEMPHILL
Current assignee: HOWARD G HEMPHILL
Priority date: 1953-10-15
Filing date: 1953-10-15
Publication date: 1956-08-21
Anticipated expiration: 1973-08-21

Description

Aug. 21, 1956 R. T. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS e Sheets-Sheet 1 Filed Oct. 15, 1955 INVENTOR; %/0/70 F e////f% Aug. 21, 1956 R'T. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS Filed 001.- 15. 1953;

6 Sheets-$heet 2 Aug. 21, 1956 R. "r. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS 6 Sheets-Sheet 3 Filed Oct. 15, 1953 M MW Aug. 21, 1956 R. T. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS 6 Sheets-Sheet 4 ////akwzz @Z m 8M Filed Oct. 15, 1953 Aug. 21, 1956 R. T. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS Filed Oct. 15, l953 6 Sheets-Sheet 5 a S EN m/ a 5. c O w V 1/ Q v w 0 d W p Ea Z \m\w\ m @Qw ww m& x M

Aug. 21, 1956 R. T. JEDLICK MACHINE FOR REMOVING WASTE SLUGS FROM CARTON BLANKS 6 Sheets-Sheet 6 Filed Oct. 15. 1953.

INVENTOR. //d/0Wd Z c/20 //2'% M %//a///z United States Patent MACHINE FOR REMOVING WASTE SLUGS-FROM CARTON BLANKS Roland T. Jedlick, Chicago, Ill., assignor, by mesne assigmnents, to Howard G. Hemphill, Chicago, Ill.

Application October 15, 1953, Serial No. 386,196

16 Claims. (Cl. 93--58.3)

This invention relates to improvements in a machine for removing waste slugs from carton blanks.

The principal objects of this invention are:

First,,to provide a novel machine for rapidly removing and disposing of the waste slugs which are cutfrom carton blank-sprior to erection of the cartons.

Second, to provide a machine which will receive flat carton blanks or sheets singly from a cutting and scoring machine and advance a slug punching diemember'longitudinally in timed relationship with the. blank and transversely against the blank to punch out waste slug material from the blank and thereafter dispose: of the blank and return for operation on a succeeding blank.

Third, to provide a novel mechanism for simultaneously moving male and female slug punching members longitudinally and transversely Withrespect to each other. in an advancing slug punching motion and retracting; work receiving motion.

Other objects and advantages of the invention will be apparent from the following description and claims. The drawings, of which there are six sheets, illustrate a highly practical form of the machine.

Fig; l is a side elevational view of the machine.

Fig. 2 is a plan view of the machine.

Fig; 3 is an elevational view of the discharge end of the machine.

Fig. 4 is a fragmentary vertical longitudinal cross sectional" view through the machine taken along the plane of the line4'4 in Figs. 2 and 3.

Fig. 5 is a fragmentary transverse cross sectional view takenalong the plane of the line 5-5 in Fig. 4.

Fig. 6-is a fragmentary transverse cross sectionalview taken along the plane of the line 66 in Fig. 4 with the mechanism inra different operating position. i

Fig. 7 is a fragmentary cross sectional view taken along the plane of the line 7-7' in Fig. 4 with the mechanism in still another operatingposition.

Fig. 8- is a fragmentary longitudinal cross sectionaljview through the machine similar to Fig.4 but illustrating the mechanism in a partially advanced stage of the mechanism thereof.

Fig. 9 is a cross sectional view similar tov Fig. 8.but showing the mechanism in a blank punching position.

Fig. 10 is, a fragmentary cross sectional view similar to Figs. 8and 9 but showing the mechanism in a fully advanced position.

Fig. 11 is a fragmentary cross sectional view illustrating the mechanism and the Work at an intermediateposition in the retracting stroke of the mechanism.

Fig. 12 is an enlarged fragmentary cross sectionalv-iew takenv along the plane of the line- 12-42 in Fig, 11' and illustratingthe one way clutch driving connectionto the off feeding roll.

Fig. 13 is a fragmentary prospective view illustrating the driving connection between the work supporting carriage and thewaste slug collecting apron.

Fig; 14 is. a; bottom plane view of the. male punch member.

Fig; 15 is a plan view of the work support and female punch member.

Light cardboard cartons and boxes are commonly made from large flat sheets. of cardboard which are here described as blanks. The blanks are cut, scored and punched in a predetermined pattern to provide the desired walls; flaps and locks of the cartons. Particularly when several small cartons are to be-formed from a single blank there are various areas of the blank which are not needed in any of the cartons. These areas must be removed and may be classed generally as waste or reject slugs. In the high speed production of cartons the removal and disposal of these reject slugs becomes a problem as they cannot be left adhering to the carton blanks Without jamming the automatic machinery for handling the blanks and erecting the cartons. The present invention provides mechanism for rapidly punching out and removing reject slugs from precut blanks. The machine. is. particularly designed. to handle interior reject slugs or slugs thatare entirely surrounded by retained portions of the blank. The machine is further designed to operate with a. blank cuttingand scoring machine capable of delivering cut and scored blanks at-a rapid rate. The machine strips and disposesof thereject slug-sinan efiicient manner and deposits the stripped blanks uniformly in, a. stack for further handling andlseparation of the individualv carton blanks- In. the drawings the. reference numeral 1 indicates sup porting. framework membersgenerally. Inasmuch as'the framework mayv be varied greatly it will not be described in detail except wherein it coacts directly withthemore active elements of' the machine. The framework supports a pair ofIl'ongitudinally extending. side bars 2zwhiclr are supported, in spaced parallel relation from the framework as at 3 and4 (see Figs. 1. and 2). The machine and the side bars 2 may be considered for the purpose of description as having outer ends positioned. on theleft as viewed in Figs. land 2 and inner ends opposite. Extendingtransversely. between and journaledin the side bars 2 is a. cross shaft 5 which forms a. support for the leading end of a. feed conveyor 6. The conveyor 6 consistsof a plurality of transversely spaced. belts 7 as is. shown in Fig; 2'which function to deliver thecut and scored blanks from a cutting. and scoring machine or other source asis indicatedat B.

Spaced transversely inwardly from the side bars 2. and extending longitudinally inwardly from the outer ends thereof are a pair of'guide rails 8. The. outer ends. of they guide rails are supported from a cross bar 9 of. the framework and, the inner ends of the guide railsaresup ported by saddle brackets. 10' securedlto the outer. sides of the side bars 2 and extendingupwardly andinwardly over the tops of'the side bars. Longitudinally reciprocally supported on theside bars 2 is a carriage indicated generally at 11' and having side members 12 bolted to. shoes 13*which slide upon the tops of the side bars 2. Theside members 12 andshoes 13 are connected'at the forward end ofthecarriage by. a cross bar 14. Depending brackets 15 on the inner sides of'the leading end of thecarriage rotatably support a cross shaft 16 having 01f feeding rolls I7 thereon. A second'cross rod 18 on the top.of "the carriage supports'mounting arms 19 for pressure rolls 20 which coact withthe off feeding rolls 17.

The carriage llincluding the off feeding rolls 17 carried thereby'is reoiprocated on the sidebars 2 by means of links 21 which extend rearwardly and upwardlyto the crank arm 22 connect'edto a rock shaft 23. The rock shaft'is -adapted' tobe' oscillated by a push rod 2 4 thatmay beconveniently driven in timed relationship with:theblank'cutting andscoringmachine so that the carriage 11 reciprocatesroncezfor: each carton blank delivered by thezcuttingrandzscoring machine.

Carried bythe carriage 111is a-blanksupportingzplah form and female die member 25 which moves rearwardly With the carriage underneath the delivery end of the conveyor 6 as is clearly illustrated in Fig. 4 on the retracting stroke of the carriage. The platform 25 is level with the meeting surfaces of the oif-feeding rolls 17 and the pressure rolls so that carton blanks B delivered onto the platform by the conveyor 6 will have their lea ing edges advanced to the nip of the rolls. The cross shaft 16 which supports the off-feeding rolls 17 is provided with a pinion 26 at one end which mates with and is rotated by a rack bar 27 secured to the underside of one of the side bars 2. The pinion 26 is not directly connected to the shaft 16 but is drivingly connected there to by a one way clutch 26A illustrated in greater detail in Fig. 12. The clutch 26A is adapted to drive the shaft 16 and off-feeding rolls 1'! in a forwardly rotating offfeeding motion with respect to the platform when the carriage and platform are moving inwardly in a retracting motion with respect to the side bars 2 and rack bar 27. On the advancing stroke of the carriage and the platform 25 the

rolls

17 and 20 are not rotated.

The previously mentioned guide rails 8 which are supported inwardly of the side bars 2 and above the blank supporting platform 25 consist of inwardly opening angle members 23 (see Figs. 5 to 7) having upwardly extending plates or ribs 29 secured to the inner edges thereof. The angle members 28 and plates 29 thus form guide channels 30 which slideably receive and support longitudinally elongated blocking bars 31. The blocking bars 31 are provided with pins 32 at their leading ends which project inwardly through slots 33 provided therefor in the outer ends of the plates 29. Similar pins 34 at the inner ends of the blocking bars project through slots 35 in the plates 29. The

pins

32 and 34 project into the path of movement of upstanding lugs 36 carried on the sides of the platform 25 near the leading edge thereof. The platform 25 and its lugs 36 thus function to engage the

pins

32 and 34 and move the blocking bars 31 longitudinally in the guide rails 8.

The rear ends of the guide rails 8 and the inner plates 29 thereof are inclined upwardly as at 37 to elevate the guide rails above the delivery end of the blank conveyor 6. The guide rails 8 slideably support a rectangular male die carrier 38 having supporting rolls 39 projecting from its sides into supported relation with the upper edges of the plates 29 on the guide rails 8. The carrier 38 is a flat permanent structure adapted to have flat male die members 38A removably secured to the underside thereof. The die members 38A are provided with depending portions or pins 40 arranged in the desired positions to coact with the particular blanks to be punched. The platform 25 on the carriage is similarly provided with holes 41 to pass 40 and the slugs punched from the blanks. The male die carrier 38 is connected to the carriage 11 by links 42 so that the die carrier and its rolls 39 travel longitudinally along the guide rails 8 as the carriage is reciprocated.

In order to bring the pins 40 of the male die into coacting relationship with the blank B and the platform 25, the inner plates 29 of the guide rails 8 are provided with downwardly and upwardly doubly inclined portions 43 near the outer ends of the guide rails. The rollers 39 may descend into these inclined portions or depressions and thus permit the male die carrier 38 and pins 40 to descend in slug ejecting position as is best illustrated in Figs. 6 and 9.

The rollers 39 on the male die carrier extend transversely over the tops of the blocking bars 31 and so are supported thereby in some positions of the blocking bars. In order to permit the rollers 39 to descend into the depressions 43 the blocking bars are provided with upwardly opening notches 44 spaced equally to the spacing of the rollers 39. On the advancing motion of the carriage 11 the lugs 36 thereon engage the previously described pins 32 and bring the notches 44 in the blockmg bars into vertical registry with the rollers 39. The

rollers are thus permitted to travel into the depressions 43 as shown in Figs. 9 and 6. Advancing motion of the carriage carries the blocking bar and rollers 39 upwardly and outwardly beyond the depressions 43 as is shown in Figs. 7 and 10. Throughout this motion the platform 25 and male die holder 38 have moved longitudinally in timed relationship with the blank B while the pins 40 have moved transversely toward and away from the blank to punch out the reject slugs 45 and move upwardly to clear the blank. The notches 44 in the blocking bars 31 have been moved forwardly out of registry with the inclined depressions 43. Retracting motion of the carriage 11 now starts to return the platform 25 and the male die holder 38 inwardly or rearwardly. The supporting rolls 39 of the male die holder roll along the upper edges of the blocking bars which now bridge the depressions 43 and the die pins 40 are retracted without interfering with the punched blank or the new incoming blank. Near the end of the retracting stroke of the carriage the inner lugs 36 on the platform 25 pick up the pins 34 at the inner ends of the blocking bars to move the blocking bars and the notches therein inwardly or backwardly beyond the depressions 43. During retracting motion of the carriage and the platform 25 the pinion on 26 meshes with the rack teeth 27 and operates through the one way clutch 26A to rotate the off-feeding rolls 17 and feed the blank B from the said end of the platform. In effect the blank remains longitudinally stationary while the platform retracts longitudinally from underneath the blank.

In order to collect the slugs punched from the blank by the pins 40 a coiled flexible apron 46 is rotatably supported on a cross shaft 47 and has its end secured as at 48 to the leading edge of the carriage 11 underneath the platform 25. As the platform and blank advance to bring the pins 40 into operative position the apron 46 rolls underneath the platform and is in position to catch the blank slugs as they fall from the platform. The end of the shaft 47 is provided with a spiral pulley 49 to which one end of a rope 50 is secured and as the carriage advances the rope is wound up around the pulley. The rope extends forwardly over a fixed idler pulley 51 and is returned to an anchor mounted on the side bar 12 of the carriage to advance and retract therewith. A coiled spring 53 takes up any inequalities in the length of the rope. Upon retracting motion of the carriage and the bracket 52 the upper reach of the rope 50 is drawn rearwardly to unroll the rope from the spiral pulley 49 and reroll the apron on the shaft 47. Blank slugs collected on the apron are thus moved rearwardly and off the rolled end of the apron where they may be collected on a belt conveyor 54 for discharge into a suitable collecting box 55 (see Fig. 1).

Desirably punched blanks are deposited by the off-feeding rolls 17 in a uniform stack and to facilitate accurate positioning of the sheets on the stack. The stack is desirably formed on a vertically adjustable pallet 56 positioned on cross bars 57 suspended underneath the leading end of the framework. The cross bars 57 are supported by chains 58 trained over longitudinally extending side shafts 59 and the shafts 59 are rotated in a step by step fashion by worms 60 on the cross shaft 61 to lower the platform as the height of the stack on the pallet increases. This stacking mechanism and support is old and so is not described in greater detail.

In order to control the rotation of the off-feeding rolls 27 by the one way clutch 26A, a friction brake 62 is mounted on the opposite end of the shaft 16 and carriage from the pinion 26 (see Fig. 3).

Lateral and longitudinal registry of the blanks on the platform 25 is accomplished by jogging fingers and apparatus which is old and therefore is not illustrated or described.

Having thus described my invention, what I claim to be new and desire to secure by Letters Patent is:

1. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, a conveyor positioned to deliver blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage and inclined upwardly along the retracted position of said carriage, a male die holder positioned over said platform and having rollers supported by said rails, a male die member removably connected to the bottom of said holder and having knock out members positioned to mate with the openings in said platform, link means connecting said die holder to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said holder and adapted to permit said rollers and the holder supported thereby to descend into slug punching coacting relationship With said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails and flush with the upper surfaces thereof, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, pins projecting transversely from said bars through slots provided therefor in said rails, lugs projecting from said carriage to engage part of said pins and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other lugs on said carriage positioned toengage others of pins to retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions, coacting off-feed rolls positioned at the leading edge of said platform, rack teeth on the underside of one of said rails, a pinion carried by one of said off-feed rolls coacting with said teeth, a one Way clutch connecting said pinion to said roll to drive said ofi-feed rolls to feed blanks forwardly from said platform on retracting motion of said carriage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is Wound positioned behind the advanced position of said platform, means for Winding said apron on said last roll upon retracting motion of said carriage, and a waste feed conveyor positioned to receive and carry away slugs falling from said apron roll.

2. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, a conveyor positioned to deliver blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage, a male die holder positioned over said platform and having rollers supported by said rails, a male die member removably connected to the bottom of said holder and having knock out members positioned to mate with the openings in said platform, means connecting said die holder to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said holder and adapted to permit said rollers and the holder supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, pins projecting transversely from said bars through slots provided therefor in said rails, lugs projecting from said carriage to engage part of said pins and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other lugs on said carriage positioned to engage others of pins to retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions, coacting offfeed rolls positioned at the leading edge of said platform, rack teeth on one of said rails, a pinion carried by one of said off-feed rolls coacting with said teeth, a one way clutch connecting said pinion to said roll to drive said off-feed rolls to feed blanks forwardly from said platform on retracting motion of said carriage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

3. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, a conveyor positioned to deliver blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and having knock out members positioned to mate with the openings in said platform, means connecting said die holder to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said holder and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said member, projections onlongitudinally spaced portions of said bars, lugs projecting from said carriage to engage part of said projections and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other lugs on said carriage positioned to engage others of projections to retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions, coacting off-feed rolls positioned at the leading edge of said platform, rack teeth on one side of said framework, a pinion carried by one of said off-feed rolls coacting with said teeth, a one Way clutch connecting said pinion to said roll to drive said off-feed rolls to feed blanks forwardly from said platform on retracting motion of said carriage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

4. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, means for delivering blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and having knock out members positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said holder and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said rollers extending over said blocking bars, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, means on said carriage adapted to engage and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other means on said carriage positioned to engage said bars to retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions, means positioned at the leading edge of said platform to feed blanks forwardly from said platform on retracting motion of said carirage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

5. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriageand having female die openings therein, means for delivering blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and having knock out members positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said holder and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said rollers extending over said blocking bars, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, means on said carriage adapted to engage and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other means on said carriage positioned to engage said bars to retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion, means to feed blanks forwardly from said platform on retracting motion of said carriage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

6. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, means for delivering blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said member and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, means on said carriage adapted to engage and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, other means on said carriage positioned to engage and retract said bars with said carriagc after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

7. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, means for delivering blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, downwardly and upwardly double inclined depressions in said rails near the advanced position of said carriage and said member and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, means on said carriage adapted to engage and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions, and other means on said carriage positioned to engage and retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions.

8. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, means positioned to deliver blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a male die member positioned over said platform and having knock out members positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, means for moving said die member downwardly and upwardly in response to advancing motion of said carriage near the advanced position of said carriage and said member and adapted to permit the die member to descend into slug punching coacting relationship with said platform, other means preventing downward movement of said die member during retracting motion of said carriage and said die member, means positioned to feed blanks forwardly from said platform on retracting motion of said carriage, a flexible apron having one end connected to said carriage and below the leading end of said platform, a roll on which said apron is wound positioned behind the advanced position of said platform, and means for winding said apron on said last roll upon retracting motion of said carriage.

9. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings therein, means positioned to deliver blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a male die member positioned over said platform and having knock out members positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, means for moving said die member downwardly and upwardly in response toadvancing motion of said carriage near the advanced position of said carriage and said member and adapted to permit the die member to descend into slug punching coacting relationship with said platform, other means preventing downward movement of said die member during retracting motion of said carriage and said die member, and means positioned to feed blanks forwardly from said platform on retracting motion of said carriage.

10. A machine for punching slugs from carton blanks comprising a reciprocable platform adapted to support a carton blank and having female die openings therein, means for moving said platform in advancing and retracting motions, a male die member having projections thereon adapted to project through said openings, means for reciprocating said male die member in registry with said platform, means for reciprocating said male die member toward and away from said platform during the advancing stroke of said member and said platform, and means connected to the leading edge of said platform and extensible and retractable therewith in spaced relationship below said platform to collect slugs pressed through the platform, said means arranged to discharge slugs in the retracted position of the means.

11. A machine for punching slugs from carton blanks comprising, a reciprocable platform adapted to support a carton blank and having female die openings therein, means for moving said platform in advancing and retracting motions, a male die member having projections thereon adapted to project through said openings, means for reciprocating said male die member in registry with said platform, means for reciprocating said male die member toward and away from said platform during the advancing stroke of said member and said platform, and means extensible and retractable in spaced relationship below said platform to collect slugs pressed therethrough, said means being adapted in its retracted position to discharge slugs collected thereon.

12. A machine for stripping slugs from carton blanks comprising, a reciprocable platform member adapted to support a carton blank and having slug stripping openings therein, a stripper member having stripper projections adapted to coact with said openings, means for reciprocating said members in timed longitudinally registered relationship, means for reciprocating said members relatively toward and away from each other, and means for actuating said last means during the advancing stroke of said members and for holding said members in relatively separated position during the longitudinally retracting stroke of said members, collecting means positioned in spaced relationship below said platform, and means for advancing and retracting said collecting means in timed relationship with said platform to collect slugs pressed through the platform, said collecting means being arranged to discharge slugs collected thereon in the retracted position of the collecting means.

13. A machine for stripping slugs from carton blanks comprising, a reciprocable platform member adapted to support a carton blank and having slug stripping openings therein, a stripper member having stripper projections adapted to coact with said openings, means for reciprocating said members in timed relationship, means for reciprocating said members relatively toward and away from each other, means for actuating said last means during the advancing stroke of said members and for holding said members in relatively separated position during the longitudinally retracting stroke of said members.

14. A machine for punching slugs from carton blanks comprising, a framework, a carriage reciprocable on said framework between advanced and retracted positions, a platform carried by said carriage and having female die openings rt herein, means for delivering blanks to said platform in the retracted position thereof, means for reciprocating said carriage, a pair of guide rails supported by said framework alongside the path of said carriage, a male die member positioned over said platform and having rollers supported by said rails and positioned to mate with the openings in said platform, means connecting said die member to said carriage for reciprocation therewith, depressions in said rails near the advanced position of said carriage and said member and adapted to permit said rollers and the member supported thereby to descend into slug punching coacting relationship with said platform and to return said die member into spaced relation with said platform, blocking bars longitudinally reciprocably mounted alongside said guide rails, said blocking bars having upwardly opening notches therein spaced equally to the rollers on said holder, and a lost motion reciprocating driving connection between said bars and said carriage adapted to engage and advance said bars with the notches therein in registry with said rollers whereby said holder and rollers will descend in passing said inclined depressions to engage and retract said bars with said carriage after said rollers have retracted out of registry with the notches in said bars whereby said bars support said rollers in retracting motion across and above said depressions.

15. A machine for stripping slugs from pre-cut blanks having slugs resulting from the cutting of the blanks, comprising a reciprocable carrier member adapted to support the pre-cut blanks in the flat and having openings therein registering with the slugs of the pre-cut blanks, a stripper member having stripping projections aligned with said slug openings, means for reciprocating said carrier and stripper members in timed relation, means for reciprocating said members relatively toward and away from each other in timed relation to the stroke of the carton carrier to actuate the stripper at the forward end of the stroke of the carrier member and to space the stripper member from the carrier member at the rear end of the stroke to permit positioning of the carton blanks on the carrier member, and a slug receiving panel operatively connected to said carrier member to receive the slugs discharged therethrough on the actuation of said stripper member and to discharge the slugs on the return stroke of the carrier member.

16. A machine for stripping slugs from pre-cut blanks having slugs resulting from the cutting of the blanks, comprising a reciprocable carrier member adapted to support the pre-cut blanks in the fiat and having openings therein registering with the slugs of the pre-cut blanks, a stripper member having stripping projections aligned with said slug openings, means for reciprocating said carrier and stripper members in timed relation, and means for reciprocating said members relatively toward and away from each other in timed relation to the stroke of the carton carrier to actuate the stripper at the forward end of the stroke of the carrier member and to space the stripper member from the carrier member at the rear end of the stroke to permit positioning of the carton blanks on the carrier member.

References Cited in the file of this patent UNITED STATES PATENTS 406,716 Fenner July 9, 1889 1,882,531 Ungar Oct. 11, 1932 2,615,376 Pelikan Oct. 28, 1952