US2420525A

US2420525A - Interfolding machine

Info

Publication number: US2420525A
Application number: US519895A
Authority: US
Inventors: James J Deloye
Original assignee: International Cellucotton Products Co
Current assignee: International Cellucotton Products Co
Priority date: 1944-01-27
Filing date: 1944-01-27
Publication date: 1947-05-13
Anticipated expiration: 1964-05-13

Description

May 13, 1947' J. J. Dl-:LoYE 2,420,525

INTERFOLDING MACH INE Filed Jan. 27, 1944 6 Sheets-Sheet l JAMES J.DELOYE ATTORNEYS May 13, 1947. y J J DELOYE 2,420,525

INTERFOLDING MACHINE Filed Jan. 27, 1944 6 Sheets-Sheet 2 ENTOR INV J. DELOYE AT TORNEYS May 13, 1947- J. J. DELOYE 2,420,525

INTERFOLDING MACHINE I ATTORNEYS May 13, 1947- J. J. 'DELOYE 2,420,525

. INTERFOLDING MACHINE Filed Jan. 27, 1944 6 Sheets-Sheet 4 f Hin-.Hin-

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' Eggs* i INVENTOR JAMES J.DELOYE/ ATTORNEYS May 13, 1947- J. J. DELOYE 2,420,525

INTERFOLDING MACHINE Filed Jan. 27, 1944 6 Sheets-Sheet 5 F n f L.I...ll l5 56 W3 MJL lo m|^- iml 10a... y 6 5i 53 5 T /f l I #7 I jf M12.

INVENTOR AT TORNEYS /4 (U JAMES JDELOYE 5 67 68 lf1 BY INTERFOLDING MACHINE Filed Jan. 27, 1944 6 Sheets-Sheet 6 INVENTOR JAMES J.DELOYE ATTORNEYS Patented May 13, 1947 INTERFOLDING MACHINE James J. Deloye, Neenah, Wis., assigner to International Cellucotton Products Company, Chicago, Ill., a corporation of Delaware Application January 27, 1944, Serial No. 519,895 8 Claims. (Cl. 164-68) This invention appertains to `interfolding machines and more particularly to a machine for cutting and folding thin, soft paper sheets, such as cleansing tissue. However, it is to be understood that the machine can be successfully used for cutting and interfolding other kinds of paper, such as, wax paper, crepe toweling, etc.

.Such machines usually embody an upper sheet cutting mechanism and a lower sheet interfolding and stacking mechanism (see my prior Patent #2,116,782, issued May 10, 1938). Webs of paper are fed to the cutting mechanism and the webs are so cut that the resulting sheets are staggeredly arranged relative to one another, but in facing relation. A desired number of the interfolded sheets are packed in dispensing cartons and upon the withdrawal of one sheet from the carton, the next sheet 'follows so .that it can be conveniently withdrawn from the carton.

When the sheets leave the cutting mechanism they are united at spaced points by bonds or connecting tabs, and hence the sheets are still. more or less, in the nature of a continuous web. This bond.v insures the proper travel of the sheets from the cutting mechanism to the interfolding mechanism. The Withdrawal of a sheet from its carton is supposed to break this bond, but in actual practice, the bond often fails to break resulting in the withdrawal of more than one sheet from the-carton. This is decidedly vobjectionable to the user. Where the cutting knives are dull and the sheets are not cleanly severed, this condition is greatly aggravated. Hence, it is highly advantageous that the bonds between the sheets be broken before the sheets are interfolded.

It has been proposed to sever the sheets straight across and to eliminate the bonds and .to feed the sheets in close relation to the interiolding mechanism by rollers having pins which pierce the sheets, so that the sheets cannot get out of alignment or their proper close relation. However, the pin pricks in the sheets are objectionable, particularly with wax paper. In actual practice. the elimination of bonds is difcult due to the fact that the anvil insertion in the anvil rolls is made in sections (to permit adjustment and to prevent bowing of a long anvil insert) and where the sections meet, however close the arrangement, the paper will not be severed by the knives at the meeting points of the anvil sections, resulting in the forming of bonds.

It is therefore, one of the primary objects of my present invention to provide a novel device arranged between the cutting mechanism and the interfolding mechanism for effectively breaking the bonds between adjacent sheets, whereby to insure the correct withdrawal of only one sheet at a time from the dispensing carton.

Another salient; object of my invention is to provide a novel device which will receive the `sheets from the sheet stripping and guiding members of the cutting mechanism and break lthe bonds and properly deliver the sheets in close vedge to edge relation to the interfolding mechanism, the construction being such that the sheets will travel in a straight path from the cutting mechanism to the interiolding mechanism.

A further important object of my invention is to provide novel means for increasing the tension on the sheets at proper timed intervals for momentarily gripping the sheets and simultaneously exerting a pull on the sheets for breaking the bonds between the sheets.

A further important object of my invention is to provide a novel Ibond breaking mechanism which will receive the staggeredly arranged facing sheets from the cutting mechanism and simultaneously break the bond between the pairs of the staggeredly arranged sheets.

A still further important object of my invention is to provide a novel bond breaking mechanism. which can be readily incorporated with an interfolding machine of the type shown in my mentioned patent without any material change thereto and which willoperate efficiently and in proper timed relation to the cutting and interfolding mechanism thereof.

A still further object of my invention is to provide a bond breaking mechanism which will operate eiliciently with the interfolding mechanism shown in my mentioned patent or rotary interfolding mechanism of the type shown in the Christman patent, #1,761,517, issued June 3, 1930.

With these and other objects in view, the invention consists in the novel construction, arrangement, and formation of parts as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a fragmentary, vertical, sectional view illustrating my novel bond breaking mechanism incorporated with a sheet cutting and interfolding mechanism, the cutting mechanism shown being of the type illustrated in my mentioned patent and the interfolding mechanism being of the type shown in the Christman patent.

Figure 2 is a fragmentary, side, elevational view of my interfolding machine with the novel bond breaking mechanism, the-view illustrating the drive for the bond breaking mechanism.

Figure 3 is a plan view of one of the cutting rolls with parts thereof broken away and in section. to illustrate structural detail.

Figure 4 is a transverse, sectional view through the cutting roll taken onthe line 4-4 of Figure 3 looking in the direction of the arrows illustrating my adjusting mechanism for the cutting knives. v f

Figure 5 is a fragmentary, longitudinal, sectional view through the cutting roll taken on the line 5-5 of Figure 4 looking in the direction of the arrows, illustratingthe novel mechanism for individually adjusting the knives.

Figure 6 is a transverse, sectional view through one of the anvil rolls taken on the line 6-8 of Figurefl, looking in the direction of the arrows.

Figure '1 is a fragmentary, plan view of one of the anvil rolls.

Figure 8 is a vertical, sectionalview taken on the line 8-8 of Figure 1, looking in the direction of the arrows illustrating a part oi' my novel bond breaking mechanism.

Figure 9 is a fragmentary, detail, sectional view taken on the line 9--9 of Figure 2 looking in the direction of the arrows illustrating one of the outer guide rolls for the guide belts for the sheets. Figure 10 is an enlarged, fragmentary, detail, transverse, sectional view through the bond l `breaking mechanism, the section being taken on :the line Ill-I0 of Figure 9 looking in the direction of the arrows, the sheet stripping and guiding members of the sheet cutting mechanism being omitted to illustrate clearly the arrangement of the guide belts and the rolls of the bond breaking mechanism.

Figure 11 is an enlarged, fragmentary, detail, sectional view taken on the line I I-I I of Figure 8 looking in the direction of the arrows illustrating the resilient mounting of one of the upper feed- Aing and tension rolls of the bond breaking mechafolding machine and this machine embodies an upper cutting mechanism C, a lower interfolding and stacking mechanism S and the novel intermediate bond breaking mechanism T.

As stated, the cutting mechanism C is of the same general character as shown in my prior patent and hence this mechanism will not be described inminute detail. At this point, however, it is to be noted that certain improvements in the cutting rolls have been made, as will be later set forth.

The cutting mechanism C embodies a frame 4 I 5 in which is iournaled a pair of like cutting rolls I8 and I1 and a pair of like anvil rolls I6 and I 9. The cutting roll I1 cooperates with the anvil roll I9 while the cutting roll I6 cooperates with the anvil roll I8 and the surface speed of all of these rolls is equal. It is to be noted that the anvil rolls I 8 and I9 are arranged in facing relation, while the cutting rolls I6 and I1 are spaced with their longitudinal axis spaced a greater distance from the transverse center of the frame than the axis of the anvil rollers I8 and I9 so that the cutter rolls will not contact. A web of paper 20 is fed over the anvil roll I9 between this roll and the cutter roll I1 by guide and feeder rolls 2i. A similar web of paper 22 is fed between the cutter roll I6 and the anvil roll I8 by guide and feeder rolls 23. The

webs

20 and 22 are slit longitudinally by

sliter knives

24 and 25. Thus it can be seen that the webs 2U and 22 are first cut and are then fed downwardly between the anvil rolls I8 and I9. The relation of the rolls I1 and I9 to the rolls I6 and I8 is such that when the web 20 is being cut by the rolls I1 and I9, the rolls I6 and I9 will not be cuttingI the web 22, and consequently. as the sheets are'A and I1, it can be seen that each embodies a cast iron or like body 26 keyed or otherwise fastened respectively to drive

shafts

21 and 28. Each one of the bodies 26 has formed on its opposite sides longitudinally extending slotted ribs 29 in which are fitted sectional paper cutting knives 30. The sections of the knives are held against outward movement by adjustable blocks 3| and set screws 32 are provided for adjusting these blocks. Each section of the cutting knives is supported on a pair of cams 33 which are formed on or secured to cam shafts 34 rotatably mounted transversely in the ribs 29. The outer ends of the cam shafts are provided with polygonal heads 35 whereby the same can be conveniently turned so as to adjust theposition of the cams 33 against the knife sections 30 whereby the sections can be accurately adjusted relative to themselves and to the anvil roll. The cam shafts 3l can be held in an adjusted position by means of nuts 36 threaded on the cam shafts and obviously these nuts can be threaded into binding contact with the ribs 29. Hence, by adjusting the blocks 3| and the cam shafts. fine accurate settings of the knife sections are insured. By having the knives in sections, a long continuous knife is eliminated and it has been found that in using a long knife, the same has a tendency to bcw and accurate adjustment throughout its entire length is diillcult.

The anvil rolls I8 and I9 are also identical in construction and each include a cylindrical body 31. The bodies 31 of the anvil rolls I8 and I9 are keyed or otherwise secured respectively to their drive shafts 38 and 39. Each cylindrical body 31 of the anvil rolls is provided on opposite sides with longitudinally extending grooves 40 in which are fitted sectional anvil blocks 4I which can be formed of tool steel. These blocks can be held in place in any desired way, such as by the use of set screws 42. After the anvil blocks are fitted in place, the outer faces thereof are honed perfectly smooth with the outer face of the anvil roll bodies 31. These anvil blocks are placed with their ends in close relation and by having anvil blocks in lieu of a continuous anvil strip, bowing of such a strip is eliminated.

The cut sheets travel down between the facing anvil rolls I8 and I9 through the bond breaking mechanism T to the interfolding mechanism S.

In view of the fact that anvil blocks 4| are utilized instead of a continuous anvil strip, the paper webs will not be severed completely across, but will be united by bonds or tabs at the points where the anvil blocks abut one another. This is due to the fact that the knives 30 will not cut clean through the webs at the points where the anvil blocks 4| abut, due to the slight space between the blocks, and the knives not bearing on the anvil blocks at these spaces, cannot make a complete cut.

The interfolding mechanism S has'been shown to be of the rotary type and can be considered as of the same construction shown in the Christman patent mentioned. However, I do not limit myself to the exact construction shown in the Christman patent, as other types of rotary interfolcling mechanism can be employed, such as that shown in the Campbell Patent, #1,871,301, issued August 9, 1932, or the Brown et a1. patent, #1,219,239, issued March 13, 1917. In lieu of providing. thev rotary interfolding mechanism, I can utilize an interfolding lmechanism D (see Figure 13) of the same type as shbwn in my mentioned patent. '.1

As the rotary interfolding mechanism S is the same as the Christman patent, the same will not be described in detail, but it is to be noted that the same includes a supporting frame 43 in which is rotatably mounted the interfolding rollers 44 and 45 and strippers 46 receive the interfolded sheets from the rolls. The rolls are keyed or otherwise secured respectively to

shafts

41 and 48.

Now referring specifically to my novel bond breaking mechanism T, it will be noted that the same includes a frame 49 and this frame is securely fastened to the frames I and 43 so that a single unitary machine is provided. Obviously, the frames I5, 43, and 49 can be made as a single unit. In other Words, independent frames I5, 43, and 49 do not have to be provided. The novel bond breaking mechanism also includes a pair of upper facing top guide and pressure rolls 50 and 5| and these rolls are keyed or otherwise secured respectively to

shafts

52 and 53. The shafts are journaled in suitable bearings carried by the frame 49 and either one, or both of the shafts,

can be mounted so that the

rolls

50 and 5| can move relative to one another. As shown, the shaft 53 has its bearing blocks 54 slidably mounted and springs 55 engage the bearing blocks so as to normally urge the bearing blocks and the roll 5| toward the roll 58. 'I'hese rolls 59 and 5| have knurled faces for engaging the paper sheets and the rolls are normally so spaced that the sheets will not be gripped by the rolls with tension. Hence the points on the peripheries of the rolls will engage the sheets to feed the same downwardly. The rolls are normally spaced the correct distance by

cam discs

56 and 51 which are fastened to the

shafts

52 and 53. The peripheries of the

cam discs

56 and 51 have cam indentations 58 formed in their peripheries. Hence, when these indentations'xneet, the springs 55 will function to force the roll 5| toward the roll 58 andthe paper sheets will be momentarily gripped by the

rolls

58 and 5|.

Arranged below the guide and gripping rolls 5D and 5I are the bond breaking rolls 59 and 6l) and these rolls have formedr on their peripheries sheet gripping and pulling lugs 6| and these lugs 6I meet to grip and pull the sheets at the exact time the cam indentations 58 on the discs 56 ride lil) into contact. The bond breaking rolls 59 and 50 are keyed or otherwise secured respectively to

shafts

82 and 63 and these shafts are journaled: in suitable bearing blocks 64 mounted on the frame 49. By referring to Figures 1 and 10, it can be seen that the facing sheets are fed straight downwardly between the rolls 58 and 5I, the

rolls

59 and 68 to the feed rolls 55 and 86 which deliver the sheets to the rotary interfolding mechanism S. The feeding rolls 65 and 66 are vkeyed or otherwise secured to

shafts

61 and 68 mounted in bearing blocks 69.

The sheets are efciently guided and held straight in their travel through the bond breaking mechanism T by a series of belts 10 and these belts are received in grooves formed in the

rolls

58 and 5|, the

rolls

59 and 60, and the

rolls

65 and 66. The guide belts 10 are also received in grooves formed in guide rolls 1| and 12. These rolls 1| and 12 are mounted on opposite sides of the bond breaking rolls and are keyed or otherwise secured to shafts 13 and 14 rotatably mounted in suitable bearings carried by the frame 49. I

All of the mentioned rolls of the bond breaking mechanism are driven at the same speed of rotation but substantially twice as fast as the cutting and anvil rolls. The circumference of the anvil rolls is twice the circumference of the rolls of the bond breaking mechanism so that the surface speed of the rolls of the bond breaking mechanism is the same as that of the cutter rolls and the same as the speed of travel of the webs. i

The cutting mechanism C also includes paper stripping and guide means 15 and this means is identical in construction with the means numbered I5 to |24 in the mentioned Deloye patent. The rolls and 5I of the bond breaking mechanism are also provided with grooves 16 which receive the depending fingers 11 of said guide means 15.

Paper stripping and guide lingers 18 are also provided for the rolls and 66 and these rolls and 68 are also provided with grooves 19 for receiving the guide fingers 18. extend down toward the interfolding rolls 44 and 45 and insure the proper delivery of the cut paper sheets to said interfolding rolls.

yIn Figure 2 I have illustrated one preferred type of mechanism for driving the various parts of the cutting, interfolding, and lbond breaking mechanism in `timed relation relative to one another. This drive mechanism includes a main drive shaft 88 which can be driven from a chain or the like 8| from a drive motor (not shown). The shaft 8|) has keyed or otherwise secured thereto a pair of

sprocket wheels

82 and 83 and the sprocket Wheel 82 has trained thereabout a drive sprocket chain 84 leading up to the cutting mechanism. The sprocket Wheel 83 has trained tbereabout a drive sprocket chain 85 which is trained over a sprocket wheel 86 keyed or other- Wise secured to the shaft 48 of the inter-folding mechanism. The

shafts

41 and 48 are driven at the same speed through intermeshing gears 81 and 88 keyed or otherwise secured respectively to said

shafts

41 and 48. Consequently, the interfoding mechanism S is driven from the drive shaft BIL Fastened to the shaft 39 of the anvil roll I9 is a relatively large sprocket wheel 88 and the chain 84 leading from the drive shaft 89 is trained around said sprocket wheel88. All of the

shafts

21, 28, 38 and 39 have keyed thereto gear wheels 89 of equal diameter and the gear wheels 89 of the shafts 38 and 39 intermesh so The fingers 18 that the roll I8 will be driven from the roll I9. 'I'he gears of the

shafts

28 and 39 intermesh and hence the cutting roll I1 will be driven from the shaft 39. The gears of the shafts 21 and 38 intermesh and consequently the cutting roll Iiiv have trained thereabout a drive sprocket chain 93.

The shafts 13 and 14 have also keyed thereon respectively

sprocketV wheels

94 and 95. The sprocket wheel 9| has trained thereabout a drive sprocket chain 96 which is also trained over a sprocket wheel 91 keyed to the shaft 98 of the cutting mechanism. The sprocket wheel 95 has trained thereabout a drive sprocket chain 98 which is also trained over a sprocketwheel99 keyed to the shaft 39 of the cutting mechanism.

Fromthe foregoing, the drive for the various Darts of'the machine will be clear and all of the parts are driven in proper timed relation. The drive for the

paper webs

20 and 22 andthe drive for the slitting mechanism has not been described as the same are driven in an identical manner with the Deloye patent.

In operation of my novel interfolding machine the

paper webs

28 and 22 are fed over the cutting rolls I8 and I9 and the webs are alternately cut and the staggeredly arranged facing sheets are fed between the rolls I8 and I9 down to the bond breaking mechanism T. When the low parts 58 of the

cam discs

56 and 51 of the uppermost rolls 50 and 5| register with each other, the spring mounted roll 5| will move inwardly toward the roll 50 and the sheets will be momentarily gripped. At this time the pulling ribs 6| (see Figure 10) of the

intermediate rolls

59 and 6|) will be brought toward one another into pulling contact with the sheets and the sheets will be pulled down and the bonds in the web portions extending from the pair of

rolls

50 and 5| to the pair of

rolls

59 and 60 will be broken due to the web pulling effect of the lugs or ribs 6| which have a surface Speed slightly greater than the surface speed of the

rolls

50 and 5| and the bottom rolls 59 and 60. This additional surface speed of the breaker roll ribs SI is, of course, due to the relatively increased radius of the said rib portions of the breaker rolls.

It will be seen that each time that the pulling rolls grip the webs, each of the webs will have a line of severance with its interrupting bonds located in the web length between the upper roll pair and the breaker roll pair. This follows from the above explained relationship between the speeds and sizes of the cutting rolls and bond breaking mechanism rolls. In Fig. 10, a line of severance in the web is indicated at 20a and a. line of severance in the web 22 is indicated at 22a. Since the.

intermediate rolls

59 and 60 make one turn for each sheet'l length between successive lines of severance, the bond breaking operation will repeatedly occur when lines of severance are in the positions of the

lines

20a and 22a. Hence, it will be seen that each bond breaking operation simultaneously breaks the bonds in two relatively staggered lines of severance and stretching of the web material is avoided.

Incident to the breaking of the bonds, the

sheets below the

rolls

59 and 80 will be slightly rippled due to the increased surface speed of the lugs. This is hardly noticeable to the eye. but is advantageous to the successful operation of the machine in that edge to edge abutting relation of the severed sheets is insured. The severed sheets are now continuously fed down by the rolls 65 and Si to the interfolding mechanism 8 where the same are stacked by the stripping mechanism Ii. The interfolded sheets can now be packed in the cartons.

With my invention, the sheets are completely separated from one another and hence one sheet can be easily withdrawn from the carton without danger of withdrawing another sheet therewith. However. due to the fact that the sheets are interfolded, as one sheet is drawn from the carton, the adjacent sheet will be positioned for convenient withdrawal.

In Figure 13 I have shown the interfolding mechanism D which, as stated, is of the same type as shown in my prior patent and hence this interfolding mechanism D will not be described in detail. It is to be noted, however, that this mechanism includes gripping jaw sets and |0| and cooperating tucker blades |02 and |03. The gripping jaws III and IUI travel in elliptical paths. The view has been shown so as to clearly bring out the fact that my novel bond breaking mechanism T can be'successfully used with various types of interfolding mechanisms,

Changes in details may be made without departing from the spirit or the scope of my invention, but what I claim as new is:

1. In a paper sheet interfolding machine, a sheet feeding and bond breaking mechanism comprising a pair of sheet feeding and gripping rolls and a pair of bond breaking rolls, means for drivfing said rolls at the same speed, means normally urging at least one of the first mentioned rolls toward the other, discs on said rst mentioned pair of rolls normally holding said rolls spaced for feeding sheets, said discs having cam indentations whereby upon aligning of said indentations the rolls will momentarily grip said sheets, and peripheral bond breaking lugs on said second mentioned pair of mils lfor engaging said sheets at the same time the indentations on the discs align.

2. In a paper sheet interfolding machine, a

mechanism for feeding sheets and for breaking bonds between the sheets including an upper pair of sheet feeding and gripping rolls, a lower pair of sheet feeding rolls. and an intermediate pair of sheet engaging rolls, means for driving all of said rolls at the same speed, means normally urging at least one of said upper rolls toward the other roll, discs on said upper rolls normally holding the upper rolls spaced for properly feeding the sheets, said discs having cam indentations adapted to meet for permitting said rolls to momentarily grip the sheets, and radially extending peripheral paper pulling and breaking lugs on the intermediate rolls adapted to engage the sheets at th'e same time the upper pair of rolls grip the sheets.

3. In a paper sheet interfolding machine, a mechanism for feeding sheets and for breaking bonds between the sheets including an upper pair of sheet feeding and gripping rolls, a lower pair of sheet feeding rolls, and an intermediate pair of sheet engaging rolls, means for driving all of said rolls at the same speed, means normally urging at least one of said upper rolls toward the other roll, discs on said upper rolls normally holding the upper rolls spaced for properly feeding the sheets, said discs having cam indentations adapted to meet for permitting said rolls to momentarily grip the sheets, andradially extending peripheral paper pulling and breaking lugs on the intermediate rolls adapted to engage the sheets at the `same time the upper pair of rolls grip the sheets, and paper feeding belts trained about said rolls, said rolls having peripheral grooves for receiving the belts, and said belts having abutting vertical runs for engaging the sheets.

4. In a machine of the class described, mechanism for almost completely transversely severing a paper web at longitudinally spaced intervals,

.means for feeding the web to said severing means including a cutting roll having a longitudinal groove, sectional cutting knives fitted in the groove, and means for independently adjusting the sections of the knives radially of therolls including rotatable cams engaging the inner edges of the sections of the knives.

5. In a machine of the class described, mechanism for almost completely transversely severing a paper web at longitudinally. spaced intervals, means for feeding the web'to said severing means including a cutting roll having a longitudinal groove, sectional cutting knives fitted in the groove, and means for independently adjusting the sections of the knives radially of the rolls including rotatable cams engaging the inner edges of the sections of the knives, and means for locking the cams in an adjusted position.

6. In a machine of th'e class described, meansy for transversely partially severing a pair of paper Webs in such a manner as to divide the webs into a series of sheet areas having interconnecting bonds, means for continuously feeding said partially severed paper webs into face-to-face relation with the lines of severance and bonds in one web in staggered relation to the lines of severance and bonds in the other and continuing the travel of said webs in said face-to-face relation, vand bond-breaking mechanism comprising a pair of web guiding and holding rolls driven at the same surface speed as the speed at which said webs are fed, web feed accelerating means adapted to receive said webs from said rolls and spaced therefrom a distance in excess of the distance between the succeeding staggered lines of' severance in said face-to-face webs but less than the distance between successive lines of `severance in the respective webs, said Web feed accelerating means comprising web gripping means driven so as to cause the web portions gripped thereby to travel at a higher speed than the normal speed of travel of said webs, said web gripping means being timed to grip and accelerate the travel of said webs when there is a line of severance and bonds in each of the webs Within the web length extending from said holding rolls to said accelerating means, thereby to simultaneously break the bonds in a pair of staggered lines of severance in said webs, and a pair of web feeding rolls for receiving said webs from said web feed accelerating means and continuing the feed of said web at the same speed as said first mentioned web feeding means.

7. In a machine of the class described, means for transversely partially severing a pair of paper webs in such a manner as to divide the webs into a series of sheet areas having interconnecting bonds, means for continuously feeding said partially severed paper webs into face-to-face relation with the lines of severance and bonds in one ance and bonds in the other and continuing the travel of said webs in said face-to-face relation,

and bond-breaking mechanism comprising a pair of web guiding and Aholding rolls driven at the same surface speed as the speed at which said webs are fed, roll spacing means normally holding said rolls 'in such spaced relation as to prevent the application by said rolls of substantial pressure onsaid webs and operative, once in each turn of said rolls, to cause the same `to momentarily grip said webs so as to prevent slippage thereof between said rolls, web feed accelerating means adapted to receive said webs from said rolls and spaced therefrom a distance in excess of the distance between the succeeding staggered lines of severance in said face-to-face webs but less than the distance between successive lines of severance in the respective webs, said web feed accelerating means comprising web gripping means driven so as to cause the web portions gripped thereby to travel at a higher speed than the normal speed of travel of said webs, said roll `spacing means and web gripping means being respectively timed to simultaneously grip said webs and to accelerate the travel thereof when there is a line of severance and bonds in each of the webs within the web length extending from said holding rolls to said accelerating means, thereby to simultaneously break the bonds ln a pair of staggered lines of severance in said webs,

and a pair of web feeding rolls for receiving said webs from said web feed accelerating means and continuing the feed of said web at the same speed as said first mentioned web feeding means.

8. In a machine of the class described, means for transversely partially severing a pair of paper Webs in such a manner as to divide the webs into a series of sheet areas having interconnecting bonds, means for continuously feeding said partially severed paper webs into face-to-face relation with the lines of severance and bonds in one web in staggered relation to the lines of sever-` ance and bonds in the other and continuing the travel of said webs in said face-to-face relation, and bond-breaking mechanism comprising a pair of web guiding and holdingrolls driven at the same surface speed as the speed at which said Webs are fed, roll spacing means normally holding l*said rolls in such spaced relation as to prevent the application by said rolls of substantial pressure on said webs and operative, once in each turn of said rolls, to cause the same to momentarily grip said webs so as to prevent slippage thereof between said rolls, rotary web feed accelerating means adapted to receive said Webs from said rolls and spaced therefrom a distance in excess of the distance between the succeeding staggered lines of severance in said face-to-face Webs but less than the distance between successive lines of severance in the respective webs, said web feed accelerating means comprising a pair of oppositely rotating members having cooperating web gripping portions rotated so as to cause said web gripping portions to travel at a higher speed than the normal speed of travel of said webs, said roll spacing means and web gripping portions being respectively timed to simultaneously grip said webs and to accelerate the travel thereof when there is a line of severance and bonds in each of the webs within the web length extending from said holding rolls to said accelerating means, thereby to simultaneously break the bonds in a pair of staggered lines of severance in said Webs, and a pair of web feeding rolls for receiving said The following references are of record in the JAMES J. DEnoYE.

REFERENCES CITED le of this patent:

UNITED STATES PATENTS Number Name Date Sandberg May 12, 1942 Number 12 Name Date Copeland Dec. 30, 1941 Ratchtord Sept. 7, 1943 O'Connell Mar. 21, 1944 Aiken Dec. 1, 1936 Moritz Nov. 28, 1939 Deloye May 10, 1938' Christman June. 3, 1930 Winter Dec. 11, 1923 Stanton Nov. 1, 1932 Straubel May 12, 1931 Straubel July 18. 1922