US2698662A - Automatic papercutter - Google Patents

Description

Jan. 4, 1955 E. L. MOODY 2,698,662

AUTOMATIC PAPERCUTTER Filed May 14, 1951 2 Sheets-Sheet 1 L, 70v Edd/e L. Moody no 116 INVENTOR.

Q Q" BY I 54 Jan. 4, 1955 E. MOODY AUTOMATIC PAPERCUTTER 2 Sheets-Sheet 2 Filed May 14, 1951 Edd/e L. Moody INVENTOR.

BY dug-Kym .known processing methods from United States Patent AUTOMATIC PAPERCUTTER Eddie L; Moody; PelisacolafFla'i Application May 14', 1951;" Serial No. 226123.

IZCIaimS. -(C]..-164-'-73) I This invention. relates tto=a tailcutting device adapted for. use in .a continuous winding operation to severand transfer a travelingweb from a full roll'on a winder-or rcelato .an .emtyp core.

A primaryrobject. of this invention.residesin .a device as :set forth .in .theupreceding. .paragraph which will cut through .or pierce the. surface of a conveyed sheet thereby forming a tailor a narrow strip of paper for the. purpose of transferring. or feeding. the entiresheetof paper from onesection of the machine,cor:reel,.-to the next.-

Another object. of this.invention:is to provide a device as set forth hereinabove which, after producing a sufiicient length of tail ornarrow strip 'of-papenuwilltmove transversely .of the .conveyedt'sheet to sever .the' remaining portion of thesame,

An important feature. of this. invention is .the .pro* vision of a knife which is controlledibothialonga vertical axis and a horizontal axis.and,..accordingly, which will be thrust into the;sheet andsubsequently carried transversely of the sheet,;the. entirezoperating. means comprising. an electrical device.

Other objects-and. advantagesiof this invention will be come apparent from the followingdescription when taken inconjunction with the accompanying claims and;drawin s.

iKeferring. tothe .draWings,:-in .whichis shown. a preferred embodiment of the invention; it will'tbe notedthat:

Figure'l is .a perspective view-of a sheet being conveyed as it would; be inzthe: manufacturemf paper .over the conventional presssrollsand' intoa paperreceiving reel.-

Figure 2 is a vertical sectional .side' viewrshowing the entire apparatuscomprising the instantrinvention'.

Figure. 3 is a rear view illustrating theknife blade and supporting carriage and track with the outer casing removed.

Figure 4 is .a top fragmentary view. illustratinga por-- tion of the track, the controlling mOtOI ,Yfll'ld'ililflitlSWitCh, the; blade or knife. structure being; removed.

Figure 5 is a side view of the. knife .and supporting carriage showing portionsiofthe knife operating structure in section.

Figure-6 is a perspective-detailview illustrating. the immediate supporting. means. for the knifeiblade. x

Figure 7 is an electrical schematic diagram of the circuit for controllingthe operation of :the instant invention.

Figure 8' is a top fragmentary view illustrating the-manner. in which the knife bladesevers the .conveyedsheet.

Referring. now more specifically to the accompanying drawings; it will be noted that the numeral l0s-shows in general aportion oft-the conveying apparatus which is employed in the-manufacture of paper'and includes a rotating drumslli Disposed'beneath. the surface of the conveyed sheet 12 is thecutting device 14-whichcomprises the subject matter. of theinstantinvention.

The. probleminvolved in.this invention is that of transferring. a sheetofpaper-which is undergoing wella full reel-v to an empty one without-disturbing. the continuous movement of the conveyed sheet. stoppingtheconveyor :necessitates :the: initial threading" of a narrow. marginal. stripzof .the .sheet; which: strip has naturally?v been severedafrom the ;.remainder.:of the sheet. Oncethe-narrowstrip has been :StflltfidiOIL' a new reel -.(.in theninstant-tinventionu'by somevmanualzmeans),

To accomplishrsuch' a result without See the rest of-the; sheet is s'evered along an angle; thereby gradually feeding moreandmoreofthe sheet onto the newreel until finally, after the entire sheethas -beencom pletely severed, a complete transfer has been effected.

With this briefintroductionwit should be understood thatl-somestructural means has:to be provided 'whiehwill thrusha knife-blade into the: surface of the-conveyed sheet alongits marginal edge; allowing the paper -to travel forward relative to:the:knife:blade; thereby cutting-a narrowtstrip,..and finally the structural meansmust include a devicefor carrying. the knife blade-transversely of the sheet, whereby complete severance .may occur.

Withiireferen'ceto Figure. 2,i t will be noted thatthere appears itwoelongateditubular. members 16 and 18;. one overlying :the. other, and. both being: supported bya pair of adjustable. standard members 20 and 22.: J Each of these tubes is hollow throughoutaandthe upper tube--16 ispr0- vided with a longitudinal. slot 24 :Which extends substantiallylhroughout.itszentire length. Slidable within the; uppertube 16 is a cylindriealmember 26 providing the bearing element for the movable-carriage denotedogenerally by :thei numeral 28. The hollow .interiorof-lthe tube 16 provides a trackalong which or through which the cylinder 26 may travel. Resting .onthBiCy1iI1d6L=26-iS a base member 30'having suitable-upstanding. bracket-members :32.-disposed along the lateral edges thereof... Extending both forwardly and-rearwardly of:.the: base member 30 is a bar 34 carrying at the outer end. a conventional sprocket wheel 36. -A standard38 is disposed. mediallycof the: base :member 30' and extends vertically.:upward. Thisrstandard 38 -is provided Witha largeaslotzorsaperture.40 positioned ina central areathereof and for .a purpose subsequentlyto be stated.

ThfifStI'LlCtUIGZOfIhfi: knife blade 42 and its immediate supporting parts are seenclearly-in- Figure '6. Accord mgly, it will .be noted.that1 the.- blade 42-is vertically pivotally mountedwithin a slot 44, normally resting at-an anglerelative to a vertical axis; As the illustration clearly shows,-.the:slot 44 is provided in apanel member 46 having any suitable configuration. :However, :the instant in vention does provide ameans for adjusting thea-ng'ularposition of'theplateAZand such :Will be seen-to be a bolt 48- threadedly received within a bore 50 in the panel memberg. The; panel z46 is pivotal'lyrmountedat 60-upon .an .angulatedl bracket :52 and is yieldingly maintained in a substantially longitudinal: :axis relative to the bracket 52. This-yielding or biasingimeans is accomplished by meanslof a spring. 54 connectingnthepanel 46 and the right-hand: of thenpanel. 46;:ras viewedin Figure 6, the knife blade42-may be-swivelled' or pivoted arounda ver- IICaLLHXIS through the;:joint,=as='occurs during-operation .as described'hereinafterr' With attention nowxbeing directedto Figures 2, 3. and 5, it will .be notedwthatthe; bracket 52 is providedwith=a pair of downwardlyadepending spaced :bearing members 62 and 64=and thatsthelsame embrace-therebetween the upper portion: of the standard 38. iAnarticulated-1inkage connects the bracket 52 .with the standa'rd 38 and is formed Thus, it will beseenifrom this arrangement that the knife blade maytb'e moved-or reciprocatedvertically by applying aforceat- 'a point subs'tantially Where the barsand 68 are jointly :connected.

Referringxmor'e particularly 'to Figures 2' and 4, it will beiLnoted-rthat-atoneend of the tubular track is a motor 701having its shaft in a horizontal 'plane and extending transversely through the tubular members. Substantially along the tangential line of contact between the upper and lower members--16"and'18=i's provided a slotof suitable dimensions to permit a rotating sprocket Wheel 72 tobe received -thereint The sprocket Wheel '72 is mounted upon the motor shaft and" carries' -thereon- 'a chain or belt 74." At the opposite-endof the tubular structure; a similar slot -'76 is provided between the upper and lower tubular members 16 and 18 and a sprocket wheel 78 is fixed upon a shaft 79, the latter being journa'led in suitable bearing members exteriorty of the tube, not shown.

'lhe chain 74 is threaded around the sprocket wheels 36 and also over a turther sprocket wheel 80 which is supported at the front of the standard '38 by means of suitable brackets. lt will be noted that the only break in the chain '14 is where the latter is connected to the bar 68 of the linkage mechanism. For this connection there is provided a pair or eyelets 82 extending at opposite sides of the bar 68. Lastly, as far as the path of the chain is concerned, it will be noted that between the sprocket 80 and the point where the chain 74 is connected to the eyelet 82, the chain must pass through the standard 36' and, accordingly, as previously described, an aperture 40 has been provided. A further feature should be noted in the provision of a lower stop means comprising an upstanding tubular member 84 whereby the downward slidable position of the knife 42 is prevented by an abutting contact between the bar 68 and the tubular stop 84.

As an encasing covering or shield for this entire mechanism, a housing member 86 is provided and the same is secured to the base 30 by a bolted connection to the upstanding bracket 32.

Considering now the electrical circuit for controlling the operation of the motor 70, it will be noted from Figure 7 that the motor 70 is a standard three-phase motor supplied with a magnetic brake 88, not to be considered as a part of this invention. As a means for controlling, and especially for reversing the direction of rotation of the motor 70, there is provided a standard three-phase reversing starter consisting essentially of two sets of magnetic contactors. Each set of contactors consists of four pairs of contacts and, as delineated by the dotted lines,

four of these pairs of contacts constitute the forward line starter 90 and the remaining four constitute the reverse line starter 92. in either set of contacts, three pairs of contacts, denoted by the numerals 94 and 96, are the contacts which connect the line voltage to the particular windings of the motor 70 while the remaining contact denoted by the numerals 98 and 100, in either case, is a means for interlocking its respective bank of contacts, as will subsequently be more clearly described.

At the left of the schematic diagram, there will be noted a plurality of push-button type switching elements constructed in a conventional manner to afford momentary contact. Without describing the operation of these pushbutton switches at the present time, their names will be enumerated for clarity in the subsequent discussion. Accordingly, the upper switch 102 is termed a jog button and will be used initially to raise or thrust the knife upwardly into the sheet of paper; immediately below the jog button is provided a run button 104 used when it is desired to move the carriage 28 across the track 24; next is a reversing switch 106; and lastly there is a stop button 108, the operation of these latter to be brought out more clearly in describing the operation of the device. It should be noted that all of the switches just described are normally in what will be termed the upper position, as seen in Figure 7, and that when the buttons are operated they will be in what will be termed the down position.

Illustrated in their normal positions are also four other switches which provide the actual mechanical-electrical relationship between the movement of the carriage 28 and the operation of the control circuit. These switches consist of a normally closed jog limit switch 110, a normally closed stop limit switch forward 112, a normally open automatic reversing limit switch 114, and, finally, a normally closed stop limit switch 116 reverse. Further, by referring to Figure 2, it will be noted that at the left end of the tubular track and mounted on a J-shaped bracket 118 is a spring-urged vertically pivoting arm 120. It should be understood at this point that the arm 120 controls the operation of two of the switches; namely 110 and 116. At the opposite end of the tubular track is a pair of arms 122 and 124, both mounted and operated similarly to the arm 120. However, in this latter case, the arm 122 controls the operation of the switch 112, opening it as the arm 122 is pushed downwardly and the arm 124 controls the operation of the switch 114, closing the same as the arm is pushed downwardly.

The operation of this device is as follows: The elements are positioned as i llustrated in Figure l and the motivating power for the conveying and reeling operation is begun, thus enabling the sheet 12 to assume a forward component or motion, as indicated by the arrow. Assuming that the sheet 12 has not been pierced by the knife blade 42 and that the core 126 has received a sunicient amount of paper to warrant transrerring the sheet 12 to the core and further assuming that the carriage 28 is positioned at the extreme left end, as viewed in Figure 2, of the tubular track whereby the arm 130 (Figure 3) extending laterally from the base 30 is holding the arm 120 in a downward position, the operation of the device may be commenced. l heretore, the og button 102 is depressed to the down position and thereby a circuit is established from line L through lead 132, through the closed switch 108, and upwardly along lead 134, through the contacts which are bridged by the switch 102 and thereby downwardly along lead 136 through the closed jog limit switch 110 and upwardly through lead 138, through the upper contacts bridged by the switch 106, and subsequently through lead 140 to the forward holding coil 142 through the contacts of a pair of overload relays 144 back to the other side of the line L the relays 144 having their operating coils connected in the leads for motor '10.

Energizing of the forward holding coil 142 as described closes the forward contactors 94 and 98 to energize the motor 70, which is shown as arranged to rotate the chain 74 in a clockwise manner, as seen in Figure 2, thereby moving the articulated linkage from an angulated position, as illustrated, to a straight position, as shown in the dotted lines of Figure 5. When the linkage has hit the standard 38, the latter comprising a stop means for the linkage, the knife blade 42 will be at its upper limit of travel and will, because of its position relative to the surface of the sheet 12, have pierced the sheet, as seen in Figure 1. it will be noted that in this position, the blade 42 will have a position which is parallel to the conveyed motion of the sheet 12, thereby permitting effective cutting action of the paper. Since the carriage 28 will move when the linkage mechanism hits the standard 38, some means is necessary to deenergize the motor 70 when such motion begins. Accordingly, at the very instant that the carriage 28 moves, it will be noted that the arm 130 will allow the arm 120 to pivot upwardly, and such action will open the switch 110, thereby deenergizing the motor 70. Under ordinary conditions, this action will never occur, since the operator pressing in on button 102 will generally release the button 102 before the carriage 28 begins to move.

With the knife in the upper position, a narrow strip 148 may be cut and the length of this marginal strip will be determined entirely according to the desire of the user. When such a desired length is reached, the operator manually tears the narrow strip along a transverse line, such as at 150. The portion 152 thus remaining may be threaded by any conventional means around the empty reel 128 and the same will assume a position indicated by the numeral 154.

When the desired amount of threaded strip 154 has been wound on the reel 128, the run button 104 is depressed to the down position. It will be noted that the circuit now energized is from line L through lead 132, the switch 108, the lead 134, the run button 104 down contacts through the upper contacts of the button 106 and thence through the forward holding coil 142, and thus back to the line L As similarly described, the motor 70 will be energized and now, since the linkage members 66 and 68 are abutting the standard 38, the chain 74 will draw the carriage 28 along the tubular track. It should be noted, however, that since the operator will release the button 104, some interlocked means must be provided to maintain the forward contactors in the closed position. Accordingly, the contactor 98 provides a circuit for the forward holding coil 142, as follows: From line L through lead 132 through the closed switch 108, upwardly through the lead 134, to the upper contacts of the jog button 102, through the lead 156 downwardly through the closed contacts of the stop limit switch forward 112 and thence uD- wardly through the lead 158 through the closed interlocked contactor 98 and thence through the forward holding coil 142 and back to the line L This movement of the carriage will complete the cutting of the web as indicated by the diagonal portion of the line 152 in Fig. 8, the diagonal direction of the cut being due to the forward movement of the web which takes place during the transverse movement of the carriage; r The swiveleurmounting of' the knife at 6.0.; as descrmediis a; material. aid .in. establishing properly: smooth eutungoperation, since while the knite 1s stationary and cnttingrtnezstrip 141$, it will be aligned parallel with the direction of weottravel. by the movement of the web, and during its transverse cutting stroke, the knife will naturally adJllSllitself to :theproper resultant angular position for the relative speeds of tnercarriage and web.

When the! arm at the forward end of the carriage, not shown, but-- similarto the arm 130, strikes the arm 122, therebydepressing the same, the switch contacts 112 will open, thereby deenergizing the circuit through the forward holding coil- 142. "the momentum of the carriage will carry it beyond thearm 12210 the arm 124 and when the latter is depressed thereby, the reversing limit switch 1-14 will beclosed, thereby energizing. the reverse holding coil'1'6tl. It. should be explained at this point that a manually operable switch 162isprovided in the event that it not desired to have the carriage automatically returned to thestarting'position'onceit has reached the extent of its forward'travelt Accordingly, a return and a nonreturnposition is provided for the switch. Therefore, when-the switch contacts 114 have closed and the switch ltii' is in the return position, the reverse holding coil Will-be-energized through a circuit from L through the leadhl'32, through the closed contacts of theswitch 103, throughthe return positionof switch 162, through lead 164 to the closed contacts of switch 114, and upwardly throughthe-lead 166, through the-reverse holding coil 160-,=and thence back to the line L This coil ltlwill close the bankof reverse line starter contactors 96 and 100-,-which, as will be clearly evident from the schematic diagram, reverse two of the phases of the three-phase motor7il, thereby reversing the direction of this motor.

Since theswitch 114 will open at the moment the carriagerbegins' its reverse travel, it is believed evident, as in the previous-explanation, that an interlock contact 300 is necessary to maintain a circuit for the reverse holding coil'lldfl. This latter circuit may be traced from the line Llthrough" the lead 132' down through the closed contacts 108', to the return post'of the switch 162, by-passlng the switch contact and proceeding through the lead 168 through the closed contacts of the stop limit switch reverse 116 and thence back through the interlock switch contacts ltlti'to the reverse holding coil 160 back to theline L When thercarriage reaches, the starting position, namely, when the arm 13d abuts the arm 120, thereby depressing the same,--the switch contacts 116 will be opened, thereby d'eenergizing the circuit through the reverse holding COll 160 previously traced.

Several refinements'on this circuit should be noted. When it is undesirable to have the carriage return automatically to the starting position, the switch 162 is thrown to the non-return. position and it is believed to be clearly evident that. no circuit .is provided for maintaining the reverse. holding. coil. 160 in an energized, state whenthis switch is placed in such a position. However, since it is necessary to provide some means for bringing, the carriage to thestarting position, a momentary-type push button switchltlfiis' provided. It'will be noted that if the carriage-is at. the forward extent of its travel, and if the motor 70 .is not energized, then if the switch contacts 106 are placed in the down position a circuit will be formed from the line L through the lead 132 to the closed contacts 108, to the now closed contacts of the switch 106 in its downiposition; thenceupwardly to the upper closed position of the switch 104 through the lead 170, and thence through the lead 166 to the reverse holding coil 160, and thencetback .to the line L Once again, when the switch 106218.161E21'S6d, the interlock contacts will maintain However, since numerous: modifications-and.equivalents will readily occurto those skilled. in the art after a consideration of the foregoing specification and accompanying drawings, it is not intended. to limit the invention to the exact embodiment shown anddescribed, but all suitable modifications and equivalents may be resorted 'to which fall within the scope of the appended claims,

Having described the invention, whatv is claimed as new is:-

1. A tail cutter. of the character described for a traveling Web' comprising a carriage, meansfor supporting said carriage adjacent said web for advance and return movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, means mounting said knife on said carriage for movement with said carriage and for movement with respect to said carriage between a retracted position out of the path of said web and a projected position penetrating said web, and operating means for effecting said movement of said knife on said carriage and for effecting said movement of said carriage in timed relation with said movement of said knife to cause said knife to penetrate said web while'said carriage is substantially stationary and thereafter to travel with said carriage transversely of said Web in cutting-relation with said web.

2. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said Web, a knife, means mounting said knife on said carriage for movement with said carriage and for movement with respect to said carriage between a retracted position out of the path of said web and a projected position penetrating said web, a drive for effecting sard movement of said carriage, and means forming 'a driving connection between said carriage and said drive responsive to actuation of said drive to shift said knife from said retracted to said projected position thereof for penetration of said web While said carriage is substantially stationary and thereafter to cause said carriage to travel transversely of said web with said knife in cutting relation with said web.

3. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said the-circuit through the reverse holding coil 160 until such time as-it reaches the initial position where the switch contacts 1-16flwill .open,.thereby-deenergizing the circuit.

Further, it is believed quite evident that if the momentary push button 108 is depressed, then the entire circuit will be precluded from obtaining line voltage, since every circuit must first be energized through the lead 132 from the line L Also, it is believed evident that the motor is protected by the overload relays 144 having their operating coils connected in the leads to the motor 70.

From the foregoing, it is believed that the construction and operation of this automatic paper cutter are readily apparent, and therefore further description is deemed unnecessary.

carriage adjacent said web for movement substantially paraliel to said web and transversely of the direction of travel of said web, a knife mounted on said carriage for movement between a retracted position out of the path of said web and aprojected position penetrating said web, means for, effecting said movementof said knife while holding said carriage substantially stationary to cause said knlfe to penetrate and slit said web lengthwise theroef, and means under the control of the operator and operable following said penetrating movement of said knife to effect sa d movement of said carriage causing said knife to travel with said carriage transversely of and in cutting relation with said web.

4-. A tail cutter of the character described for a traveling web compr1s1ng a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, means mounting said' knife on said carriage for movement with said carriage and for movement with respect to said carriage between a retracted position out of the path of said web and a projected position penetrating said web, operating means for effecting said movement of said knife on said carriage and for effecting said movement of said carriage in timed relation with said movement of said knife to cause said knife to penetrate said web while said carriage is substantially stationary and thereafter to travel with said carriage transversely of said web in cutting relation with said web, reversing means for causing return movement of said carriage to the starting position thereof following completion of the cutting of said web, and means responsive to operation of said reversing means for causing movement of said knife to said retracted position in advance of said return movement of said carriage to withdraw said knife from cutting relation with said web.

5. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, a support for said knife on said carriage forming a guide for movement of said knife between a retracted position out of the path of said web and a projected position penetrating said web, means on said carriage for moving said knife on said support between said positions thereof, said moving means being movable with respect to said carriage in opposite directions to effect said movement of said knife, a reversible drive, and means connecting said drive with said moving means for operation of said moving means upon actuation of said drive to cause said movement of said knife in advance of movement of said carriage.

6. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said Web, a knife, a support for said knife on said carriage forming a guide for movement of said knife between a retracted position out of the path of said web and a projected position penetrating said web, a reversible drive for said movement of said carriage, a lost motion connection between said drive and said carriage including means mounted for limited movement on said carriage in response to reversal of said drive, and means connecting said lost motion means with said knife to cause shifting of said knife between said positions thereof in response to reversing of said drive and in advance of movement of said carriage.

7. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for advance and return movement substantially parallel to said web and transversely of the direction of travel of said web, a knife supported on said carriage for movement between a retracted position out of the path of said web and a projected position penetrating said Web, a reversible drive for effecting said movement of said carriage, means connecting said drive with said carriage and said knife and responsive to actuation of said drive in the direction for advancing said carriage to project said knife into said web and thereafter to cause said knife to travel with said carriage transversely of and in cutting relation with said web, and said last named means being responsive to reversal of said drive to the direction for return of said carriage to retract said knife from said web in advance of return movement of said carriage.

8. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for advance and return movement substantially parallel to said web and transversely of the direction of travel of said web, a knife supported on said carriage for movement between a retracted position out of the path of said web and a projected position penetrating said web, a reversible drive for effecting said movement of said carriage, means connecting said drive with both said carriage and said knife and responsive to actuation of said drive in the direction for advancing said carriage to project said knife into penetrating relation with said web, means responsive to operation of said last named means for stopping said drive to hold said carriage substantially stationary causing said knife to slit said web, and means under the control of the operator for thereafter reactuating said drive to cause said knife and carriage to advance in cutting relation with said web.

9. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for advance and return movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, means including a toggle linkage forming a connection between said knife on said carriage and effective upon straightening thereof to move said knife into a pro ecting position penetrating said web and upon collapsing thereof to shift said knife to a retracted position on said carriage out of the path of said web, a reversible drive for said carriage, and means connecting said drive with said toggle linkage adjacent the pivotal joint thereof to cause said straightening movement of said linkage upon actuation of said drive in the direction to advance said carriage and to cause said collapsing movement of said linkage upon actuation of said drive in the direction to return said carriage.

10. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said web, a knife mounted on said carriage for movement between a retracted position out of the path of said web and a projected position penetrating said web, means for effecting said movement of said knife while holding said carriage substantially stationary to cause said knife to penetrate and slit said web lengthwise thereof, means under the control of the operator and operable following said penetrating movement of said knife to effect said movement of said carriage causing said knife to travel with said carriage transversely of and in cutting relation with said web, and means forming a swivel mounting for said knife with respect to said carriage causing said knife to align itself with said web following penetration thereby of said web with said carriage stationary and to adjust the angular position thereof during cutting movement with said carriage in accordance with the relative speeds of said web and said carriage.

11. A tail cutter of the character described for a traveling Web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, means supporting said knife on said carriage for movement between a retracted position out of the path of said web and a projected position penetrating said web, operating means for effecting said movement of said knife on said carriage and for effecting said movement of said carriage in timed relation with said movement of said knife to cause said knife to penetrate said web and thereafter to travel with said carriage transversely of and in cutting relation with said web, and means forming a swivel mounting for said knife with respect to said carriage causing said knife to adjust the angular position thereof with respect to the path of said web in accordance with the relative speeds of said web and said carriage.

12. A tail cutter of the character described for a traveling web comprising a carriage, means for supporting said carriage adjacent said web for movement substantially parallel to said web and transversely of the direction of travel of said web, a knife, a support for said knife mounted on said carriage for movement between a retracted position holding said knife out of the path of said web and a projected position causing said knife to penetrate said web, operating means for effecting said movement of said support on said carriage and for effecting said movement of said carriage in timed relation with said movement of said support to cause said knife to penetrate said web and thereafter to travel with said carriage transversely of said web in cutting relation with said web, and means forming a swivel connection between said knife and said support causing said knife to adjust the angular position thereof with respect to the path of said web in accordance with the relative speeds of said web and said carriage.

References Cited in the file of this patent UNITED STATES PATENTS 1,871,334 McNeill Aug. 9, 1932 1,920,591 Pesci Aug. 1, 1933 1,996,224 Wedekind Apr. 2, 1935 2,328,443 Foster Aug. 31, 1943 2,343,047 Doyle et al Feb. 29, 1944

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