Патент USA US2132460код для вставки
Oct. 11, 1938. H. A. CUMFER 2,132,460 CUTTING DEVICE Filed Decf4, 1935 2 Sheets-Sheet l S ® È lNvENToR #4R/17 A fam/ff? BY ` , M4146 f4 ` ¿l ' . ATTORNEYS Oct. 1l, 1938. H. A. CUMFER 2,132,460 CUTTING DEVICE File-d Dec. 4, 1955 2 Sheets-Sheet 2 2,132,460 Patented oct. 11, 1938 I UNITEDA STATI-:s2,132,460PATENT Aorricle: ' CUTTING DEVICE Harry A. Cumfer, Chicago, Ill., assigner to United States Gypsum Company, Chicago, Ill., a cor poration of Illinois Application December 4, 1935, Serial No. 52,773 V9 Claims. (Cl. 164-33) This invention'relates to the manufacture of covering elements and more especially to the pro duction of rooñng elements intended to simulate aplurality of shingles or similar rooñng elements. The invention particularly relatesto produc ing, from sheets of fabric `impregnated land coated with bituminous materials, covering ele , body of the rotor, a port being provided leading to a central cored chamber in the rotor or in some cases leading again to the circumference of the rotor at a place peripherally removed from the cutting knife. Such cutting devices, however, have -the disadvantage that owing to the adhe sive character of the pieces so removed and be cause of the limited cross-section of the chan ments in which the units are simulated by tabs upon the element separated by spaces or cut-outs formed by removal from‘thesheet of a` portion nel the movement through the channel and through the port to clear the rotor of such pieces 10 thereof. is interfered with or stopped. When this occurs ` _ ‘ n Roofing strips intended to be laid in courses with the length of the strip in the coursewise di rection and having formed upon one lengthwise the process of cutting the elements must» be stopped in order to clear the rotor before pro edge of the strip a plurality` of tabs'separated by cut-outs heretofore have b'eenfproposed in many forms. Such strips have been .made by various forms of cutting devices, including the so-called cylinder cutters in which the cutting knives are The invention of the present application pro vides a positive means for moving the portions V20 mounted upon `the periphery of a rotor and the sheet is delivered in tangential or peripheral con tact with the rotor and in such relation to the fering with the cutting action of the knife and effects a positive movement of removal of the I15 blade that when the knife has passed through the point of tangency of the sheetwith the rotor the 2,5 sheet »will have been severed by said knife. In this action the motion of' the knife in, its pe ripheral movement about the axis of .rotation has a component which is in a directiony transversely of the surface of the sheet, which effects the 30 cutting of the sheet'to sever one portion` thereof ceeding. ‘ or pieces severed by the cutting knife soI as to clear this knife of said severed pieces. lThe in vention provides for such removal Without inter lsevered piece after completion of the severing cut. The invention further provides for the pos itive ejection of the severed piece from the cut ting device so that the knife is cleared of 'con tact with the-severed pieces before again coming into cutting relation with the sheet. This action of the device of the present invention may be accomplished with materials of different kinds but is especially eifectivewhere the pieces which 30 are severed are adhesive because of their being from the other. The present invention isv par ticularly concerned with cutting .cylinders or` saturated or coated with adhesive materials, as equivalent devices' which are, utilized for cutting in the manufacture of roofing elements. While a simple embodiment of the invention sheets in this manner. ï In` the manufacture-.of shingle strips or other is shown in the drawings and is described in the covering units in which slots or cut-outs are specification, the invention finds application to formed a problem arises in the removal ofthe cutting devices having different forms. It is a feature of the invention, however, that similarly vpiece of material cut from the lsheet in the for mation of. theslot or cut-out. Especially When to the embodiment illustrated and described, the invention finds particular application in those 40 sheets of fabric are impregnatedor are impreg nated and coated with bituminous materials, such devices in which the cutting action proceeds in as asphalt _or other mastic and adhesive saturants a continuous manner from the start of the cut ting to the completion thereof and especially and coatings, the removal of the pieceof mate rial corresponding to the slot becomes diiìicult lwith concomitant motion of the sheet. This con comitant motion which, in the embodiment il 45 45 because of the adhesiveness of these saturants > and coatings which causes the vpiece to cling toA lustrated, is that occurring in feeding the sheet the cutting device. Itbecomes necessary to take tangentially to the peripheral motion of the ‘measures to insure the removal of Ythis piece if rotor, is combined with a motion of the knife damage to the elements being made is not to as stated above, which is transversely of the occur and if‘proper action of the cutting device movement of the sheet or has a component in said transverse direction. In the embodiment il is to be secured. , . , _ Heretofore it has been suggested to remove this lustrated this is accomplished merely by the piece of material by forcing the successive pieces motion of the knife along the circumference of inwardly toward lthe axis of the rotor> through the circle about the axis upon which the rotor 55 channels or vaults formedïas 'by coring in the rotates. 2 v2,132,460 In order to effect removal of the severed piece from contact with the knife the device of the invention provides means positioned adjacent that it may be moved transversely of its length the knife and arranged to be moved with re the ejector bar 21 is at the portion of the recess 1 of the rotor.' As illustrated in Figures 1 and 2, spect to the knife in a direction of said trans 25 toward the axis 1. verse movement or ofV said component. In the may be seen a space between theV bar 21 and the illustrated embodiment the movement of said device is transversely of the peripheral extent of the rotor and, therefore, is transversely of the surface of the sheet when the knife is in cutting position. By this motion transversely of the sur face of the rotor ejection of the severed piece bottom face I8 of the block I3. Fastened to the ejector bar 21 by means of bolts 29 tapped in the from the rotor and from contact with the knife is secured and also recession of the means for effecting the ejecting may be accomplished so as to avoid interference with the cutting action of the knife when said knife is in cutting rela tion to the sheet. The means by which this mo tion transversely of the periphery of the rotor is 20 accomplished will be more clearly understood, as -will be the operation of the device of the in vention in the production of covering elements, from the description to follow in connection with the drawings in which Figure l shows in part a longitudinal section and in part an elevation of the device of the invention; so in a direction outwardly and inwardly of the axis Figure 2 is a section on line 2--2V of Figure 1; Figure 3 shows an end elevation of the device of the invention; and Figure ‘l is a side view in outline of the same. In the drawings the rotor I is constructed with a body 3 which may be cast or forged in gen erally cylindrical form and may be provided with a shaft 5 cast integrally therewith and turned Vconcentric with the axis 1 of the cylinder. In the drawings the shaft 5 is shown extending at oneside of the rotor, only one-half of the length of the particular rotor illustrated being shown in the drawings. The shaft when mounted in suit able‘bearingsindicated by 8 makes possible the rotating of the rotor `upon its axis 1 by any suitable mea-ns, as by a spur gear on either or both ends of the shaft and fitting into the driv ` ing train of the machine. A sheet of material I3, Fig. 3, may, therefore, be contacted and severed when passed between the rotor I anda counter cylinder or anvil roll 3. In the periphery of the body 3 of the rotoris Outwardly of the bar 21 bar 21 is a block 3| of such cross section as to ñt the slotted portion 2|) of the block I3 and to pass up between the blades I5 of the knife I4. The dimension of the block 3| outwardly from the bar 21 is such that when the bar 21 is in the recessed position, as shown at the top of Figures 1, v2 and 3, the outer end of the block 3| is in wardly of the cutting edges of the knife I4 so that, as may be seen in Figure 3, the sheet I0 may be cut'by the knife I4 without interference ofthe block 3|. Upon the ends of the ejector bar 21 are mounted "20 rollers `35 fitted to run upon-the turned portion 31 of the barl21. AThe turned portion 31 of the bar 21v projects beyond the end face 4 of the rotor bodyl 3 so that the roller 35 is exterior to the body 3 of the rotor. A cam or eccentric plate 40 is formed as a ring >with its internal diameter fitting to the shaft 5 and held against the body 3 ofthe rotor by means of the end of `a stationary bearing sleeve or block 4| for the shaft‘5, by meansof set-screws 30 42 passing through a flange ring of plate 40 which snugly fits over the end of the said bear ing. AIn the face of thecam plate 40 is formed a camgroove having-its outer face 43 parallel to the inner face 44 and of such width between said cam faces and of such depth inthe inner face of the camplate 40 that the cam roller 35 may >flt into they groove thus formed in the cam plate 40 with a running clearance when the plate 49 is positioned against the body 3 of the rotor and held in engaging stationary position with the cam roller 35 by the bearing 4| as described. The cam surfaces 43 and 44, which are shown in do-tted line in Figure 3, in the particular em bodiment illustrated are cylindrical surfaces 45 parallel to each other. These surfaces, however, formed a recess orsocket II within which may are formed eccentric with‘the axis 1 of the rotor. The cam plate 40 is held from rotation by means of thestationary bearing 4| and the set-screws '42. A bracket 41 is suitably fastened to the frame 50 of .the machine or, as shown, to the cam plates 40 at the ends of the rotor by means of the screws 49 tapped in the cam plate 40. Also for means of bolts 2| having the heads23 thereof countersunk-in-the block I3 and tapped into the body 3 of the rotor the block I3 may be held securely in the Yrecess II. By removal of the bolts 2| the block I3 may be withdrawn bodily plate having a similar groove formed with eccen tric Ycam surfaces 43 and 44 and positioned in like relation as to direction of eccentricity with v65 respect to the axis 1 of the rotor. A similar fastening means, as «by the bearing“ and screws 42, may =be used at each end. These means of 50 be mounted arblock .I3 carrying the knife I4. Said knife, as formed in the particular embodi ment illustrated, is provided with blades I5 bear ing upon the shoulder l5 formed in the block I3. ' each cam plate a pin 50,may be provided. A By means of screws I1 passing'laterally through wiper or stripper 5| of rubber‘or other flexible 55 55 the block I3 from each side thereof andhaving or resilient material is secured to the horizontal the heads I3 countersunk in the block I3, the portion Vof `bracket 41 with its opposite free edge knife |4 is held in place in the Lblock I3, the projecting into the path of the ends of the ejector screws being tapped into the blades I5 of the blocks 3|, as seen in Figure 3, to brush off any cut out portions having a tendency to stick to 60 60 knife I4. The block I3, together with the knife -I4, securely held therein as described, may be the ejector blocks 3|. A cam plate 40 ymay be inserted in and removed from the recess I I. By provided at each end of the rotor I, each cam from the recess and thereafter the knife I4 may be removed from the block for the purpose of , 70 grinding or replacement. The body 3 of the rotor also is longitudinally recessed at 25 as shown in the cross-section in Figure 2 to provide a space within which the ejector bar 21 may be arranged, said bar being 75 of such cross-section with respect to the recess fastening prevent rotation of the cam plates "4U when the rotor cis rotated upon its axis ’1 to bring 70 the cutting knives into cutting engagement with the ’sheet 'IU kas the sheet moves tang'entially to the rotor In >view of the eccentrícìty of the cam surfaces 43 `and. î44 and the .engagement Vof the roller -35 75 Y2,132,460 -3 therewith it will now be understood that, as the rotor rotates upon its axis and as the Vbody 3 of the rotor carries the bar 2‘I and its block 3| around the axis V'I, the camroller 35’will be of the ejector mechanism and the cam roll 35 and -the cam surfaces 43 and 44 are protected against damage due to grit and interference with their moved outwardly and inwardly with respect to lFigure 4 shows in diagrammatic outline the complete rotor in which two circumferential rows the axis 1 of the rotor in a complete revolution or rotation upon its axis; Thus the block 3| will be moved outwardly and inwardly within the space between the blades I5‘of the knife I4. In 10 a rotation'from the position shown in Figure `3 where the upper Aknife is in cutting engagement with the sheet I0 and the block 3| is withdrawn below the edges of the knife blades I5, the block 3| will be moved outwardly between the blades 15 until at the quarter revolution substantially the outer face 32 of theY block 3| may be at the periph ery corresponding to the cutting edges of the knife blade I5.r In thismovement the piece of material which may be retained from the cut just 20 finished between the knifeblades 4I5 has been pushed out between these blades land may fall clear of the rotor. If by the adhesiveness of the saturating or coating materials or for other rea son the piece adheres to one or the other knife 25 in the next quarter revolution, a further move mentv of the block 3| is produced to completely pushthe severed piece clear of the'knife blades I5. If the piece >still clings, the brush, wiper or stripperA 5I engages and effectually‘removes it. '30 Thereafter upon further rotation of the rotorthe block 3| recedes again between the knife blades operation. or sets of knives I5 are shown, that being the usual arrangement, though of course any num ber of rows or length of rotor may be provided. These knives or associated parts are all of the 10 same construction, arrangement and operation as those specifically shown and described, except that the longitudinal recesses in the rotor and the ejector bars 21 therein suñice for the plurality, in this instance two, of knife assemblies, ejector l15 blocks 3|, etc. which are disposed in the same longitudinal line of the rotor. Thus a single ejector bar serves as the operating means for a plurality 'of ejector blocks. Various modifications of the invention from that illustrated in` the drawings and particularly described may be made without departing from the sipirit of the invention. Different forms of mechanism to produce the motion of the ejector ' block 3| may be utilized which secure the proper 25 time relation between the ejecting action and the cutting of the sheet. All such variations are within the scope of the invention and are in tended to be covered by the claims. ' I5 and when the blades ` I5 are about to come Having thus described my invention, I now 30 claim: 1. In a rotary cutting device, a knife blade into cutting relation with the‘sheet I0 the-face mounted adjacent the periphery thereof with 32 of the block 3| has receded below the edges of 35 these blades so that the cutting may be started and completed without interference by the block 3|. It will be understood that although in the illus trated embodiment the cam surfaces have‘been 40 shown in the simple form provided by parallel cylindrical surfaces eccentric to the axis of the rotationof the rotor, other forms of cam surfaces may be used to effect a quick ejection or a dwell in the different portions of the revolution. 'I‘he device illustrated, however, provides an easy mo _tion which is mechanically positive and is effec tive to move the ejector block between the knife blades and to eject the severed pieces frombe tween the blades. No complicated kinematic mo 50 tions are involved, and the parts may be readily removed for renewal orv repairs. ` Such removal may be effected by removal -of the rotor unit and the bearing as a whole from the machine frame or housing and disassembling the parts. The 55 knives may, of course, be quickly removed with out taking out the rotor. The rotor may be provided also with suitable severing knives or blades as indicated in dotted lines in Figure 1, a circumferential knife or blade being indicated 60 at 85 and a longitudinal knife or blade at 89, these being arranged, supported and secured in any desired or usual way. In Figure 1 in the cam plate 40 is shown a groove |00 cut in the inner face of the plate ad 65 jacent the periphery thereof in such position as to be covered by the end of the body 3 of the rotor I or by the filler plates |02. 'I'his groove preferably is filled with a felt gasket or washer of suitable size and section to bear against the 70 end of the body 3 and the filler plates |02 as the rotor I is rotated between the cam plates 40». This gasket serves to prevent dust or grit or other for eign material passing between the body 3 of the ro-tor I and the cam plate 40 and entering the 75 recess 25. Thus the internal reciprocating parts one of the faces or said blade which form the cutting edge extending in a plane transversely of 35 the peripheral ‘extent of the device, a member adjacent said face of the device arranged for movement in a direction generally parallel to said face of the blade, a cam surface described around the axis of rotation of said device, and 40 a cam roller arranged for rolling upon said cam surface and connected to said member, said parts being arranged so that upon rotation of the de vice said member is moved outwardly from said axis. 45 2. In a rotary cutting device, a knife blade mounted adjacent the periphery thereof with one'of the faces of said blade which form the cutting edge extending in a plane transversely of the peripheral extent of the device, a member 50 adjacent said face of the device arranged for movement in a direction generally parallel to said face of the blade, a fixed member providing a cam surface described completely around the axis of rotation of said device, means carrying a 55 cam roller and fastened to said member so as to move therewith and formed and arranged to hold said cam roller in contact with said cam surface as said device rotates upon said axis, whereby reciprocal movement of said member in said di 60 rection is effected. 3. In a rotary cutting device, a rotor arranged to rotate upon an axis and having a periphery generally concentric with said axis, said rotor being formed to hold a knife having a blade 65 Ywith that face of said blade which, with the bevel face of the blade, forms the cutting edge of the knife in a plane generally transverse to the pe riphery of the rotor, a ring fixed with respect to said axis of rotation and providing a surface sur 70 rounding said axis eccentric to the periphery of said rotor, said rotor providing adjacent said face of the knife blade a slot extending gener ally parallel to said face, an ejector block mov able in said slot in said direction parallel to said 75 4 face, a bar fastened'to saidblock and arranged with an end thereof adjacent said eccentric sur interchangeable longitudinal bars in said slots >andv spaced from the circumference of said cylin face and-providing an axis substantially parallel derffmeans-for'bodily lateral movement of said to said eccentric surface, and a roller larranged barsï during-a rotation of said cylinder, inter changeable çutter blocks substantially flush with to turn'upon> said axis provided by said bar and to roll upon said eccentric surface to cause move ment of `said block loutwardly and inwardly in said slot upon rotation of said rotorrupon its axis. 4. In a rotary cutting device as in claim >3, means for moving a sheet of material into Vpe ripheral cutting contact with said knife when saidblock is at a point inwardly of.A said slot to leave the blade free of interference with the cut ting, said parts being so arranged that upon out ward movement of said block the portion of the sheet severed at said face of the blade is moved out of contact therewith. 5. In a cutting machine of the character de scribed, a movable knife support for cutting co 120 operation with an anvil„said support having an open end T shaped slot in the surface thereof ex tending the entire length of said support and providing longitudinal shoulders, a longitudinal ejector bar in said slot below said shoulders and 125 arrangedY for bodilyA lateral- movement therein, a cutting block on said shoulders, outwardly ex tending knives on said cutting block substan tially vin lateral alignment with said bar, lan ejector memberA between said knives and mov able with said bar, automatic means for moving said bar during movement of said support and iiller blocks closing said T slot between said cut ting blocks. . 6. A cuttingl rotor of the character described comprising a cylinder having a plurality of longitudinalradially disposed open end slots ex tending therentire length of said cylinder, elon gated interchangeable longitudinal bars said slots and spaced from the circumference of said cylinder, means for bodily later-al movement of said bars during a rotation of said cylinder, in terchangeable cutter blocks substantially flush with the surface of said cylinder, said blocks having openings therein substantially in radial alignment with said bars, said blocks having out wardly extending cutting edges deñning said openings, and ejector members on said bars and substantially iilling said openings, and ñller blocks closing said slots between said cutter blocks. 7. A cutting rotor of the character described comprising a cylinder having a plurality of longi tudinal radially disposed open end slots extend ing the entire length of said cylinder, elongated the surface of said. cylinder, said blocks having openings therein substantially in radial align _mentwith said bars, said blocks having outwardly extending cutting edges defining saidopenings, ejectorlmembers on said bars and substantially filling said openings, and means accessiblelfrom outsidesaid cylinder to enable removal of said il) ejector blocks through said openings. 8-.fI'n a cutting machine of the character de scribed, a cylindrical cutting rotor arranged for 15 continuous rotation for cutting cooperation with an anvil roll, said rotor having longitudinal ra dially disposed T shaped peripheral slots, the T. slots providing longitudinal shouldersflongi tudinal bars in said T slots below the said .shoul 20 ders and arranged for radial reciprocatingv move ment therein, cutting blocks supported on said shoulders and having their outer surfaces form ingcontinuations ofthe surface of said rotor, said cutting blocks having kopenings therethrough , iniradial alignment with said bars, cutters on opposite -sides of said openings and extending beyond the surface of said rotor for cutting co operation with said anvil roll, ejector members removably secured' to said bars and substantially 30 ñlling the openingbetween said knives and ter minating below the cutting edges thereof, and means for reciprocating said bars during a revo lution of said rotor to cause said ejector members to ejectcut portions from between said knives. 35 '9. A cutting device of the character described comprising a rotor having a longitudinal cham ber completely therethrough between the axis and the yface of the rotor, a Anormally fixed member substantiallylsealing each end of said chamber 40 and arranged to permit rotation of said rotor therebetween, a longitudinal ejector bar in said chamber, meanslto cause automatic lateral re ‘ciprocation ofy said ejector bar during movement of said rotor, said chamber forming a substan 45 tial passage past said bar during its movement, spaced cutting knives on said- rotor substantially in radial alignment with said bar, an ejector member on said bar and extending through the rotor wall and between said knives, and provid 50 ing a substantially sealed joint between said member and the-rotor Wall. HARRY A. CUMFER.