US2289909A - Corrugating machine - Google Patents

Description

July 14, 1942. H. B. G'REENWOOD 2,289,999

CORRUGATING MACHINE Filed Nov. 5, 1938 6 Sheets-Sheet 2 July 14, 1942. H. BfGREENwooD 2,289,909

' CORRUGATING MACHINE l Filed Nov. 5, 195s 6 `Sheets-sheet 5 B FLUTE UNH' ,July 14, 1942 H. B. GREENWOOD 2,289,909

CORRUGATING MACHINE Filed Nov. 5, 1958 6 Sheets-Sheet 4 LINER A FLUTE UNI-r July 14, 1942. f H..B. GREENwoD 2,239,909

I 4 4 v( :oRRUA'LIIm' MACHINE 'I Filed Nov. 5, 1958 6 Sheets-Sheet 5 PLOT'. uhu-r DRIVE MECHANIVSM July 14, 1942- H. B. AGREENWOOD l 2,289,909

CORRUGATNG MACHINE Filed4 Nov. 5, 1938 6 Sheets-Sheet 6 MA .TIR

MBTR

avan-ausm chu-reu FRAME A n uvi. um-r ww E Patented July 14, 1942 l UNITED ,STATES PATENT OFFICE CORRUGATING MACHINE Henry B. Greenwood, Glen Arm, Md., assignor to F. X. Hooper Company, Inc., Glen Arm, Md., a corporation of Maryland Application November 5, 1938, Serial N0. 238,961

8 Claims.

The invention relates to the production of corrugated paper, and particularly to a machine for this purpose. While the machine is adapted to be combined with an additional unit, or plurality of units, for the production of doublefaced board, as hereinafter defined, and this arrangement serves an important function in the production of this latter material, the machine per se 'has become known in the trade as a tanloss of power, and -all the heated or steam rollers are adapted to be kept hot, or pre-heated without loss of time by running the machine idle, so that there is no harmful warping of the roll; ers and no delay incident to changing from one type of corrugated board to the other, i. e. from the A to the B flute, or vice versa, the present machine being constructed to make these two standard boards, or if other sizes of corrugation were desired, the machine could, of course, be equipped accordingly.

Another -prior art machine which is intended to make A and B flutes single face corrugated board, has twounits placed one above the other,

making the machine of great height, which is exceedingly awkward for vthe operator. This, and other disadvantages of the double decker machine, are overcome by the present machine, which has the advantages above recited, and other advantages hereinafter related.

The machine of the present invention consists of two standard single facer units, preferably an A flute and a B flute unit, or, the two units may, if desired, be adapted to the same flute. These dem single facer, and has, as its primary funci units are placed in tandem, and preferably tion, the production of single face corrugated mounted on a single base, such construction beboard. ing the one illustrated.

The prior art contains machines for making This machine is. so arranged that it may be two kinds of board. For this' purpose there operated from a single motor, and each head is must be two sets of rollers. While the machine also provided with a small or relativelyv lowof my previous patent, No. 2,106,500 is compact powered motor by which the unit may be operand serves, in an exceedingly practical way, in ated at a slow speed when it is idle, or for any the production of either A or B flute, single face desired period before it is placed in operation, corrugated board, it is found that the rollers, without interfering with the operation of the i. e. the heated or steam rollers of the idle unit, other unit. must be disconnected from the steam line when This provides for heating the rollers without not in use and must, therefore, bere-connected delay when it is proposed to change from one when swung into operative position. Also, the unit to the other, i. e. from one type of corruidle rollers cool and collect condensed water on gaton or corrugated board to the other, and by one side, which causes warping due to difference 2.3 driving the rollers at a slow speed in this way, of temperature. When used, they must be first during idling, the tendency of the condensed wareconnected for approximately fteen minutes ter to collect at the lower side of the rollers, thus to heat them up, and to overcome any tendency giving a difference of temperature between the to warping, they must be run for at leastV an upper and lower sides of the individual rollers, equal period. There is, therefore, at least a with consequent warping, is completely avoided. fteen minute loss of time of the machine, and If, for any reason, the unit is stopped, i. e. the a consequent delay in changing from one type of rollers of either unit are stopped, this warping board to the other. effect is overcome by running the unit for a few An important advantage of the machine of the minutes from the corresponding small, or lowpresent invention is that this delay iscompletespeed motor before it is placed in actual operaly avoided, and there is no harmful warping of tion in the production of corrugated board. the rollers due to the condensed water. V'I'he im- Preferably the small low-power motors, one proved machine is so arranged that the hot rollfor each unit, referred to as idling motors, are ers of the idle unit may be rotated, during the connected to their respective units by means of operation of the other unit, without considerable 40 overrunning clutches, which serve an important function in their operation, and the main or driving motor which operates the machine, in the production of corrugated board, is connected to each unit by means of a clutch so that the units may be operated separately or together.

As the main motor operates the heads at a higher speed than that at which they are driven by the respective small or idling motors, the overrunning clutch provides that either head, when it is rst connected to the driving, or main, motor, is picked up by this main motor, the load being assumed by the faster drive in accordance with the known operation of the overrunning clutch whereby the small motor is relieved of its load.

While the use of these small idling motors, in a somewhat similar relation, is known, it is believed to have been confined to the driving of the paste rollers to prevent drying of the paste on the rolls when the machine is not in use and prior to removing the paste and cleaning the rolls which is the practice when the machine is to be idle for any considerable period.

Double drive, i. e. the use of the idling motors with the overrunning clutch for driving the steam rollers, including the corrugating roller, has an important advantage in addition to that already described in that it provides a slow motion of the roller which is of particular advantage in threading the paper into the machine, in that it starts the paper web at a low speed, and prevents breaking or tearing of the web, and is otherwise more convenient for threading.

Important advantages of the machine are that, in addition to making either A or B flute single face corrugated board, it provides for instantaneous change from one product to the other, the web being instantaneously severed and rethreaded in a manner described, and, as already pointed out, the machine provides for instantaneous change from the operation of one head to the operation of the other head, and from the production of A flute to B flute, and vice-versa, from the same webs and with the straw and facer rolls in the same position. It is also an important advantage that the machine is adapted'to the production of A and B flute single face corrugated board at the same time, both heads being operative simultaneously, and the machine is further adapted to the continuous production of doubledouble board, i, e. board consisting of Vtwo layers of corrugated paper, or straw, as it is called, and three liners, one on each outer side and one between the two layers of corrugated material.

As already pointed out this latter operation requires additional units in the form of two sets of paste rolls and paste pots, and a conveyor for leading the two webs of single face corrugated board from the tandem single facer to the latter pasting units, a roll stand for an additional liner and pressing unit and hot plate for aflixing the liner, or facer, and for attaching the two webs to each other in the final product, i. e. the double-double board.

In the accompanying drawings, I have illustrated a machine embodying my invention in the preferred form in which it is adapted to accomplish the various operations above outlined.

In the drawings:

Figure 1 is a Side elevation of the tandem single Y facer shown in operation in the production of A flute single faced corrugated board, the View be* ing diagrammatic in nature.

Figure 2 is a diagrammatic view of the same tandem single facer shown in operation in the production of B flute corrugated board.

Figure 3 shows both units in operation, producing both A and B flute single face corrugated board, and this view may also be treated as a fragmentary view showing the production of double-double board, the additional unit being to the left of Figure 3 and the conveyor being fragmentarily shown.

Figure 4 is a similar elevation showing the delivery conveyor extending to the left from Figure 3, and having festooned thereon the two webs of A and B flute corrugated board produced on the machine, as shown in Figure 3, from which the webs are led to the pasting units for coating the corrugated webs for the attachment of the two webs of corrugated board to each other, and for the attachment of an additional facer or liner.

Figure 5 is a similar elevation of the two pasting units and shows fraginentarily the liot plate pressing mechanism for completing the assembly of the double-double beard.

Figure 6 is a similar elevation of the rolls and roll stand for the additional facer, and Figures 4 and 6, as drawn, together show the subject matter of both gures in its actual relation.

Figure 7 is a section taken longitudinally of a fragment of double-double corrugated board.

Figure 8 is a side elevation from the same point of view as Figs. 1 to 3, but on a larger scale, showing the corrugator head, or unit, for the B ute at the right in Fig. 1.

Figure 9 is a similar elevation of the unit or corrugator head at the left in Fig. l designated as for the A flute.

Figure 10 is a plan View of the driving mecha nism corresponding mainly to the subject matter of Fig. 8, and located at the right of the line X in Figure 9.

Figure 1l is a plan of the driving mechanism to the left of this line X, and corresponding to the subject matter of Figure 9.

Referring to the drawings by numerals, each of which is used to indicate the same or similar parts in the different gures, the machine, as shown in Figs. 1-5 consists of two units, or heads, indicated by reference characters l and 2 respectively which, in the preferred form of the invention, are mounted on a single base indicated by reference character 3. Each head may be described in a general way as'consisting of steam rollers 4, 5 and 6 in the unit I, and 4', 5', and 6' in unit 2. Each head or unit also comprises corrugating rollers 'I-8 and V-. in the respective units l and 2, which are also steam heated according to the usual practice. Each unit in the form shown also comprises a straw-presenting roller 9 and 9' and a roll stand lll-IEB'.

The stands are ordinarily employed, one for the straw or paper to be corrugated, and the other for the liner, each stand carrying in addition to the roll Il or I I' being used, a spare roll I2 or I 2'. Each unit also comprises paste rolls I4 and It and the usual paste pot I5 and I5' and a side frame Iii-I6', and each unit is equipped with a delivery belt II-l'l' extending upwardly to the left in Figures 1, 2, and 3, the belts being shown as substantially parallel. The delivery belts are supported at their delivery ends by pulleys or the like.

Figure 1 shows the liner being led from the roll Il on the roll stand Iii, the roll l2 being a spare roll. The roll stand I9' also carries a .spare roll I2'. The liner in Fig. 1 is rst led over guide rollers I9 and 2Q, and around the steam rollers 4', 5', E' into the usual combination with the straw. The straw web is led from the roll II' and over the presenting roll 9' into operative relation with the corrugating rollers 'I' and 8', the straw and liner being combined between the rollers 6' and 'I', and discharged from the unit by way of the delivery belt I1', 6 and 6 serving as presser rollers.

Figure 2 shows the liner still taken from the roll II on roll stand lil, but, instead of being led around the guide rolls I9 and 20 into combination with straw board in the unit 2, it is led direct to the steam or heating rolls 4, 5 and 6 of the unit I, it being understood that the liner web is severed for this purpose from the rollers as shown in Figure 1, and threaded about the rollers 4, 5

and B in the manner already suggested, the unit I having been previously warmed up and operated at slow speed-.in the manner already suggested and to be hereinafter described.-

In Figure 2I the straw or material. to be corrugated is still led from the roll II on the roll stand III and over the presenting roller 9', but,

instead of being led to and about the corrugating rollers 'I' and 8', it is severed from contact with these rollers and led to the presenting roller 9 and hence to the corrugating rollers 'I and 8, being combined with the liner between the heated roller 6 and the corrugating roller 1, whence the single face corrugated board indicated by reference character 23 is led to the delivery belt II and hence from the unit.

Figure 3 illustrates the production of two Webs of single face corrugated board simultaneously, one by each head or unit I and 2. In this instance theV head or unit I is producing B ute single face, and the head 2 is producing A flute single face. In the arrangement shown in Figure 3, roll stand I 8, at the right, carries a roll, II of liner, and a roll I2 of straw. 'I'he straw, or paper to be corrugated, is led to the left, or forwardly, around the guide roller I9 and from there to the straw presenting roller 3, hence to the corrugating rollers 'I and 8. The liner is led from the roll II direct to the steam rollers 4, 5 and and combined with the corrugated straw, as in Figure 2. The single face B ulte corrugated web is discharged by way of the delivery belt I1 as previously.

The head 2 in this instance operates as follows: The liner is led from the roll II to the guide roller 28, and hence around the heating or heated rollers 4', 5 and 6 to the point of combination with the corrugated straw between the rollers 6' and 'I'. The straw to be corrugated in this way is led from the roll I 2' to the presenting roller 9 and hence to the corrugating rollers I and 8', being combined with the liner as already described, and delivered from the machine by wav of the delivery belt I'I. The roll stands I l) and Ill' may be utilized, as described, with no spare roll, or additional stands may be provided.

Figure 3. as already pointed out, and as just described, illustrates the production of two webs of single face corrugated board simultaneously .on the two heads I and 2.

Figures 4, 5 and 6 relate to further means whereby the two webs of corrugated board, thus produced, may be combined with an additional liner to produce double-double board.

In Figure 3, pulleys or the like, I 8-I 8f at the delivery ends of belts I I and I'I' are shown as mounted on a bracket 22, one above the other. This bracket is mounted on the frame of a conveyor 24. which substantially horizontal and feeds to the left in Figure 3. being broken away in this ligure at the extreme left, and continued to the left in Figure 4. Conveyor 24 is in the nature of a trough, having side walls 24' and a conveyor belt 25 all in accordance with the usual practice. Figure 4 shows the webs 23 and 23', of single face corrugated board. leadingr forwardly from the delivery belts I1 and I'I' and lying in festoons. or festooned, on the table or conveyor 24, the contour of the paper web being somewhat as illustrated in Figure 4.

At the left in Figure 4 is an upright carrier over which the webs may be drawn, and between which and the delivery belts I'I and Il' the webs are permitted to accumulate in the festoons illustrated in Figure 4.

Figure 5 illustrates the combination of the webs 23 and 23' with a third facer web, or liner, to produce the double-double board already suggested, it being understood that the third liner, or facer, may be omitted. This arrangement comprises two pasting or glue units 2'I and 21', one above the other. These consist of the usual paste pots 28 and 28', and rollers 29 and 29.

As the webs 23 and 24 approach the units 2'I and 2'I the straw or corrugated portion of both webs is downwardly disposed, the liner, or facer, being on top.

To complete the double-double board illustrated in Fig. 7, the depending peaks 3I of the corrugated straw, of the top web 23, are paste, or glue-coated, whereby the liner 32 of the bottom web 2 3 is caused to adhere thereto, and the depending peaks 33 of the corrugations of the bottom web 23' are also paste, or glue-coated whereby a third liner 34 is caused to adhere to these peaks forming a web composed of the top facer, or liner, 35, the corrugated straw, 33 of the top web, the liner 32 of the bottom web, the corrugated straw 31 of the bottom web and the additional liner 34.

To present the bottom liner 34 for combination with webs 23 and 23', as above described, this liner, or web 34, is delivered beneath the pasting units 2'I and 21 from a third roll stand 40, shown in elevation in Fig. 6, which gure eX- tends to the lower right of Fig. 5. Figs. 4 and 6, together, show their respective parts of the machine in their actual relation. The roll stand 48 is shown as carrying a roll 34' from which the web, or liner, 34 is being taken and a spare roll 34". The construction Fig. 5, also includes in addition to the pasting units 2'I and 21', heated or steam rollers 4I and 42, about which the liner 34 is passed from guide roller 43' and the roll 34 and there is a guide roller 43 for nally guiding and presenting liner 34 to the point of combination with webs 23 and 23'.

The webs 23 and 23', as shown in Fig. 5 are led from carrier 26 to the pasting unit-s 2l and 2l'. Figure 5 also shows suitable guide rollers for these webs at 33, 3D', 3U and 36". The webs 23 and 23.', after passing through the pasting units and the liner 34 from the guide roller 43, converge and contact in registration on a hot plate 44 and between the same and a suitable roller, preferably a heated, or steam, roller 45, whereby the webs 23 and 23 and facer 34, are combined in accordance with the usual practice kto produce the double-double board shown in Fig. 7.

The hot plate mechanism 45, including the hot plate 44 is a well-known type of apparatus, the details of which have no bearing on the present invention, and does not require further description, alnd the double-double board, as well as the single face boards described, are a known product as to which no novelty is claimed.

Figs. 8, 9, 10 and 11 illustrate the idling drive with the low-power idling motors and the overrunning clutches connecting the same to the steam rollers, and particularly, to the corrugating rollers for the idling operation, from which they are picked up by the main motor for operation of the respective units in the production of corrugated board. I

Fig. 9. This motor carries on .its rotor shaft a small V-,grooved drum 5I having in driving relation in said grooves V-belts'52 which drive, by way of drum 53, a clutch shaft v54 extending transversely of the bed 3 between the units. This clutch shaft 54 has keyed to it operatorcontrolled clutch members 55 and 56 which are slidable in the direction of the shaft, and provided with suitable jaws for engagement with corresponding clutch members 51 and 58, which are respectively secured to or provided with doun ble sprockets 59 and 66 which turn freely on shaft 54. The sprocket 59 drives chains 6l which, in turn, engage and drive a sprocket 63 on and secured to a shaft 64, suitably mounted in the frame of the unit 2. This shaft 64 car ries, suitably secured thereto, a sprocket 65, which drives a corresponding sprocket 66 by way of chains 61. The sprocket 66 is mounted on a hub member 68, which turns freely on a shaft 69 mounted to rotate in suitable bearings in the frame 2'. The shaft 69 carries on a hub 10, secured to the shaft, a sprocket 1l, which drives the paste rollers I4 by way of ka suitable chain 12. The hub member 68 is provided with jaws, and shaft 69 also carries a sliding operator-controlled clutch member V13, which is keyed to the shaft and cooperates with the'hub 68 to provide a driving connection of said hub to the shaft 69.

The shaft 64, above described,'carries at its outer end, secured thereto, a sprocket 15, or a triple sprocket which drives the corrugator roller 1 by `way of the chains 16. The Vcorrugator roller B is connected to the rcorrugator roller 1 through the interengagement of the Yrespective corrugations on each of the said corrugator rolls 1 and 8 and driven thereby and the presser roller 6 is driven from roller 1' by gear teeth on Aboth rollers, all in accordance with the usual practice. Rollers 4 and 5 are usually non-rota tively 'mounted though either or both, and particularly roller 5, may be mounted to rotate.

The shaft 69, connected and mountedas already described, carries at its rear end, considering the front of the machine to be that toward the observer in Figs. 8 and 9, a toothed gear 11 which turns on the shaft 59 and is driven from a toothed sprocket 18 on the rotor shaft of the small low power idling motor 19, which, at the will of the operator, drives the unit, or corrugaty ing head 2 at comparatively slow speeds providing for the idling motion already discussed.

For this purpose, the gear 11 is connected to the shaft 69 to drive the same by way of an overrunning clutch 8D, which is an automatic device, the details of which it is not considered necessary to illustrate, the over-running clutch thus employed, indicated at 88, being a well-known mechanism providing a rotary drive from which the member driven may be picked up when operated at a higher speed from another source, relieving the low-speed drive of its load, which is incident to driving said driven member. A bicycle coaster brake, or the free-wheeling mechanism of an automobile, being well-known mechanisms in which this old mechanical movement has been utilized. When gear 11 tends to turn faster than shaft 69, said shaft is driven through said gear. When the shaft 69 is driven faster than gear 11 and tends to drive said shaft, the gear 11 is released from the shaftV by clutch 66, which thus automatically disconnects the motor 19.

Figs. 10 and 11 show the pulley, or drum 53, connected to shaft 54 by a clutch 53', which is operator controlled whereby shaft '54 and the Veli) entire drive, with the exception of pulleys or drums 5I and 53 and belts 52, may be disconnected from motor 59.

Referring now to Figs. 8 and 10, and particularly to the latter, the clutch shaft 54 and the operator-controlled sliding jaw clutch members 55 and 56 and the cooperating sprockets 59 and 60, appear at the left in said figure.

In the illustration of Fig. 10, the sprocket 60, on the clutch shaft 54 which is connected to and disconnected from shaft 54 by clutch 56, drives chains 8l, which, in turn, drive a sprocket 82 on and secured to a shaft 83. This shaft 83 is mounted in suitable bearings in the frame, and carries at its outer end, secured thereto, a multiple sprocket 84 which, by way of chains 85 drives the corrugator roller 1, from which the corrugator roller 8 and the other heated rollers 4, 5, and 6 are driven in the usual manner.

Shaft 83 also carries, secured thereto, a multiple sprocket 81, driving chains 88, which, in turn, drive a'multiple sprocket 6 9' which turns on the shaft 90 mounted in the frame. This shaft is provided with a sliding jaw, operator-controlled, clutch member 9| keyed thereto and cooperating with the hub 92 of the sprocket 89, to connect the shaft 99 to the said sprocket and to the chains88.

The shaft 90 also carries, secured to its outer end, to turn therewith, a sprocket 93 which drives a chain 94, which, in turn, drives the paste rollers I4.

The shaft 90 is driven, at times, as hereinafter described, in idling, by way of an over-running clutch 95, being, in this way, subject to being picked up by the main motor 59 to which the drive is also connected, as already described. The over-running clutch 95, which may be like clutch 86, and is for the same purpose, is driven by way of a toothed gear 96, which meshes with a pinion 91, mounted on and secured to the rotor shaft of the small, low-power idling motor 98, which is thus connected to the unit, or corrugator head l to provide the idling motion already discussed, and automatically disconnected there! from when the head is driven at operating speeds in the production of corrugated board. Other automatic, or manually-controlled means, may, in the broader conception of the invention, be substituted for the over-running clutches 86 and 95, and other driving means in place of mo tors 50, 19 and 93.

The operation of the machine in the production of single face A flute, or any corresponding single face board by the operation of head No. 2, and the production of B, or any corresponding flute by the operation of head No. 1, also the operation of the machine in the production of A flute and B flute simultaneously, and in the production of double-double board, have been fully described, these operations being illustrated in Figs. 1 to 7; still other types of board being produced by variations within the scope of the invention.

Illustration Figs. 8 to 11 relates particularly to the drive which is operated primarily by the main motor 59. When this motor is in operation, the clutch member 55 being engaged and the clutch member 56 being disengaged, the entire unit 2 is operated, as in Fig. 1, for the production of A flute single face corrugated board, or whatever corrugated product the rollers may be adapted to produce. When the clutch member 55 is engaged, the clutch member 55 being disengaged, the corrugator head, or unit I, which is operated, as in Fig. 2 for the production of single face B flute corrugated board, said units respectively, in these two operations, being driven by the main motor 5U at operating speed.

When either clutch member is engaged and the other out, the unit, thus disconnected from the motor, may be operated by the corresponding low-power motor, with a slow, idling motion. If the motors 19 and 98 be in circuit at all times, each head will be picked up and driven at an idling speed by its corresponding idling motor, when disconnected from motor 50; If motor 50 be stopped, both heads would be thus driven, but the operation is not intended as regular practice. Ordinarily, the idling motors would be energized when needed. Preferably, a button switch at a convenient point is employed.

When both clutch members 55 and 56 are engaged, both units are driven simultaneously and with proper arrangement of the webs, as in Fig. 3, the two heads are operated to produce A flute and B iiute simultaneously. This operation, as already pointed out, can be used for the production of both products, i. e. A flute and B flute single face corrugated board, to be separately utilized, or for combination in double-double board, as already outlined.

When the clutch member 55 is disengaged so that the unit 2 is not driven by the main motor, the head 2 would, the idling motor 'I9 being energized and the clutch 'I3 being engaged, be picked up by and driven from the low power idling motor 19, which rotates the corrugating rollers I and 8' and the heating and presser roller 5', also the pasting rollers i4', at a slow idling speed. Rollers 4 and 5' usually are not driven. It is assumed that, according to the prevailing practice, the heated rollers are connected to a source of steam at all times during operation of either unit, so that condensation would take place and when the rollers are stationary, condensed water would accumulate in the lower sides of the rollers, giving a variation of temperature between the upper and the lowel' .sides of the rollers, and consequent warping. This motor I9, wouldv therefore, in practice, be run for a few minutes to impart to the head a slow idling motion permitting it to be warmed up and the temperature of the rollers to be equalized to overcome any warping tendency and to put the unit in operative condition, before p lacing it in operation in the production of corrugated board. This can, by the present improvement, be done while the other head is operating,

1i. e. in production, so there is no loss of time.

This slow motion, as already pointed out, is .also of great advantage in threading the paper webs as it starts the drawing of the webs from `the rolls at a low speed, permitting them to be stepped up to a higher speed when motor 50 is connected, `eliminating the tendency to break the webs under these circumstances, i. e. due to `rapid acceleration from no speed to operating lspeed.

The clutch 'it is mainly for use when the head is to be idle for a comparatively long period and .it is still not desiredto clear the paste pot and .clean the paste rolls; in other words, the open position of the clutch 13 permits the heated roll- `ers to be stationary while the pasting rollers are .operated by the idling motor 19 to keep the paste :moist and prevent accumulation and drying on the rollers.

The idling drive and the operation of and for Vthe unit I, at the right in Fig. 1 and as illustrated in Figs. 8 and 10, are substantially identical with that already described in connection with unit 2, as illustrated in Figs. 9 and 11.

It is of importance that corrugating rollers and `other heated rollers of either unit can be turned at a slow idling speed while the other unit is in production, the idle unit being thus warmed up and having the temperature of its rollers equalized and brought to the desired temperature degree, with slight expenditure of power, and no loss of the operating time of the machine. It is also important that as soon as the main motor is engaged in driving relation to and with the head, thus dled, the head will be picked up and automatically disconnected from its idling motor. The compact and convenient arrangement of the two heads is also of importance.

Important advantages of the arrangement of the heads Nos. 1 and 2, as illustrated in Figs. l to 3, arethat the webs, as threaded for any operation, can be severed and rethreaded for another operation, i. e. as between Figs. 1 and 2, to change from the production of A flute on the head No. 2 to B flute on the head No. l, without transferring the rolls or making any change other than re-threading and the shift of the drive, it being understood that either head, when idle, can be warmed up and made ready for instant operation without, in any Way, interfering with the operation of the other head, `the machine being not only more eiicient and more generallyY useful for more different operations than the prior art machines, but capable of continuous operation for the production of various types of board in immediate succession, changing from one type to the other without loss of time of the machine or the operator.

I have thus described my invention and the manner of operating the same, the description being specific and in detail in order that the manner of constructing, applying, operating and using the invention may be fully understood; however, the specific terms contained in the description are used descriptively rather than in a limiting sense, the scope of the invention being defined in the claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a machine `for making corrugated board having two corrugator heads arranged in tandem, each head having delivery means and a supply roll support, each said support having means for supporting two supply rolls in operative relation to the corresponding head, means for leading a web from a roll on each support to either head, the corrugating rollers of each head being adjacent the center of the machine and the roll supports being 4at the opposite ends of the machinej.

2. In a machine `for making corrugated board having two corrugator heads arranged in tandem, each head having delivery means and a supply roll support, yeach said support having means for supporting two supply rolls in operative relation to kthe corresponding head, means for leading a web from a roll on each support to either head, the corrugating rollers of each head being adjacent the center of the machine and the roll supports being at the opposite ends of the machine, and means for driving either head at the same operating speed as the other, said speed being suitable to the production of corrugated board.

3. A machine for making corrugated board having two corrugator heads arranged in tandem,

each head having delivery means and a supply roll support, said support having means for supporting two supply rolls in operative relation to the corresponding head, means for leading a web from a roll on each support to either head, and means for driving either head at the same operating speed as the other, said speed being suitable to the production of corrugated board, a low speed drive for each head whereby it is run at idling speed, and overrunning clutch means for each head connecting it to its low speed drive whereby each head may be driven from the corresponding low speed drive, and separate means for connecting each head to, and disconnecting it from, the operating drive which runs the respective headsy at operating speeds suitable to making corrugated board, the connection of each head to said operating drive serving by the consequent increase of speed to automatically disconnect the low speed idling drive by operation of the overrunning clutch means.

4. Ina machine for making corrugated board having two corrugator heads arranged in tandem, each head having delivery means and supply roll supporting means, each said supporting means being adapted to support two supply rolls in operativerelation to the corresponding head, means for leading a web from a roll on each support to either head, each head comprising steam heated corrugating rollers, paste rollers, steam heated rollers for feeding: and presenting the paste web tothe corrugatedV web` and pressing it against the same, the corrugator rollers of both headsV being adjacent the center of the machine and the delivery means of both machines being disposed in a single direction and closely related to each other at the topv of the machine, means for drivingv either head at the same operating speed as. the other, said speed being suited tothe production of. corrugated board, the respectiveheads. being adapted to make single face corrugated board having flutes of diierent sizes.

5. In a machine for making corrugated board,

a corrugator head having steam heated rollers, y

means for driving the head atan. operating speed suitable to the production of. corrugated board, a low speed idling drive to runA the head at a relatively 10W speed. in idling to give uniform distribution of heat preventing warping of the rolls and means for simultaneously. connecting the high speed. drilve` and disconnecting the low speed drive and for simultaneously. disconnecting the high speed drive and: connecting the lovv speed idling drive to said. headv whereby it isrun continuously but alternately at operating speed and at idling speed.

V6. The combination in a machine for making corrugated board, of two corrugator heads arranged in tandem, each head having delivery means and a supply'roll support, each said support having means for supporting two supply rolls in operative relation to the corresponding heads, the said supports being at the opposite ends of the machine and adjacent the corresponding heads, means for leading a web from a roll on each support to either head, each head head comprising steam heated corrugating rollers, paste rollers, steam heated rollers for feeding and presenting the liner web to the corrugated web and pressing it against the same, the corrugating rollers of both heads being adjacent the center of the machine and the delivery means of both machines being disposed in a single direction and closely related to each other at the top of the machine, means for driving either head at the same operating speed as the other, said speed being suited to the production of corrugated board.

7. In a machine for making corrugated board having two corrugator heads arranged in tandem, each head having delivery means and a supply roll support, each said support having means for supporting two supply rolls in operative relation to the corresponding heads, the said supports being at the opposite ends of the machine and adjacent the corresponding heads, means for leading a web from a roll on each support to either head, each head comprising steam heated corrugating rollers, paste rollers, steam heated rollers for feeding and presenting the liner web tothe corrugated web and pressing it against the same, the corrugating rollers of both heads being adjacent the center of the machine and the delivery means of both machines being disposed in a singley direction and closely related to each other at the top of the machine, means for driving either head at the same operating speed as the other, said speed being suited to the production of corrugated board, a relatively low speed driving source to. drive each head in idling, overruning clutch means for each head connecting it to the low speed driving source, the idling speed being less than said operating speed and means connecting each. head to, and disconnecting it from said operating. speed drive which is suited. to the production. of corrugated board, said latter means being under control of the operator, the overrunning clutch means of each head operating. automatically when the corresponding head is connected. to said operating speed drive to disconnect said corresponding head from its low speed idling drive.

8. The combination in a machine. for making corrugated board,` of. two corrugator heads arranged in tandem, each head having delivery means and a supply roll supporting means, said supporting means being adapted to support two supply rolls in operative relation to the corresponding heads,.means for leading a web from a roll on each support to either head, means for driving either headI at. the same operating speed as the other, said speed being suitable to the production ofcorrugatedboard, a low speed drive for each head whereby it is run at an idling i speed lower thansaid operating speed and separate means operating in connection with the drive to each head for simultaneously connecting each head to the operatingv drive and disconnecting the low speed drive and for simultaneously disconnecting the operating speed. drive and connectingy thelow. speed drive..

HENRY B. GREENWOOD.

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