US2188282A - Wrapper mechanism - Google Patents

Description

Jan. 23, 1940.

C. J. MALHIOT WRAPPER MECHANISM Filed July 5, 1938 2 Sheets-Sheet 1 INVENTOR. CLm-ence J. MaLh'Lot @amf m ATTORNEYS.

Jan. 23,1940. 0. J. MALHIOT 2,188,282

WRAPPER MECHANISM Filed July 5, 1938 2 Sheets-Sheet 2 560' ONE REVOLUTION 6F MACHINE 1 LEI H In L a H Z i :n 3 i\ E z 8' Z 2 z 3 o v INVENTOR.

' CLar-ence J. Malhlo't BY; z'acmv l'i sw-uoa e53: so m Auac'iin waanwaad ATTORNEYS Patented Jan. 23, 1940 UNITED STATE waAPrEa MECHANISM Clarence J. Malhiot, Oak Park, 111., assignor to Bedlngto n 00., Chicago, Ill., a corporatlon Application July 5, 1938, Serial No. 217,495

4Claims.

This invention relates to wrapping machines in general and particularly to machines of the class which cut wrappers from a continuously moving web which are then wrapped about an article. More specifically, the invention relates to a feed or discharge means for machines of the latter type.

The primary object of the invention is the provision of new and improved discharge means so that a cut wrapper will be speedily removed from the cutting apparatus where it is to be used to wrap a package, so that there will be no interference of the feeding and cutting operation of the next succeeding wrapper to be cut.

A further object of the invention is the provision of discharge feed means which will in-' crease its speed of operation or rotation immediately after the wrapper is cut from the web so that the cut web will be quickly moved out 'of the path of the oncoming web from which another wrapper is to be cut.

Still another object of the invention is the provision of discharge feed means which is correlated with other moving parts of the machine so that all the parts will operate synchronously but which will increase its speed at a predetermined time, such as immediately after the cutting operation, so that a cut wrapper will be speedily moved away from the cutting knives to prevent interference with the oncoming web, but at the same time will lag during other'positions whereby a continuously synchronized feed discharge means will automatically slow or increase its speed depending upon the position of other working parts of the machine.

A still further object of the invention is the provision of discharge feed mechanism arranged in the form of an attachment or addition to wrapping machines and being applicable for both existing and new machines and operating synchronously with other operating parts of the machine so that at definite periodical intervals the speed of the feed discharge will be increased F to remove a cut wrapper so as not to interfere with additional or subsequent operations of the machine to which the attachment or addition is 55 Fig. 1 is a detail elevational view of a part of a machine or an attachment for a machine and embodying the invention;

Fig. 2 is a detail elevational view of the left end of the machine;

Fig. 3 is a detail sectional view on the line 5 2-3 of Fig. l;

Fig. 4 is a detail sectional view similar to Fig. 3, showing some of the lower gear mechanism in one position;

Fig. dis a view similar to Fig. 4, showing the parts in a different position; and

Fig; 6 is'a graphical representation of the ve-. locity of the feed rolls.

The structure herein shown for the purpose of illustrating the invention comprises a frame or support III which may be part of the wrapping machine or wrapper making machine frame. The'invention herein disclosed is particularly applicable for a wrapper making machine provided with means for applying the made wrapper U about a package or article. The essence of the particular invention, therefore, is the provision of discharge means for discharging the finished cut wrapper at an accelerated speed so that the finished wrapper will be out of the way and ll moved to wrapping position by the time the next wrapper is being cut.

-The machine frame l0 supports an upper feed roll shaft upon which there is mounted a feed roller l2, Fig. 2. The feed roller |2 carries and 80 is driven by a gear l3 which meshes with a gear It on a feed roller shaft IS. The shaft l5 carries a feed roller |6 which is arranged to the right of the feed roll l2, Fig. 2, and in contacting relationship to feed a web of wrapping material 25 to the cutting rollers l1 and I8, Figs. 1 and 2. The shaft 15 for the feed roller I6 is carried by brackets l9 which are mounted on a stationary shaft 20. The brackets l9 each comprise arms 2| and 22, there being lost motion between the 0 arms 2| and 22.

A spring 23 is arranged between parts of the arms 2| and 22 to urge the feed roller l6 into feeding contact with the feed roller l2. The arm 22 of the bracket I9 revolubly receives the shafts 20 and I5, while the bracket arm 2| is fixed to the shaft 20. The spring 23, therefore, urges the bracket arm 22 away from the bracket arm 2| or toward the left, as shown in Fig. 2. The arm 2| may be locked to the stationary shaft 20 in any convenient manner, such as by a set screw 24.

The shaft H for the feed roller l2 has a gear 25 fixed thereto which meshes with an idler gear 28 and drives the feed roll [2 and its companion u g feed roll IS. The idler gear meshes with a driv; en gear 21 fixed to a shaft 39 which,carries the cutter roll l1, Figs. 1 and 2. The cutter roll shaft 28 carries a gear 29 which meshes with a companion gear, not shown, on the shaft 30 which carries the cutter roll II. The feed rolls l2 and I6, therefore, rotate synchronously with the cutter rolls l1 and I8.

The web of material, therefore, is fed by the feed rolls l2 and I6 to the cutter rolls l1 and I3 where it is cut by the cutter blades l1 and I9. The piece of cut web or wrapper then passes to the lower discharge feed rolls 3| and 32, Figs. 1 and 2. The feed roll 3| is mounted on a shaft 33 which carries a gear 34 driven by a gear 35 by means of an idler gear 35a, Fig, 3. The shaft 33 also has fixed thereto a gear 36 which meshes with a companion gear 31 mounted on a shaft 38 which carries the companion feed roll 32.

The shaft 38 is revolubly supported in bracket arms 39 which arms are slightly swingingly or rockingly mounted, there being a spring 49 arranged between a part of the swinging arms 39 and a rigid portion 4| of the frame to urge the shaft 38 in a predetermined direction toward the shaft 33 and maintaining the gears 36 and 31 in meshing relation.

The gear 35 is rotatably mounted on a shaft 42 and this gear 35 is driven by a roller 43 mounted on a pin 44 fixed to the gear 35. This roller 43 and pin 44 are located a predetermined distance from the axial center line of the gear 35 and shaft 42, as clearly shown in Figs. 3, 4, and 5. The roller 43 and pin 44 extend into a channelshaped block 45 having a guideway 46. The roller 43 and stud or pin 44 operate in the guideway 46 of the block 45. The block 45 is driven by a gear 41 which meshes with the driven gear 21, the gear 4! being rotatably mounted on a shaft 48. The block 45 is fixed to the gear 41 so that during rotation of the gear 41 the block 45 will rotate with it, and due to the roller connection on the gear 35 with the block 45, rotation of the gear 35 is assured. Inasmuch as the roller is located to one side, there will occur a sliding movement of the guideway 45 and the block 45 with respect to the roller 43. Therefore, during rotation of the gear 41 the roller 43 will assume difierent positions with respect to the ends of the block 45 whereby the gear 35 will be caused to rotate at various speeds. When the roller 43 is in one extreme position with respect to the guideway 46 the gear 35 will rotate at arelatively slow speed, but when the roller is in the other extreme position of the guide way the gear 35 will be caused to rotate at a high speed. Therefore, the speed of the gear 35 is variable, and inasmuch as the gear 35 rotates the gear 34, the speed of the gear 34'will be variable. Be-

cause the gear 34 is of a smaller diameter than the gear 35, the gear 35 will accelerate from its minimum speed to a predetermined maximum speed and then decelerate to its minimum speed again in one complete cycle of the machine. The gear 35 being driven by the gear 34, of course will operate at exactly the same speed as the gear 34. Therefore, the discharge feed rollers 32 and 3| will rotate at the same speed as the gear 34.

In Fig. 6 there is a graph showing the speed of the feed rollers. As may be seen, the normal speed of the web, or the speed at which the rollers l2 and Hi are feeding the web, is intermediate the minimum and maximum speed of the variably driven discharge feed rollers 3| and 32 and preferably close to the minimum speed.

This normal speed is determined by the position of the roller 43 in the block 45 when the roller is close to one extreme position of the block. The maximum speed of the feed rollers 3| and 32 occurs when the roller 43 is at the other extreme end of the block 45. Therefore, the graph indicates the variable speed attained by the gear 35, and inasmuch as the gear 35 causes the rotation of the feed rollers 3| and 32, the feed rollers will rotate at a relatively slow speed for a certain period of time and then increase their speed.. The graph, therefore, indicates the speed attained by the gear 35 during one complete rotation thereof.

The chain of gears disclosed in Fig. 3, including the driving connection between the gear 41 and the gear 35, is synchronized so that the speed of the discharge feed rollers 3| and 32 will be substantially equal to the normal speed of the web when a wrapper is out, which will be when the knives l1 and I8 are in the position shown in Fig. 2, and will then immediately increase so that the web will be carried away at a speed increasingly greater than the normal speed of theweb.

The mechanism herein disclosed is adapted to be applied to machines whereby a package or article wrapper is cut from a running web. Therefore, it is very desirable that the cut web or wrapper be removed out of position as soon as possible and transported to the place where the wrapping is to occur. No interference with the oncoming web, which is to be later cut, therefore occurs. If the feed rollers 3| and 32 were operating at a continuous high speed, there would be a tendency of the wrapper to be shifted, displaced, or probably torn, due to the fact that the cutting action of the cutters is not instantaneous, but in the nature of a shearing action progressing from one side of the web to the other as the web moves forwardly. It has been found to be very advantagous to have the cut wrapper removed from the cutting station and transported to the wrapping station as quickly as possible and immediately after the cutting operation.

The invention therefore provides correlated, synchronized, positively operating variable speed mechanism for removing the cut wrapper immediately after the cutting operation. The invention discloses simple, highly efficient and inexpensive mechanism for accomplishing the variable speed rotation of the discharge feed rollers.

Changes may be made in the form, construc-.

tion and arrangement of parts without departing from the spirit of the invention or sacrificing any of its advantages, and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

The invention is hereby claimed as follows:

1. In combination, means for feeding a web of material, cutters for cutting sheets from the web, discharge feed means for removing the cut sheets from cutting position, and means for driving the discharge feed means at a variable peripheral speed increasing immediately upon the completion of the cutting operation.

2. In a wrapping machine, means for feeding a web of material for forming wrappers, cutters for cutting a wrapper from the web, means for operating the cutters at a constant predetermined web speed, a discharge feed roller for moving a wrapper cut from the web by said cutters, and means driving said discharge feed roller at substantially the speed of the web during the cutting operation and accelerating the speed of the discharge feed roller immediately after the cutting operation.

3. In combination, means for feeding a web of material at a substantially uniform speed, rotary cutters between which said web is fed by said feeding means for cuttingsheets from the web, means for rotating the cutters at a peripheral speed substantially equal to the speed oi. the web, discharge feed rollers between which said web is fed from the cutters for conveying a sheet cut from the web by said cutters, means for rotating the discharge feed rollers at substantially the speed of the web during the cutting operation and accelerating the speed of the discharge feed rollers immediately upon completion of the cutting operation.

4. In a wrapping machine, means for feeding a web of wrapping material at a substantially uniform speed, rotary cutters between which said web is fed by said feeding means for cutting a wrapper from the web, means for rotating the cutters at a substantially constant peripheral speed substantially equal to the speed of the web, a discharge feed roller to which the web is fed from the cutters for conveying a wrapper cut from the web by said cutters, and means for rotating the discharge teed roller including a driving connection between thecutting means and discharge feed roller for rotating the discharge feed roller at substantially the speed of the web during the cutting operation and periodically accelerating the discharge feed roller as the cutters complete the severance of a wrapper from the web.

CLARENCE J. MALHIO I'.

Images