US806303A - Cutting mechanism. - Google Patents

Description

PATENTED DEG. 5, 1905.

F. E. STRASBURG.

.CUTTING MECHANISM.

APPLIOATION FILED JAN. 1o, 1906.

dtorlz ey Witnesses C@ wfg/m lPATBNTED DEG. 5, 1905.

F. E. STRASBURG. I

CUTTING MBGHANISM.

APPLIUATION FILED umm, 1905.

3 SHEETS-SHEET 3.

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UNITED sTATEs PATENT oEEroE.

FREDERICK E. STRASBURG, OF RUMFORD FALLS, MAINE, ASSIGNOR .TO-

CONTINENTAL PAPER BAG COMPANY, A CORPORATION OF MAINE.

CUT-rl-Ne. MEoHANlswl.

VSpecification of' Letters Patent.

Patented Dec. 5, 190.5.

Application filed January 10, 1905. Serial No. 240,401.

Be it known that I, FREDERICK E. STRAS- BURG., a citizen of the United States, residing at Rumford Falls, in the county ofOxford and State of Maine, have invented certainnew and useful Improvements in Cutting.

Mechanism, of which the following is a specification.

This invention relates to cutting mechanism, particularly to that class of such mechanismas is employed for severing a continuous web of paper into blanks or sections of -uniform and predetermined length.

of arrow B, Fig. 1, of the striker andthe mechanism for the actuation thereof. Fig.

4 is an enlarged cross-section on line a a, Fig.

2, of the float, knife, and striker.

My invention is peculiarly applicable in connection with paper-bag machines in which it is desired to sever a continuous paper tube into lengths suitable for ba -blanks. Such paper vtubing may be a Simp e flat tube or it may be provided with an inwardly-folded tuck in each side thereof.

The machine set forth in the drawin s comprises side frames 2 3, in which may e-supported the various parts of the mechanism.

At 1 in the left-hand end of the machine, Figs. 1 and 2, is shown the delivery end of some suitable tube-forming mechanism. In the present instance this mechanism is illustrated as ada ted to form paper tubin having inwardlyolded tucks in each side t ereof and comprises as one of its 'elements a float 4, -necked down at 6 to pass through an opening between feed rolls 7 8. This opening is' formed by oppositely-disposed reduced portions 9 in said rolls. Float 4 lies within the -tucked paper tube and above the inwardlyby bolts 12 to` cross-bar 11, and the ends of said cross-bar are supported in brackets 15 16, springing from uprights 13 14. Knife 10 speeds.

-upon shafts 18 19, supported in suitable bearings'36 in uprights 13 14 on side frames 2 3, respectively. Somewhat in advance of rolls 47 8 and to the right hand, Figs. 1 and2, of

serrated edges 5 and 17 is a second pair of feed-rolls 21 22, mounted upon shafts 23 24, turning in suitable boxes in uprights 25 26 on frames 2 3, respectively.l Shaft 24 is preferably -mounted in stationary bearings in said uprights ;V but shaft 23 I vprefer to support in vertically-slidable boxes 20, and which boxes may be urged downwardly by springs 27 The tension of said springs may be governed by means of screws 28. Upper shaft 18, `carrying roll 7, is mounted in slidable boxes urged downwardly by springs, all similar in construction and operation, respectively, to the arts just described in connection with sha t 23.

` The driving mechanism of the machine is as follows: Mounted in boxes 29 30 on side frames 2 3, respectively, is main shaft 31. On the rearward end of said shaft is mounted pulley 32 and gear 33. Said gear meshes with intermediate gear 34', which in turn meshes with gear 35 on shaft 19. Shaft 18 is provided with gear 37 for engagement with gear 35. Shafts23 24 are provided with intermeshing gears 39 40, respectively, and

gear 40 is driven from gear 35 through intermediate 38. Rolls 7 8 and 21 22 are illustrated asvall of one diameter, and the gears just described are so proportioned as to cause said rolls to revolve with equal surface On the forward end of main shaft 31 is secured miter-gear 41, meshing with a similar miter gear 42 on shaft 43, supported at right angles to main shaft 3l in brackets 44 45. Power may be communicated to pulley 32 by means of the usual belt. (Not shown.)

Intermediate the two pairs of feed-rolls 7 8 and 21 22 and having its path of action in a plane contiguousv to the serrated edge of knife or blade 10 and float 4 is mounted striker 46 for severing, in. connection with IOO said blade and float, any paper web or tube that may be fed thereto. The paper-tubeforming mechanism, feed-rolls, blacle and float hereinb'efore described are old in the art,

and I do not claimthem as my invention.l

My invention pertains to the striker and particularly to an improved mechanism for operating it. The major part of said inechanism is mounted upon bracket 45, outstanding from and fast to side frame 2. On shaft 43 in said bracket is fixed gear 47, meshing on the one side with gear 48 and on the other side with gear 49, said gears 48 49 also being pivotally mounted in bracket on shafts 50 51, respectively. Upon the forward end of shaft 50 is mounted crank-disk 52, bearing a crank-pin 53. On said pin is mounted a slidable block 55, having the longer pair of its opposite sides suitably grooved for engagement with ribs 56 on the inside of slot 57 in arm 54. By means of said crank arm 54 may be oscillated on pivot 58 in bracket 59 toward and awayfrom the path of the paper to be severed. Upon the forward lend of shaft 51 is mounted another crank-disk 60, similar to disk 52 on shaft 50. Crank-disk 60 is provided with a hole 61, eccentric to the axis of rotation of said disk, and in said hole 61 is mounted pivotpin 62 of grooved block 63. Groove 64 in said block is preferably provided with undercut sides 65 for sliding engagement with eomplementarily-fashioned sides 67 of shank portion 66 of striker 46. The rearward end 70 of striker 46 is pivoted within the bifurcated free end of lever 54 on bolt 68.

'By means of the mechanism just described the cutting edge 71 of striker 46 may be driven upwardly at high speed across the path of the paper web or tube and then witbdrawn and moved backwardly and downwardly at slower speed around that path to repeat the operation, as indicated by the dotted line P, Fig. 3. At 46fL said striker is shown in dot-and-dash lines in one position of its backward path.

The operation of my improved machine is as follows: The web of paper or paper tubing having been fed into the machine between rolls 7 8 and forwardly beyond serrated edges 5 and 17 and into the grip of rolls 21 22, power is applied and the machine started. The paper thereupon is moved forwardly by means of said rolls, and striker 46 moves upwardly toward the position shown in Fig. 3. At this time crank-pin 53 is at the right of axis 50, and arm 54 is thereby-swung to the right on its pivot 58, and through connecting-pivot 68 striker 46 is slid to the right in block 63, with its cutting edge 71 ready to engage the paper as said paper passes off float 4 and under edge 17 of knife 10. At the same time crank-pin 62 of grooved block 63 is moving upwardly at the left-hand side of axis 51, thereby' causing said striker 46 to move upwardly, as indicated in Fig. 3. Furthermore,said striker will travel at relatively high'speed at this portion of its stroke because of the nearness of crank-pin 62 to pivot-pin 68. Continuing its upward travel,

said striker will engage the paper at high speed and sever it against the edges of the float and knife, the paper being in the grip of the two pairs of rolls 7 8 and 21 22. Said striker will then continue its upward movement until crank-pin 62 reaches a position directly over axis 51, Fig. 3, and at which time crank-pin 53 will have reached a position directly below axis 50. The striker will then have moved to dotted position 46l and point 75 thereof will have reached position. j) in the dot-and-dash path of Fig. 3. Crankpins 62 and 53 continuing their respective rotations, striker 46 will be withdrawn to the left and downwardly at a comparatively sl ow speed and then moved forwardly and still downwardly back to position y) p, Fig. 3,`

ready to repeat the operation just described.

l claim- 1. The combination of a knife, a striker slidably mounted in a bearing, said bearing pivotally mounted for movement in a circular path, an oscillatable arm, the rear end of said striker pivoted to the free end of said. arm, means to cause the bearing to travel in a circular path and means to oscillate the arm, all combined and operating together substantially as described.

2. The combination of a knife, a striker Yslidably mounted on a crank, an oscillatable arm, one end of the striker being pivoted to the free end of the arm, and a second crank to oscillate the arm, all combined and operate ing together substantially as described.

3. The combination of a knife, a striker mounted for universal plane movement in the plane of its length, an oscillatable arm, the rear end of the striker being pivoted to the free end of said arm, means to oscillate the arm and means to oscillate the striker substantially normal thereto, all combined and operating together substantially as described.

4. rl`he combination of a knife, a striker 46 mounted for universal plane movement in the plane of its length, a crank to oscillate the striker, an arm 54 having one end pivoted at 58 and the other end pivoted to the striker, and a second crank to oscillate the arm, all combined and operating together substantially as described.

5. The combination of a knife, two cranks, a striker slidably mounted on one of the cranks, an oscillatable arm. actuated by the other crank and means to slide the striker from the oscillatable arm, all combined and operating together substantially as described.

Signed at Rumford Falls, in the county of Oxford and State of Maine, this 6th day of January, 1905, in the presence of two subscribing witnesses.

FREDERICK E. STRASBURG.

Witnesses HAROLD Sinrnwick, THEO. HAWLEY.

IOO

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