US1992735A - Knife adjuster for cigarette machine cut-offs - Google Patents

Description

Feb. 26, 1935. w. B. BRONANDER 1,992,735

KNIFE ADJUSTER FOR CIGARETTE MACHINE CUT-OFFS *FEB-26,1935. MLB.BRONANDER KNIFE DJUSTER FORl CIGARETTE MACHINE CUT-OFFS 2 sheets-sheet 2` Filed April 19, 1953 ATI'ORN EY Patented Feb. 26, 1935 l Q VUNITED STATES PATENT OFFICE KNIFE ADJUSTER Foa CIGARETTE MACHINE oU'r-orrs Wilhelm B. Bronander, Montclair, N. J., assigner toi American Machine 8i` FoundryCompany, a corporation of New Jersey i Application Apri1 19,1933, serial'NaccasM s claims. (ci. 1an-37) This invention relates to an improved cutoff faces tangentially engages the cutting edge of for continuous rod cigarette machines, itsmain said knife, whereby said knife may be adjusted object being to provide means for adjusting the outwardly while travelling tokeep its cutting edge knife blade while the cutoff is in motion, thus in tangential relation to-said grinder and thereby `5 eliminating the necessity of I stopping` the magrind said edge. These various means and parts chine, and saving considerable time during` its may bewidely varied in` construction within the daily operation. This is achieved by attaching scope of the claims, for the particular device se-` the knife blade to a slidable guide plate engaging lected to illustrate the invention is but `one of with a screw gear shaft which is actuated by a many possible concrete embodiments of the same.-

slidable rack rod operated by means of a station- The invention, therefore, is not,to be restricted ary hand wheel, the shank of which engages with t0 the specific construction shown and described.

a bearing of said slidable rod. Anotherobject The improved .cigarette cutoff consists of a of this invention is to sharpen the knife to maincutoff disk or carrier 10 which by means of bolts tain a `predetermined curve on its cutting edge, 11 is secured to flange 12 of cutoff shaft 13 con- 15; because it has been found that a curve having a tinuously -driven from :the main drive of the minimum overlap over the ledger plate gives best cigarette machine. Carrier 10 supports, by

results. The latter is achieved by employing a means of a detachable bearing 14, the knife adstationary grinder vwhich will ,grind the same justng Shaft 15 Wheh iS equipped With a SCreW curve to the cutting edge of the knife at all times, 0r Spiral gear 16 meshing With the transverse thus assuring a clean and straight cut of the grooves of knife guide and Supporting plate 1'7 20 cigarette rod. With theseand other objects not to which is-attached the knifeblade 18 of the specifically mentioned inview, the invention con'- Wafer type- Plate 17 and knife 1,3 `are Slidably sists in certain constructions and combinations SuDDOrted in a ,guide `plate 19 Secured tothe Carhereinafter fully described and then specincally rier by SCreWS aS ShOWn in Figs. 3 `and 4. Shaft set forth in the claims hereunto appended. 15,urtherm01`e, S provided `With gear teeth 2,0 25

In theaocompanying drawings which form a, through which it is actuated by the rack teeth part of this specification and in which like char- 21 Of rOd 22 Sldably SuDDOrted by a guide bushacters of reference `indicate the same or like` ingv 23 rnOunted in the Center 0f Carrier 10. AThe parts: sliding movement of rod 22 is controlled by a Fig. 1 is a sectional side, elevation of a cigarette guide bearing' 24 100Se1y InOunted 0n a Shank 25 30 cutoff provided with the improved knife adjuster; of hand wheel 26, the threaded end 27 of shank Fig. 2 is asectional plan view of the knife ad- 25 being Supported, by a threaded bearing lue juster mechanism, the cutoff disk being shown 28 attaehed t0 the rStationary Cutoff hOuSing 29. with the knife in the upmost position; InI Order to adjust knife blade 18 while the car- Fig.f3 is a front elevation of the cutoi disk rer 10 iS in InOtOn, it iS Only required to turn 35 and the` attached knife blade; hand wheel 26 in a clockwise `direction in Fig. 6,

Fig. 4 is a bottom view of the same as seen from Whelfly due t0 the threaded mounting 0f 51121111225, line 4--4 of Fig. 3; will cause the latter to move outwardly thereby Fig. 5 is a plan view of the cutoff disk taken on effecting a Similar yJrrlovemerlt of rod 22 which,

4g line 5-5 of Fig. 3; and I through its bearing 24 is connected to shank 25. 40

Fig. 6 is a front elevation of the cutoff housing The mOVeInent 0f 10d 22, the rack teeth 21 of with the attached regulating mechanism for the which mesh with teeth 20 of shaft 15, will cause knife adjuster, taken on line 6-6 of Fig. 1 i, the latter to turn, thereby also turning screw In carrying the invention into effect there is gear `16` and causing the knife guide plate 17 4,5l provided a rotatably mountedl carrier, a wafer and knife 18 to move outwardly to the desired 4r knife slidably mounted on said, carrier, manually position, and thereby compensate for wearing of operable means for adjustingsaid knife radially the knife. Guidebearing 24 is equipped with a outward of the carrier while the latter is'rotating sleeve 30- carrying a stop lug v31 for` the purpose to compensate for wearing of the knife, and a of preventing the disengagement of guide plate 50. device for incapacitating said means whenthe 17 from spiral gear 16 Whenthe knife blade is` 50 knife is worn to the end. In `the best forms of worn down to the end, as in said position lug 31 construction contemplated there is also provided engages with `a stop pin 32. The machine then astationary cylindrical giinderhaving its axis hasto be stopped' since a new knife blade is disposed in a plane passing through the axis of required. Stop pin V:i2 is of the spring plug type said carrier, 'and arranged so that one'of its end equipped rwith compression spring 33 Vand sup- 55 ported in lug 34 of stationary housing 29. In order to insert a new knife blade 18, stop pin 32 is pulled out of the way of stop lug 31 and hand wheel 26 is turned to move the rod 22 outwardly, the stop pin 32 upon its release riding on lug 31 until it drops off lug 31. At this point, guide n plate 17 and knife blade 18 can easilybe removed and a new blade 18 attached toy plate 17 after which the latter is inserted again and the operation of stop pin 32 and hand wheel 26 is reversed until bearing 24 has reached its innermost position.

The stationary grinder (Fig. 1) consists of cylindrical grinder 35 loosely mounted on a downwardly inclined stud 36 fixed in an arm 37 attached to the side wall of housing 29. The grinder is supported in this manner, withits axis in a Vertical plane passing through the axis' of the cutoff disk 10, to tangentially engage and grind the cutting edge of the knife to a predetermined curve and bevel it as it moves over the outer end face of the grinder. Since the grinder is stationary, the cutting edge will always be ground to thersame curvature, whereby its overlap over the ledger plate may be kept down to a predetermined minimum which is just sufficient to sever the cigarette rod, and which has been found to produce more perfect cuts through the cigarette rod.

When the operator initially adjusts the knife to engage the grinder on the ledger tube the desired overlap of the cutting edge is obtained. Whenever the operator notices that the grinder is no longer grinding the cutting edge of the knife, the operator adjusts the knife outwardly to reengage the grinder without lstopping the machine, thereby keeping it in the position in which it severs the cigarette rod most efficiently.

What is claimed is:

1. In a cigarette cutoff, the combination with a rotatably mounted carrier, of a rod slidably mounted in said carrier and coaxial therewith, a knife adjusting shaft rotatably mounted in said carrier and extending diametrically thereof, said rod having rack teeth thereon and said shaft being provided with gear teeth meshing with the rack teeth of said rod; a wafer knife, a transversely grooved guide plate carrying said knife and slidably mounted on said carrier and radially adjustable thereof, and a screw gear on said shaft meshing with said grooves, whereby said rod may be moved axially outward to adjust said knife radially outward of the carrier and thereby compensate for wearing of the knifey while the carrier is rotating.

2. In a cigarette cutoff, the combination with a rotatably mounted carrier, of a rod slidably mounted in said'carrier and coaxial therewith, a knife adjusting shaft rotatably mounted in said carrier and extending diametrically thereof, said rod having rack teeth thereon and said shaft being provided with gear teeth meshing with the rack teeth of said rod, a wafer knife, a transversely grooved guide plate carrying said knife and slidably mounted on said carrier and radially adjustable thereof, a screw gear on said shaft meshing with said grooves, whereby said rod may be moved axially outward to adjust said knife radially outward of the carrier and thereby compensate for Wearing of the knife while the carrier is rotating, manually operable means for moving said rod outwardly to adjust the knife, and a device for obstructing the outward movement of said rod when the knife is worn to the end;

3. In a cigarette machine cutoff, the combination with a rotatably mounted carrier, of a rod slidably mounted in said carrier and coaxial therewith, a knife adjusting shaft rotatably mounted in said carrier and extending diametrically thereof, said rod having rack teeth thereon and said shaft being provided with gear teeth meshing with the rack teeth of said rod, a wafer knife, a transversely grooved guide plate carrying said knife and slidably mounted on said carrier and radially adjustable thereof, a screw gear on said shaft meshing with said grooves, whereby said rod may be moved axially outward to adjust said knife radially outward of the carrier and thereby compensate for wearing of the knife while the carrier is rotating, manually operable means for moving said rod outwardly to adjust the knife, and a device for obstructing the outward movement of said rod when the knife is worn yto the end, said device including a lug connected to said rod, and a stationary stop pin disposed in thepath of said lug.

4. In a cigarette cutoff, the combination with a rotatably mounted carrier, of a wafer knife slidably mounted on said carrier, manually operable means for adjusting said knife radially outward of the carrier while the latter is rotating to commovement of said rod when the knife is worn down to the end.

5. In a cigarette cutoff, the combination with a rotatably mounted carrier, of a flat wafer knife slidably mounted on said carrier and having a curved cutting edge which is eccentric to the axis of rotation of said carrier, manually operable means for adjusting said knife radially outward of the carrier while the latter is rotating to compensate for wearing of the knife, a device for incapacitating said means when the knife is worn to the end, and a stationary cylindrical grinder having its axis disposed in a plane passing through the axis of said carrier, and arranged so that one of its end faces tangentially engages the cutting edge of said knife, whereby said knife maybe adjusted outwardly while travelling to keep its cut'- ting edge in tangential relation to said grinder and thereby grind said edge.

6. In a cigarette cutoff, the combination with a rotatably mounted knife carrier, of knife supporting means mounted on said carrier for movement diametrically thereof, means for mounting a cutoff knife on said supporting means, a manually operable element relatively stationary with respect to said carrier, a rack extending axially of said carrier and rotatable therewith, gear means meshing with said rack and connected to said` knife support to move the same on movement of the rack and connections between said manually operable element and said rack to move said rack in response to actuation of said element.

7. In a cigarette cutoff, the combination with a rotatably mounted knife carrier, of knife supporting means mounted on said carrier for movement diametrically thereof, means for mounting a cutol knife on said supporting means, a manually operable element relatively stationary with respect to said carrier, a rack extending axially of said carrier and rotatable therewith, gear means meshing with said rack and connected to said knife support to movethe same on movementl of the rack and connections between said manually operable element and said rackto move said rack in response to actuation of said element, said connections including a bearing permitting free rotation of said rack relative to said element.

8. In a cigarette cutoff, the combination with a rotatably mounted knife carrier, of knife supporting means mounted on said carrier for movement diametrically thereof, means for mounting a cutoif knife on said supporting means, a manually operable element relatively stationary with respect to said carrier, an actuating bar extending justment of said element and the bar connected 10 thereto.

WILHELM B. BRONANDER.

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