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Патент USA US3067653

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Dec. 11, 1962
Filed May 1.9. 1960
2 Sheets-Sheet 1
Dec. 11, 1962
Filed May 19, 1960
2 Sheets-Sheet 2
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United rates Patent
Patented Dec. 11, 1962
adjustably mounted blades relative to said ?xed blade so,
‘I as to selectively vary the circumferential spacing between:
Henry D. Ward, Sin, Timonium, Md, assignor to Koppers
5 be in part obvious and in part speci?cally referred to in
Company, Inc., a corporation of Delaware
Filed May 19, 1960, Ser. No. 30,217
2 Claims. (Cl. 83-332)
said ?xed blade and said adjustably mounted blade.
Further objects and advantages of the invention will
the description hereinafter contained which taken in con
junction with the accompanying drawings, discloses a
preferred form of apparatus constructed to operate in
accordance with the invention. The disclosure, however,
This invention relates to the cutting and more partic
ularly to the slotting of paper and paperboard and similar 10 should be considered merely as illustrative of the prin
ciples of the invention in its broadest aspects.
material and has particular reference to the rotary type
In the drawings:
of cutter or slotter heads employed for slotting of paper
board blanks used in forming cartons or crates.
FIGURE 1 is a fragmentary view of a slotting mech
anism embodying the invention with certain of the parts
In the cutting and slotting of paperboard carton blanks,
there is conventionally employed a slotting mechanism 15 shown in cross section.
comprising a pair of parallel, spaced rotatable shafts on
which there are mounted lengthwise spaced pairs of co
acting slotting heads between which the paperboard is
The upper one of the pairs of slotting heads is
FIGURE 2 is an enlarged view, partially in cross sec
tion, of the movable blade registering device shown on
the right side of FIGURE 1.
FIGURE 3 is an end view of the blade head taken
usually provided with two radial spaced cutting blades 20 substantially along the lines III--III of FIGURE 1.
‘and the lower head is formed with a peripheral groove
FIGURE 4 is a cross section view of the blade shaft
which receives the cutting edge of the blades.
running register.
One blade cuts a slot in the leading edge and the other
blade cuts an equal length slot in trailing edges of the
blank. These slots de?ne the ?aps which are later folded
over and form the top and bottom of the container.
When the box size or the rate of feed is varied it is
necessary to valter the central angle of the circular sector
FIGURE 5 is a view taken substantially along the lines
V--V of FIGURE 2 showing the ?oating disc driving
structure of the movable blade registering device.
Referring now to the drawings there is shown a slotting
mechanism 10 embodying the present invention for vary
ing the angularity between the blades on the cutter heads.
The slotting mechanism 101 comprises a plurality of
of the blade-carrying head between the blades in order
to obtain the desired equal length of the slots. Hereto 30 coating cutting or slotting heads including cutting or
blade heads 11 which are mounted for rotation on a
fore, the blade carrying head has been constructed such
shaft 13 suitably journaled adjacent each end in frame
that one blade is ?xed thereon and the other blade is
members 15. Blades 17' and 19 carried on the blade
angularly adjustable relative to the ?xed blade by varying
heads 11 coact with aligned lower female heads 21
the central angle of the circular sector of the blade
carrying head between the ?xed and movable blades. 35 rotatable with a rotatable lower shaft (not shown) parallel
to the shaft 13. The slotting shafts are driven by a main
In this manner the slot lengths in the leading and trailing
drive geartrain of which the gear 12 for driving the
edges are adjusted to the desired and selective lengths.
shaft 13 is shown. The female heads are formed with
The usual slotting mechanism includes ?ve pairs of
a peripheral groove 23 which receives the end of the
heads of which the three intermediate pairs are employed
to form the slots de?ning the ?aps. Accordingly, the ' blades 17 and 19 such that when the paperboard blank
passes therebetween one of the blades is operative to slot
relative blade angle (circular sector) ‘between the ?xed
the leading edge of the blank and the other of the blades
and movable blades of the three upper heads must be
is operative to slot the trailing edge of the blank.
maintained equal on each of the heads such that all
In the formation of a blank for forming cartons or
three slots cut in the leading edge or in the trailing edge
boxes it is conventional to employ three of such slotting
of the paperboard blank will be of equal length. Here
heads, of which two are shown in FIGURE 1. ' The heads
tofore, when the feed or blank size change is made, the
are spaced longitudinally along the length of their respec¢
adjustment of the blade angle has been made on each
tive shafts in accordance with the dimensions of-the box
of the heads individually. Such individual adjustment,
to be formed. As heretofore discussed, the slots in the
because of human error, often times resulted in heads
leading and trailing edges of blank are equal length and
having different blade angles such that different length
the length is determined by the size box to be formed;
slots were formed in the blank. Furthermore, the in
dividual adjustment required that the machine be shut I The slots de?ne the ?aps forming the top and bottom
of the container.- When it is desired to change the size
down before it could be made.
It is an object of the present invention to provide a 55 of the box or the speed of the machine the relative angu
lar positions of the blades (central angle of the circular
means for adjusting the central angle of the circular
sector therebetween) must be varied. Usually, this may
sector between the blades on each of the heads simul
be accomplished by varying the relative angular positions
taneously and an equal amount such that there is no
variance in the circumferential spacing between the blades ' of the blades 17 and 19 on the head 11.
In accordance with the present invention it is proposed
of each of the heads.
It is another object of the present invention to provide 60 to make such blade changes on each of the heads simul
taneously and preferably while the machine is running,
a new and novel means for adjusting the blade angle be
i.e., that is without stopping the machine. To this end
tween the ?xed and movable blades on the blade head'so
one of the blades 17 is held ?xed with respect to the
as to change the length of the slots formed thereby on
the leading and trailing edges of the paperboard without 65 shaft while the other blades 19 are rotatable relative to
the shaft so that the angularity betweenthe blades 17 and
slowing down or stopping the machine.
The invention comprises generally a rotatable shaft, a
19 blade may be varied in accordance with the length
plurality of blade heads mounted on said shaft, each of
As shown in FIGURES 1-3 this is accomplished by
said heads including a blade ?xed thereto and a blade
adjustably mounted on said head and angularly spaced 70 forming each of the blade heads 11 with a hub 24 having
intermediate the ends thereof an upstanding peripheral
from said ?xed blade relative to the center of the blade
of slot desired.v
head, and means ‘for simultaneously moving each of said
?ange 25. The hub is suitably ‘held for rotation with the
shaft 13 by a key (not shown) and against lengthwise
disc 77 having open-ended slots 79 receiving driving studs
movement by a set screw 27. The blade 17 is mounted
on one face of the ?ange 25 as by screws 29. In this
manner the blade 17 is ?xed for rotation with respect to
81 carried by the spur gear 67. Fixed to the shaft as by
a set screw is a driving disc 83 having ?xed thereto in
the shaft 13.
Turnably journaled on the hub 24 is a gear 31 formed
of a plurality of arcuate segments 33 which are joined
together by splicing plates 35. The face 36 is formed
with an axial cut out 37 which receives the peripheral
?ange 25 such that the face 36 lies in the same plane as
the outer side of the ?ange. Fixed to the face 36 as by
screws 38 is the movably mounted blade 19.
Holding the gear 31 stationary on the hub 25 and there
by the movably mounted blade 19 ?xed relative to the
wardly projecting studs 85 engaging within open-ended
slots 87 which are 90 degrees out of phase with the
slots 79.
From the foregoing, it should be readily apparent that
when it is desired to change the angular relationship be
tween the movably mounted blades 19 and the ?xed blades
17 the hand wheel 69 is turned to increase or decrease
the circumferential blade spacing. The turning of hand
wheel 69 turns the sleeve 47 by way of gears 74 and 75
such that the degree of eccentricity of the eccentric por
tion 53 relative to the adjusting shaft 43 is changed. This
blade 17 is a gear 39 ?xed as by set screw 41 to a freely ro 15 change in the degree of eccentricity re?ects itself in a
tatable adjusting shaft 43 which is suitably journaled in the
phase shift between the spur gear 67 and the internal gear
frame members 15. Mounted on one end of the shaft is a
65. The phase shift is transmitted by way of the coupling
device generally designated as 45 for changing the angular
mechanism 72 to the adjusting shaft 43 and the gears 39
position of the adjusting shaft 43 with respect to the slot
?xed thereon. This movement of the adjusting shaft 43
ting mechanism shaft 13. Changing of the angular posi
and gears 39 effects a relative turning thereof in respect
tion of the adjusting shaft 43 with respect to the shaft 13
of the rotation of the blade head shaft 13. Hence, the
adjusting gears 39 meshing with the movable head gears
also turns the gear 39 ?xed to the former a corresponding
31 turns about the hubs an amount corresponding to the
amount. Such turning of the gear 39 causes the blade
carrying gear 31 meshing therewith to turn about the hub
phase shift. In this manner the blades 19 carried on the
24 ?xed to the shaft 13 and carrying the ?xed blade 17.
gears 31 are rotated relative to the blades 17 mounted on
In this manner the angular relationship between movable
the hubs 24 which are ?xed to the blade carrying shaft 13
for rotation therewith.
blade 19 and the ?xed blade 17 is changed.
In the preferred form as shown in FIGURES 1 and 3
While the above arrangement for changing the relative
a device commonly known in the art as a running register
angularity between the blades on the blade head has been
is employed to shift the angularity of the adjustment shaft
described as employing a running register, it should be
43. The running register 45 comprises a sleeve 47 turn
apparent that other means may be employed. For ex
ably supported adjacent the terminal end of the adjust
ample a hand wheel may be connected directly to the
ment shaft 43. The sleeve 47 is seated on the outer face
adjusting shaft for varying the angularity between it and
of bearings 49 ?xed on the shaft 43. Suitable means such
the blade carrying shaft. Under such circumstances,
as snap rings or the like may be employed to hold the 35 however, it may be necessary to provide releasable means
sleeve against axial movement. One end 51 of the sleeve
is formed concentric with the shaft 43 and the other end
53 is formed eccentric thereto.
for holding the gear member 31 in a selective position with
respect to hub 24. Such holding means would be capable
of being loosened when it is desired to change the blade
Mounted on bearings 55 held fast on the concentric
portion 51 is a supporting disc 57 on the face of which 40
it may also be desirable to provide means for varying
there is ?xed as by screws an annular internal gear 59
the angularity of the ?xed blades 17 with respect to the
having external gear teeth 61 meshing with a drive gear
machine driving gear 12. To this end there may be pro‘
63 fastened to the end of the blade shaft 13.
vided on the blade carrying shaft 13 a running register
Supported on bearings 64 ?xed on the eccentric portion
86 (FIGURE 4) of the type more completely described
53 and meshing with the internal teeth 65 of the annular
in my copending application Serial No. 838,330, ?led
gear 59 is a spur 67 having fewer teeth (FIGURE 5)
September 4, 1959, and now issued as Patent No.
than the number of teeth on the internal gear 65. With
2,936,952, to which reference is made for a more detailed
this relationship of the number of teeth existing between
the internal gear 65 and spur gear 67 the relative angular
The blade shaft running register is similar to that de
position of meshing engagement of teeth may be altered 50 scribed above in connection with the adjusting shaft
by changing the angle of eccentricity of the eccentric
register 45 and comprises a turnable sleeve 87 having a
portion 53 with respect to the adjusting shaft 43 as more
concentric portion 89 on which there is rotatably mounted
fully to be explained below. The alteration of the angu
an annular internal driven gear 91 having external gear
larity of the meshing engagement will hereinafter be re?
93 which meshes with drive gear 12 of main gear train.
ferred to as the phase shift.
55 Rotatably mounted on an eccentric portion 95 is a spur
' As above described the phase shift of the spur gear 67
gear 97 having a lesser number of teeth than the internal
with respect to the internal gear 59 is made by angular
gear such that a phase shift may be made upon turning
adjustments on the eccentricity of the eccentric portion
of the sleeve 87.
53 of the sleeve 47. Such adjustment may be made while
The sleeve is turned so as to vary the degree of eccen
the machine is running or stopped.
60 tricity and thereby the phase shift by a hand wheel 99
To change the eccentricity there is provided a hand
?xed to one end of the shaft 101 on the other end of
wheel 69 ?xed to one end of a shaft 71 which is suitably
which there is fastened a gear 163 meshing with an idler
journaled in the frame member 15 and an enclosure bell
gear 105 which meshes with a gear ‘107 fast to the sleeve
73. Fast on the shaft 71 is a pinion 74 meshing with a
spur gear 75 fastened as by screws to the end of the sleeve
The phase shift between the annular gear ‘91 and the
47. Upon turning of the hand wheel 69, the pinion gear
spur gear 97 is transmitted by way of a coupling device
74 turns spur gear 75 and thereby the sleeve 47 which as
109 comprising a ?oating disc 111 driven by way of studs
previously described is turnably supported on the shaft
112 projecting from the annular gear 97 and a hub 113
43,. In this manner the angle of eccentricity of the eccen
keyed to the shaft 13. Driving the hub 113 and thereby
tric portion 53 with respect to the shaft 43 is varied and
the shaft 13 are pins 115 (not shown) which seat within
a corresponding phase shift of the spur gear 67 relative
the open-ended slots of the ?oating disc 111.
to the internal gear 65 results.
In operation if it is found the ?xed blade on the head
This phase shift is transmitted to the adjusting shaft
43 and the gears 39 ?xed thereto by way of a coupling
is not properly registering with the other operating parts
of the machine, i.e. the ?xed blade is not forming the
mechanism (FIGURES 2. and 5) comprising a ?oating 75 desired length slot, the angle of eccentricity of the ec~
(e) at least one gear mounted on said adjustment shaft
centric ‘95 supporting the spur gear 97 is altered by ad
justment of the hand wheel 99. This adjustment results
in a phase shift between the spur gear 9''] and driving
gear $91 and a corresponding phase shift with respect to
the driving gear 12. Hence the blades 17 which are ?xed
relative to the rotating blade shaft 13 are also shifted
thereby to vary the length of the slot.
In this connection it is to be noted that a phase shift
of the ?xed blade 17 also results in a corresponding phase
shift in the movable blade 19 This occurs because of 10
and ?xed against rotation relative thereto,
(1) said gear being in meshing engagement with
said external gear,
(f) second means connecting said adjustment shaft
with said ?rst shaft
(1) for rotation of said adjustment shaft by said
?rst shaft and
(2) for selectively positively varying the phase
relationship between said adjustment shaft and
said ?rst shaft during rotation of said ?rst shaft
the direct driving relationship between the blade gears
31 and adjusting gears 39 on the adjusting shaft 43.
Should, however, such a corresponding shift of the mov
able blades 19 result in a difference in lengths between the
(g) third means connected to said second means to
impose on said adjustment shaft, a positive or nega
leading and trailing edge slots, the angle between the 15
tive rotational impulse to shift the phase relationship
movable blades 19 and the ?xed blades 17 may change
of the external gear with respect to the hub to there
by adjust the angular position of one blade with
as heretofore described to correct for this difference.
respect to the other
2. The slotting mechanism of claim 1 including
(it) a driving gear for said continuously rotatable ?rst
(i) fourth means connected between said driving gear
and said ?rst shaft
(1) said fourth means being operable during rota
tion of said ?rst shaft for manually selectively
What is claimed is:
1. in a slotting mechanism comprising:
(a) a continuously rotating ?rst shaft,
(b) at least one blade head mounted on and driven by
said ?rst shaft,
(c) said at least one head including
(1) a hub af?xed to said ?rst shaft for rotation
(2) a ?rst blade ?xed to said hub against rotation
relative thereto and to said ?rst shaft,
( 3) ‘a second blade,
(4) ?rst means supported on said hub for mount<
ing said second blade on said hub in rotatable 30
relationship thereto in circumferential spaced re
lation to said ?rst blade and
(5) an external gear formed -on said ?rst means
and concentric therewith,
(d) a continuously rotating adjustment shaft,
varying the angularity of said shaft in respect
to said driving gear whereby a phase shift re
sults between the ?xed said ?rst blade and said
driving gear.
References Cited in the ?le of this patent
Moritz _______________ __ Nov. 28, 1939
Bishop ________________ __ Feb. 8, 1955
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