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Патент USA US2407239

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~ sept. 1o, 1946;
2,407,239
A. J. ALBRECHT
FRICTION DRIVE FOR WEB PROPELLING ROLLERS
Filed oct. 9, 1942
3 SheetsfSh‘egt 1_
Sept l0, w46@
A. J. ALBRECHT
2,4075239
FRICTION DRIVE FOR WEB PROPELLING ROLLERS ,
-
Filed oct.4 9, 1942
"
3 Sheets-Sheet 2
ATTORI/VFY
Sept» l0, 1946-
A. J. ALBRECHT
2,407,239
,FRICTION DRIVE FOR WEB ¿PROPELLING ROÍI'JLIÍÍRSl
Filed 001'.. 9, 1942
Y
3 Sheets-Sheet 5
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555
57
55
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635
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INVENTOR.
-» Meana/»0m ¿ju @lßßfceoê/Uj
Patented Sept. 10, 1946
2,407,239 ’
UNITED NSTATES PATENT OFFICE
FRICTION DRIVE FOR WEB PROPELLING ,
ROLLERS
‘
, Alexander J. Albrecht, West New York, N. J., as
signor to R. Hoe & Co., Inc., New York, N. Y., a
corporation of New York
Application October 9, 1942, Serial No. 461,477
(ol. avi-2.3) '
This invention relates to web-propelling and
folding rollers for use in printing machines, and
more particularly to an improved slip clutch or
drive mechanism for yieldingly driving a rotat
able web or sheet engaging member from a posi
tively driven rotary drive.
In propelling and folding webs or sheets of
paper or other fiexible‘material in modern print
ing machines, it is highly advantageous to em
2
a normally flat relatively thin, spring ring sur
rounding the shaft and engaging the friction
member, and a nut adjustable on the shaft and
engaging the spring ring to exert force there
against, to bias the friction member axially `into
engagement with the driven member and thereby
yieldingly rotate the web engaging member.
An additional object of this invention is to
provide an improved friction drive vor clutch for
ploy rollers herein referred to as web engaging 10 web propelling or folding rollers for use in print
rollers which have frictionally driven components
ing machines, each roller including a rotatable
or radially yieldable frictionally driven compo
shaft, a friction member rotatable with the shaft
nents which engage the Webs or sheets, vsaid com
and movable axially thereon, a rotatable web en
ponente being yieldably driven so that their pe
gaging member or roller supported by the shaft,
ripheral speed will conform to the linear speed
a rotary positively driven member supported by
of the engaged webs or sheets, independently of
the shaft, a normally flat spring ring surround
the operating speed of the drive. Such mecha
ing the shaft and having a peripheral portion en
nisms are disclosed in United States Patents of
gaging the friction member, and an adjusting nut
Fred Gitzendanner No. 1,827,359, granted October
movable along the shaft and engaging the spring
13, 1931, and William` F. Huck No. 2,291,627, 20 ring to exert pressure thereagainst, to bias the
granted August 4, 1942.
l
>
l
friction member into frictional engagement with
It is, therefore, an object of this invention to
the driven member and thereby yieldingly rotate
provide an improved drive or clutch for web pro
the web engaging member so that the peripheral
pelling, nipping or folding rollers for use in print
speed of theweb engaging member conforms to
ing machines in whichwebs and sheets that may , the linear speed of the engaged web.
be cut from webs are propelled through the ma
It is also an object of this invention to provide
chine, and in which the improved clutch friction
a roller and drive of generally improved con
ally connects a positively driven rotary drive with
struction, whereby the device Will be simple, du
a rotary web engaging member to yieldingly drive
rable and inexpensive in construction, as well as
the web engaging member so that the peripheral 30 convenient, practical, serviceable and efficient in
speed of the web engaging member conforms to
its use.
`
the linear speed ofthe engaged Web or sheets.r
With the foregoing and other objects in view,
Another` object of this invention. is .to provide
which will appear as the description proceeds,
an improved friction drive or clutch for web pro
the invention resides in the combination and ar
pelling or folding rollers for use -in printing ma 25 rangement of parts and in the details of con
chines, each roller including- a rotatable shaft, a
struction hereinafter described and claimed, it
friction member `rotatable with the shaft and
being understood that various changes in form,
movable axially thereon, a rotatable web engag
proportion and minor details of construction may
ing member or roller supported bytheshaft, a
be made within the scope of the. claims without
rotary positively driven member supported i by 40 departing from the spirit or sacrificing any ad
the shaft, and means supported by the-shaft for
vantages of the invention.
biasing the frictio-n member into engagement with
For a complete disclosure of the invention, a
the driven member to thereby yieldingly drive
detailed description thereof will now be given in
the web engaging member, the said bias-impart
connection with the accompanying drawings
ing means being constructed and arranged to
forming a part of the specification, wherein:
occupy the minimum axial space relative to the
Figure 1 is a partly sectional view in a hori
zontal plane, and depicting improved web pro
A further object of this invention is to provide
pelling or folding-off rollers for use in a printing
an improved friction drive or clutch` for >web pro
machine;
pelling or folding rollers for use `inprinting ma
Figure 2 is a vertical sectional View taken on
chines, each roller including a rotatable shaft, a
the line 2-2 of Figure 1, and diagrammatically
shaft.
i
i
'
Y
,
,
friction member rotatable withgthe shaftV and
depicting the cooperable relationship between the
improved folding-off rollers and the conventional
folding cylinder of a printing machine;
positively driven member supported by the shaft, 55 Figure 3 is a fragmental longitudinal sectional
movable axially thereon, a rotatable web engaging
member or roller supported by the shaft, a rotary
2,407,239
3
4
view depicting a slight modification in a compo
nent of the folding-off roller;
its inner edge engages the annular flange 3S of
the slidable collar 25 which forms a seat for it.
Figure 4 is a vertical sectional view taken on
The adjusting nut 3l is normally held against
the line 4-4 of Figure l.
Figure 5 is a fragmental longitudinal sectional
View, parts appearing in elevation, depicting mod
rotation relative to the shaft I5 by means of
plungers 36, which are slidably movable in ra
dially-extending apertures 31 formed in the nut.
ified web propelling or nipping rollers; and
Each plunger 35 receives a helical extension
Figure 6 is a fragmental longitudinal sectional
View taken through an improved web propelling
spring 38 therein, and the outer end of each
or drag roller of a printing machine.
spring engages a flat portion 4i] formed on a re
10 taining pin 4I, so that the beveled inner end of
each plunger 36 is yieldingly forced into engage
ment with axially-extending grooves 42 cut in the
shaft I5. Each pin 4l is received within a cylin
parts, there is depicted, in Figures l and 2, .co
drical >aperture 43 formed in the nut 3i, and also
acting folding-off or nipping rollers II), which
cooperate with a conventional folding cylinder 15 in a_longitudinally-extending recess 44 formed in
the outer end of each plunger 35 to hold the
Il, which is diagrammatically depicted in Fig
plunger against rotation, so that the beveled in
ure 2, to receive sheets therefrom, and to fold
ner end of each plunger will be disposed parallel
them transversely, in conformity with the usual
with the grooves 42 in the shaft I5. By this ar
practice well understood by those skilled in the
art. A conventional folding blade I2, operably 20 rangement the nut 3| is held in any selected
angular position relative to the shaft I5, for a
supported by the folding cylinder II, tucks the
reason to be hereinafter explained. Although
sheets carried by the folding cylinder to a point
the nut 3l is normally held against rotation on
between the coacting folding-off rollers I5 where
the shaft I5,- it may be rotated relative thereto
the sheets S are folded transversely. Finally the
sheets are fed or propelled to the conventional 25 by applying suflicient turning force to the nut to
overcome the restraint of the yieldable plungers
delivery mechanism, not shown.
36; therefore the nut 3| is preferably provided
Each improved folding-off roller I@ includes
with holes 34 for the reception of a Spanner
a shaft I 5 which has its terminals rotatably sup
wrench, not shown, in order that the wrench
ported in bearings carried by the machine frame
I1, which bearings may be of any preferred type. 30 may be employed to rotate the nut against the
restraining action of the plungers. |As the nut
In conformity with general practice, it is desirn
3l rotates, its threads move longitudinally along
able that at least one of the rollers Iß be sup
the threads of the shaft l5, so that the longitu
ported in yieldable bearings in order to prevent
dinal position of the nut on the shaft may be ad
damage to the machine in case of a choke. As
herein shown, the shaft I5 of one of the rollers 35 justed to exert the required force on the periph
eral portion of the spring ring 35, for a purpose
Ill is supported in blocks I6 each fitted to slide
to be hereinafter given.
in an aperture in the frame I1, and these blocks
Two roller rings or bearers 45 are located ad
are each pressed by a spring I3 to yieldingly hold
jacent each terminal of the shaft I5, and each
it in one end of the aperture. The other shaft I5,
as herein shown, is supported in bearing bush 40 bearer is T-shaped in cross section to provide a
widened peripheral portion 46 and an inwardly
ings ISa each of which in turn is carried by an
projecting flange 41. The annular faces of the
eccentric bushing I4, rotation of which permits
flanges 41 of the bearers 45 engage flat annular
adjustment of the separation of the rollers Ii)
bearing or friction rings 46 which are secured to
to provide for variation in thickness of the prod
the fixed and slidable collars 2! and 25. The
ucts passing between them. Each shaft I5 has
rings 48 are preferably formed of bronze or other
a pinion I8 keyed or otherwise secured thereto,
suitable wear-resisting material. Although the
and these pinions intermesh so that both shafts
two bearers 45 are preferably provided at each
I5 rotate in unison. Any suitable means may be
end of each composite folding-off roller, it is to
employed to drive the pinions I8, and in the pres
be understood that any desired number of bearers
ent arrangement there is depicted a gear 20
may be used.
which meshes with one of the pinions I I5, and this
A spacing sleeve 50 surrounds the shaft I5 in
gear may be driven by any suitable drive com
termediate the bearers 45 of each paii` of bear
ponent, not shown, of the machine.
ers, and each sleeve 50 has bearing or friction
Each shaft I5 has a ñxed collar 2| threadedly
1A rings 48 secured to its faces, which rings engage
secured thereto adjacent one terminal, as indi
the flanges 41 of the bearers 45.
l
cated at 22, and the collar 2l is held against ro
A plurality of sleeves 52 are supported on the
tation relative to the shaft by a set screw 23. A
shaft I5 between the inner bearers 45, and the
slidable collar 25 surrounds the shaft I5 adjacent
sleeves 5I) and 52 are mounted for free longi
its opposite terminal, and although this collar is
tudinal movement 0n the shaft I5, but they are
free to slide longitudinally along the shaft, it is
held against rotation relative thereto by pins 26
held against rotative movement relative thereto
which are received in apertures formed in the
by pins or keys 26 which are received within
sleeves 50 and 52, and their rectangular heads 21
apertures formed in the collar. Each pin is pro
are received within the keyways 23. The outer
vided with an enlarged rectangular head 21
which is slidably received in a keyway 28 formed -.', face of each outer sleeve 52 has a bearing or
friction ring 48 secured thereto, and these rings
in the shaft I5. The outer face of the slidable
engage the flanges 41 of the inner bearers 45.
collar 25 is provided with a flange or projection
Any preferred number of sleeves 52 may be pro30, which cooperates with components of the de
vided for each composite roller, and the end
vice hereinafter disclosed.
face of one sleeve abuts the end face of the ad
An adjusting nut 3l is threadedly secured to
jacent sleeve to thereby space the bearer rings
the shaft I5, as indicated at 32, and a flange or
45 a predetermined distance apart. The sleeves
projection 33 extends inwardly from the periph
5I) and 52 have recesses 53 formed in their pe
eral portion of this nut. This flange 33 engages
ripheral portions in order that the conventional
and forms a seat for the outer edge of a flat
Referring to the drawings, in which similar
reference characters designate corresponding
spring ring 35, which surrounds the shaft I5, and
sheet-holding pins 5I, diagrammatically indicat~
t
~
2,407,239
5
ed in Figure 2, may freely pass the folding-pff
rollers during the operation of the machine. The
operation and function of the pins 5I are well
known and understood by those skilled in the
art, consequently therdiagrammatic illustration
6
spring ring is very small, and additlonalloading
is evenly distributed over the loading members.
If a helical spring is employed, the loading of
the friction member is uneven due to the diiiiculty
of forming the spring terminals so that they are
accurately perpendicular to their axes, and be
cause irregularities at the dead ends of these
is sutûcient for this application.
The` outer diameter of each bearer 45 is slight
ly greater' than the outer diameter of the sleeves
springs localize the load and cause uneven load
52, and the inner diameter of each bearer 45
ing. When a plurality of helical springs are em
is somewhat greater than .the diameter of the 10 ployed, they are not usually uniform and conse
shaft I5, so‘that the bearers are supported on \
the shaft in floating relation, for a purpose to be
hereinafter set forth.
-
quently impart unequal forces which prevent their
proper functioning.
Although a number of sleeves are preferably~
The degree of adjusting movement of the nut
employed in rollers of this character, it is to be
3| may be readily determined by a calibrated 15 understood, of course, that a single sleeve may
arrangement which includes a scale inscribed on ‘ >be'interposed between the inner bearers 45.
the periphery cfa projection 55 which extends
In some instances, it is desirable to provide the
axially from the nut 3 I. 'I'he scale includes num
adjusting mechanism at each end of each roller
bered graduated lines or marks 55 arranged to
I5, so that more tension may be imparted to the
register with an index 5'I inscribed on the shaft 20 bearers 45 at one end of the roller It) than at the
I5. By this arrangement, the nut 3| may be
other, In such arrangement, the sleeve 52‘1L (Fig
readily adjusted to any selected angular posi
ure 3) is securely locked to the shaft by a set
tion with relation to the shaft I5.
screw 54, or other suitable securing means.
In the operation of the improved folding-off
Again a single sleeve may be positioned between
rollers I0, the cooperating bearers 45 of the op 25 the inner bearers 45, and locked to the shaft I5
posed folding-off rollers engage the sheets S and
in a manner disclosed in Figure 3.
propel them from‘the point of delivery` by the
A modiñed form of the invention is depicted
folding `blade I2 past the bite of the bearers 45,
in Figure 5, in which the invention is incorpo
where the sheets are folded, and then deposit
rated in web propelling or nipping rollers 59 usu
the sheets on a conventional conveyor, not shown.A 30 ally employed in printing machine folders below
Inasmuch as the bearers 45 are of greater diam
the conventional former, the use and function
eter than the folding-off rollers, these bearers are
of such rollers being well understood by those
constantly forced `into engagement with the
skilled in the art.
l
sheets, irrespective of the thickness of the prod
Each roller 59 includes a driven shaft I5a which
uct. The folding-olf rollers are preferably ad 35 has a cylindrical sleeve EI) rigidly secured there
justed so that the outer periphera1 faces of the
to by a set screw 6|, which is threaded through
sleeves 52 are positioned close to the sheets, and,
a laterally enlarged flange or head E2 formed
in this> position, the bearers 45 are forced by
at the inner end of each sleeve 60. In the pre
their engagement with the sheets to a position
ferred arrangement, a sleeve 60 is positioned ad~
of'eccentricity relative to the shafts I5, but this 40 jacent each end of the shaft I5a, and a tubular
action is resisted by the frictional engagement
body member 63 is carried by the shaft between
between the flanges 4'I,of the bearers 45 and the f the spaced sleeves 60, and the member 63 is`
coacting friction rings ,48, and thus, by rotation
suitably secured to the shaft I5a so that it roi
of the rollers, the product is constantly and firm
tates therewith. `Inasrnuch as both ends of each
ly engaged by the coacting bearers.
45 roller 59 are similar, only one end has been illus
trated. spaced rings or collars 55 are supported
The use of the relatively thin flat spring rings
35- permits the employment of any number of
on a cylindrical surface 66 of the sleeve 60 for
rings without greatly increasing the space re
longitudinal sliding movement, but each collar
quired. By this arrangement, any desired pres
65 is held against rotation relative to the sleeve
sure may be exerted against the movable collar 50 50 by a pin 25 which is received within an aper
2s by simply rotar-,ing the adjusting nut 3|, which `
ture formed in the sleeve B0, and its enlarged
rectangular head 2'I is received within a keyway
rotation is permitted by the yieldability of the
securing plungers 36.
l
61 formed in the collar. A bearer 45e surrounds
the peripheral surface 66 of the sleeve 5U and is
The use of a plurality of flat spring rings per
mits-choice of the number of spring rings best 55 `positioned between the collars 55, with the inner
suited to produce the required pressure desired.
faces of the collars 65 frictionally engaging the
This is not possible when helical springs are em
outer faces of the bearer 45a. Each inner collar
65 is provided with an annular projection I6B
ployed, because similarly disposed helical springs
in axial alignment obviously would not produce
which engages a face 59 formed on the head 62.
the requisite pressure. The flat spring ring also 60 Each outer collar‘65 is provided with a similar
projection 68‘1` which is engaged by the inner por~
has characteristics which give a relatively con
stant percentage of change of load for a given
tion of a ñat spring ring 35, and the outer portion
of the spring ring 35 is engaged by the projec
increment of deflection at any point within the
Vtion 33au of an adjusting nut SI5, substantially
deflection limit, thus facilitating adjustment at
both heavy and light loads. In the use of coil 65 similar to the nut hereinbefore described.
YIn this arrangement, each adjusting nut 3| a
or helical springs, a given change in deflection
anywhere within the deflection limit gives a con~
may be rotated in the manner hereinbefore de
stant change in load and, consequently, the sensi
scribed, to adjustably move the nut longitudin
tivity of adjustment is lost at light loads. The
nally with relation to the sleeve 60 to thereby
load capacity of a fiat spring ring is relatively 70 exert the requisite force on the outer portion of
high, considering the small space required for its
the spring 35, and the spring 35, in turn, imparts
employment. In a spring of this type the load
pressure to each outer collar 65, so that each
is distributed more uniformly over the friction
bearer 45a is frictionally engaged by the collars
imparting members, because the load required to
65. The outer diameter of the bearers 45*i is
straighten out any initial irregularities in the 75 somewhat greater than the outer diameter of the
2,407,239
7
8
conforms _to the linear speed ofthe web. In pro
pelling different numbers of webs, the degree ‘of
torque imparted to the roller is varied to conform
b'ody member 63 and collars et, and the inner
diameter.` of the bearers 45a is sufficiently greater
than the diameter of the cylindrical portion of
to the required drag or torque pull, and the degree
the sleeve fit», so that 'the opposed yieldable fric
tionally-held bearers d5“ of a pair of nipping Cn of torque may be readily controlled by adjusting
the nut 3 ib to impart the desired force to the
rollers 59 will coact to engage webs W running
spring rings 35 to thus cause the springs to exert
between the coacting nipping rollers as 'hereini
the requisite pressure on the slidable collar 65".
before described, to thus propel the webs.
In the rarranfïements herein disclosed, duplicate
The degree of adjusting movement of the nut
¿ilF~ may be readily determined by inscribing a 10 rollers simultaneously engaging the opposite sides
of the web are shown, although under certain con
calibrated scale 551 on the nut 3E“ for registra
tion with an index mark 5"! inscribed on the
outer collar 65, in a manner hereinbeiore dis
ditions satisfactory operation can be obtained by
the use of a solid roller engaging one side of the
product, and a roller of one of the forms herein
closed.
In Figure 6 there is depicted a drag roller for 15 shown engaging the opposite side of the product
instead.
It will be understood that the invention may be
former, and this roller includes a shaft ibi’
embodied in other specific forms without depart
which has a roller body ßâb rigidly secured there~
use in a printing machine over a conventionalv
ing from the >spirit or essential attributes thereof,
tc, and the shaft is rotatably supported by anti
'friction bearings 'lû carried by side members 'il 20 and it is therefore desired that the present em
bodiment be considered in all respects as illus
of the machine frame, and the bearings are re»
trative and not restrictive.
tained in their operable position by bearing re~
What I claim is:
tainer members. 'l2 and spacing rings "e3 and lb.
l. In a material propelling roller for printing or
Similar bearings it are provided at each end of
the shaft i512 but inasmuch as these bearings are
alike only one end of the shaft is shown.
The terminal portion cf the shaft
at .its
drive end is reduced, as indicated at l5, to supF
pci-’t thereon a sleeve fit1’. The sleeve ë‘ilb is held
against axial movement on the reduced portion 30
secured
retaining
"i3 of the
to washer
shaft
the terminal
between
18. The
of athe
retaining
shoulder
shaft by
washer
'il a and
screw
i9, cr other suitable securing device, and the
sleeve E0" is held against rotatie-n relative to the
folding machines, a rotatable shaft, a rotary ma
terial engaging member supported by and rotat
able with the shaft, a sleeve rotatable with the
shaft and having a friction face, a driven member
rotatable about the sleeve and having a friction
surface, a friction collar supported relative to and
rotatable with the shaft and movable in the direc
tion of the axis of the shaft, an adjusting member
supported relative to the shaft and movable in the
direction of the axis of the shaft, and a flat spring
' ring normally disposed entirely in a plane per
shaft EE" by a key 8i. The sleeve Gâb is provided
with a flange 62h at its inner end, having -a
pendicular to the axis of the material engaging
member and surrounding the shaft and operably
interposed between the adjusting member and the
collar whereby axial movement of the adjusting
clutch face 8G which frictionally engages a clutch
surface 85 formed on the inner face of a gear
86, which is rotatably supported on the sleeve btb. 40 member causes the spring ring to bias the collar
A collar or ring 55h is mounted for longitudinal
for movement towards the said friction face to
movement on th sleeve Elib, but this collar is held
thereby press the driven member between the
against rotative movement relative to the sleeve
collar and the friction face and yieldingly drive
GGD by a hey 8l, or other suitable securing device.
the material engaging member when the driven
The inner face of the collar 65h engages the outer
member is rotated, the adjusting member engag
ing the spring to constantly bias the spring
face 88 of the gear 86, so that it is frictionally en
gaged on each side. The gear Bt is provided with
teeth ëê which mesh with similar teeth on a drive
gear
convenient
not shown,
drive which
component
may of
be the
driven
machine.
from
An annular projection 53h extends outwardly
from the collar 55", and engages the inner portion
of a flat spring ring 35. This spring ring is, in
this instance, disposed in face to face abutting
relation with a second similar spring ring, and the
outer portion of the second ring is engaged by an
against the collar and the degree of constant bias
of the spring against the collar being determined
by the degree of adjusting movement of the ad
Ci
justing member.
2. In a material propelling roller, a rotatable
shaft, a material engaging member carried by
and rotatable with the shaft, a sleeve secured to
and supported by the shaft and having a flat
wi clutch face, a driven member having opposite
clutch faces and rotatably supported by the
annular projection 33h which extends inwardly
sleeve, a collar rotatable with the sleeve and
from an adjusting nut 3Ib, substantially similar
to the adjusting nuts hereinbefore described.
In operation, the engagement of the clutch faces
85 and 88 of the gear 86 with the clutch face S0
slidable axially thereon, an adjusting 'member
and clutch face of the collar 551’ causes the gear
entirely in a plane perpendicular to the axis of
the material vengaging member and surrounding
the sleeve and operably interposed between the
adjusting member and the collar to bias the co1~
lar for axial movement towards the said flat
clutch facev to frictiorlally connect the driven
member with the sleeve to thereby yieldingly ro
tate the shaft and material engaging member,
the adjusting member engaging the spring to
constantly bias the spring against the collar and
the degree of constant bias of the spring against
the collar being determined by the degree of ad
justing movement of the adjusting member.
3. In a material propelling roller, a rotatable
75
86 to drive the shaft lâh and roller 53D until a pre*
determined resistance is exerted on the roller 53h,
and then the gear will slip to permit the roller to
conform to the speed of the web Wb which is
wrapped about the roller body 63", in conformity
with the usual practice in guiding and propelling
webs through a printing machine.
By this ar
rangement the roller body'fââb may exert suûicient
torque pull or “drag” on the web to propel or feed
itl but the torque imparted to the roller body 63h
will not be suñicient to cause the roller to slip or
move relative to the web, so that the peripheral
speed of the roller, as hereinbefore stated, always
threadedly secured to the sleeve and movable ax
ially along the sleeve when rotated relatively
thereto, and a flat spring ring normally disposed
9
2,407,239
shaft, a material engaging member carried by
and rotatable with the shaft, a sleeve supported
by and secured to the shaft and having a iiat
clutch face, a driven member having opposite
10
operably interposed between the' adjusting mem
ber and the collar to bias the collar for axial
movement towards the said driven member to
frictionally engage the clutch faces of the sleeve
‘and collar with the clutch faces of the driven
member to thereby yieldingly rotate the shaft
clutch faces and rotatably supported by the
sleeve, a collar rotatable with the sleeve and slid
able axially thereon, an adjusting member
and material engaging member, and means for
threadedly secured to the sleeve and movable axi
securing the adjusting member against uninten
ally along the sleeve when rotated relatively
tional rotation relative to the sleeve, the adjust
thereto, and a flat spring ring normally disposed 10 ing member engaging the‘spring to constantly
entirely in a plane perpendicular to the axis of
bias the spring against the collar and the degree
the material engaging member and surrounding
of constant bias of the spring against the collar
the sleeve and operably interposed between the
being determined by the degree of adjusting
adjusting member and the collar to bias the col
movement of the adjusting member.
lar for axial movement towards the said flat 15
5. In a web propelling roller for a printing ma
clutch face to frictionally connect the driven
chine, a rotary material engaging member adapt
member with the sleeve to thereby yieldingly ro
ed to propel the engaged web, a rotary driven
tate the shaft and material engaging member,
member, a rotary and slidable collar, a movable
and yieldable means for securing the adjusting
adjusting member, and a slidable ñat spring ring
member against unintentional rotation relative 20 normally disposed entirely in a plane perpendicu
to the sleeve, the adjusting member engaging the
lar to the axis of the web engaging member and
spring to constantly biasl the spring against the
operably interposed between the adjusting mem
collar and the degree of constant bias of the
ber and the collar and operably engaged by the
spring against the collar being determined by
adjusting member and collar respectively ad
the degree of adjusting movement of the adjust 25 jacent its outer and inner peripheral edges to
ing member.
bias the collar for movement to frictionally conn
4. In a material propelling roller, a rotatable
nect the driven member and web engaging mem
shaft, a material engaging member carriedlby
ber and yieldingly drive the web engaging mem
and rotatable with the shaft, a sleeve supported
ber, the adjusting member engaging the spring
by and secured to the shaft and having a clutch 30 to bias the spring against the collar and the de
face, a driven member rotatably supported by
gree of bias against the collar being determined
the sleeve and having opposite clutch faces, a
by the degree of adjusting movement of the ad
collar supported by and rotatable with the sleeve
justing member from normal flat condition of the
and slidable axially thereon, the collar having a
spring to a deflected condition Within the elastic
flat clutch face, an adjusting nut threadedly l limit of the spring, the spring having a relatively
secured to the sleeve and movable axially along
constant percentage of change of load for a given
the sleeve when rotated relatively thereto, a fiat
increment of deiiection at any point Within the
spring ring normally disposed entirely in a plane
range of deñection adjustment.
perpendicular to the axis of the material engag
ing member and surrounding the sleeve and 40
ALEXANDER J. ALBRECHT.
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