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Cet. 29, 1946.
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Patented Oct. 29, 1946
2,410,189 -
UNITED l’STATES PATENT ‘ OFFICE Louis A. Straubel and James ,W. yStraubel, Green
vBay, Wis.; said Louis A. VStraubel assigner to
said James W. Straubel, as trustee
’
"Application November 27, 1944, seriaiNo. sesgos
.1...
, s claims.
(c1. 154-30)
2
This invention relates to a creping machine for
lcreping dry vweb material, such as paper and the
like, to impart thereto a high degree of softness
and stretchability.
tion to provide a creping machine including crep
ing plates having blunt, or rounded, leading edges
It has heretofore been proposed to crepe web
material, such as paper, in a dry state by means
of a pair of doctor blades ground to conform
to the curvature of the creping rolls and'pro
including evening rolls driven at a much slower
rate of speed than the creping rolls for insuring
a uniform and even' distribution of the creped
paper from such accumulation Within or between
and providing a restricted passage for the ac
cumulation of the bunched creped paper, and
vided With-sharp leading edges held in» tight
the creping plates.
,
surface contact with the surfaces of the rolls. 10 ,Other and further important objects of Athis
For various reasons, such prior art devices have
invention will be apparent from the disclosures
proved unsatisfactory for the commercial pro
' in the specification and the accompanying draw
duction of` creped paper.
For one thing, the
ing.
"
sharp edges of the doctor blades tend to tear the
On the drawing:
'
paper web, especially when lightv paper is being 15 Figure 1 is a longitudinal sectional view of a
creped. Particles of dirt, grit or the like fre
creping machine embodying our invention.
quently become wedged between the sharp doctor
-blade edges and the surfaces of the rolls and `
either tear or weaken the paper as it passes
thereagainst.
v
.
'
'
In accordance with’the principles of our inven
Figure 2 is an end elevational view with the
creping rolls removed.
,
Figure 3 is an enlarged, fragmentary view il
20 lustrating the arrangement of creping rolls and
doctor plates.
v
tion creping platesr are providedvhaving relative'
The reference numeral I 0 indicates a supply
ly blunt, or rounded, leading edges.v Preferably,
roll of web material mounted upon a stand II
»the rounded 'leading edges are held in closely
and provided with the usual braking means (not
spaced relation to the surfaces ofthe Acreping 25 shown) for securing the proper tension on the
rolls, rather than in .tight vpressure relationship
web I2 as it is -unwound from roll. A pair of
-as heretofore. »The creping plates need not be
feeding and creping rolls I3 and I4 are mounted
ground to yconform with `the .curvature of the
ina pair of stands I5 with their axes in vertical
creping rolls, but should merely be sufficiently
alignment. Said rolls I3r and I4 are provided
relieved to permit the leading edges to extend 30 with hard smooth surfaces, preferably of chilled
linto closely Aspaced relationship with the bite of
steel, to prevent scoring of the rolls by the paper
Vthe rolls. Under these circumstances, a dry web
in the creping operation. The ends of the shaft
of paper can be satisfactorily creped to give a
I6 of the upper roll I3 are journalled in a bear
high degree of softness and stretchability, and
ing block I'I that is vertically adjustable between
eliminate the danger of tearing the web dur 35 the upright guides I8 of said stand I5. A bolt
ing the crepingoperation.
~
I9 threaded through the cross piece 20 at each
Itis therefore an important object of> our in- ' end vof the guide stands> I8 serves to adjust the
vention toY provide a creping machine for the
pressure between said feed rolls I3 and I4 at the
.creping of web material, such as paper and the
like,¿in ardry` state, the machine being provided
bite 39 therebetween.
Y'
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40
A pair ofïevening rolls 2i Vand 22 are mounted
with creping plates having blunt, or rounded,
vin a stand 23 behind the feeding and creping rolls
leading edges that extend intofthe' delivery’side
I3 and I4 and with the bite between said evening
of.v the-„bite-of thek creping rolls-_but- are prefer-'
rolls »in horizontal alignment' with the bite be
,ably >slightly spaced from the roll surfaces or
tween the feeding and creping rolls I3 and I4.
atleast not in pressure contact therewith. f
45 Said evening rolls 2| and 22 are so arranged that
It is aofurtherimportant object of this inven
they are not in contact with each other but their
tion to provide a creping machine for the creping
surfaces are spaced slightly apart to provide for
offdry web material, such as paper, using creping
the passage therebetween of the creped paper,
plates having blunt, or rounded, leading edges
- indicated by the reference numeral. I2a. "The
spacedslightly apart to provide a restricted pas 50 surfaces of said rolls 2| and 22 may suitably be
sage between >the creping plates, the blunt lead
knurled, as indicated at K, although they may
ing :edges in cooperation with the surfaces of the
also be smooth.
'
creping rolls adjacentk the bite - therebetween
Between the sets of feeding and creping rolls
serving to. upset the web substantially' at the bite
and evening rolls there is mounted a pair of rigid
itself and'to cause the `upset paper to accumulate 55 creping plates 24 and 25. Said plates extend the
Ain'bunched4 condition between saidcreping plates.
full width of the rolls and are supported so as to
v I It isa further important objectv of this inven- _
be adjustable relative to each other to- provide a
2,410,189
3
4
driven through intermeshing pinions 62 and 6I
.'gap 26 therebetween. For this purpose, the crep
ing plates 24 and 25 may be suitably carried by
sets of straps 21, 21 and 28, 28 from the roll sup
porting stand 23, the straps being slotted and pro
vided with bolts 29 and 3.0 for securing-saidstraps
to said supporting stand 23. Adjustment of the
secured to the shaft 56 and the upper shaft 43,
respectively, so that the draw rolls will be driven
at the same surface speed. The surface speed>
of the «draw rolls 40 and~4~I is preferably slightly
-less than that of the feed Arolls I3 ‘and I4.
The operation of the machine of our invention
width of the gap 26 between said creping plates
24 and 25 may be performed by loosening the bolts ’ .is as follows:
In starting up the machine, the leading end of
29 and 30 and moving the plates toward or away
,10. the »web I2 is fed into the bite 39 between the
from each other.
feeding ìandcrepingfrolls I3 and lli. The Web
The creping plates 24 and 25.-, as `best shown. Yin
tends‘to pass 1in «a straight line between said rolls
Figure 3, comprise a pair of rigid Aplates .having
and not`> to :adhereto either of them. As the web
plane opposed surfaces '5I and 32, respectively,
passes into the restricted passage 25 between the
which are equally spaced from a plane tangent
creping'plates‘the friction of the web upon the
to said bite 39 between the 'feeding‘and‘cr'eping
plane 'surfaces 3i and 32, as well as the slower
rolls I3 and I4. Said' surfaces 3l and 32 together
moving surfaces of the evening rolls 2I and 22,
form the restricted passage 2S. The leading edges
`causesrthe paper to backup and fold upon itself
33 and 34 of said creping -plates 24V and 25 are
until van accumulation -of -buncheÍd-up.-.paper„ as
rounded upon a radius ‘that >may vary Vbetween
-?g'and 1A of aninch. Rearwardly of said'lea‘ding
edges JP3» and ‘34, the creping plates are relieved,
as at 35 'and '35, respectively, toprov'ide clearance
between the .plates and the surfaces ofthe rolls
20
indicatedat'ii'ä., is produced. The pressureplaced
upon the web ahead of the leading edgesÍ33 »and
34 causes the paper to be upseton the `delivery
`side of the rolls-Ißand I4Y.substantially back into
the bite 39.
_
ì ,
v
I3 .and 14. The c’reping plates are similarly re
As the pressure-of the paper in back ,ofitforces
lieved at their rear edges, as at -'31. and 53 4for 25
thebunched-up accumulation G35-out .of the `pas'
clearance with the surfaces of the evening rolls
sage 2G, the crepedpaper ¿Zafis caused .-.tofpass
2| and 22. I-t will kbe noted that sa'id- leading edges
Abetween the evening rolls 2i and 22„ which îserve
33 Vand 34 extend into close proximity with the
bite, `indicated at'39, between said Arolls 'Iäand 'I4
.t0-deliver the -creped `;pap_er„evenly -and uniformly.
and into closely spaced relationship with the sur 30 The_creped web-'I-Za is then passed through the
bite of the rolls 402and 4I „f-rom'which the creped
faces of said rolls, but preferably not in vactual
web passes throughjtheV rewindento :be wound up
contact therewith.
yinto a roll 41. Thepressure betweenvthedraw
A pair- o'f .draw rolls 4B and 4I `are mounted
rolls 40 and 4I »is_controlledsothatfthe resilient
behind the eveningrollsin vertical pressure vlrela
surfaces :of these rolls 'will no_tîtake out too :much
tionship to each other upon la .stand «42. The
upper roll 4.0, like the roll >I3,„hasashaftÍ`4Iâl that
By virtue of the construction aboveifdescribed,
is journalled at .its ends in bearing blocks lidi-,hat
the-.machine of our ‘invention iscapable of Apro
are vertically adjustable between `.the ~upright
ducing `commercially.a heavily :creped 'webofipa
guides of said `stand 42, as b-y means of -a> pair of
bolts `45. r-l‘he rolls 4i! and 44 yare preferably` pro 40 pen. starting> with'the web indry fcondition. As
Aof the
crepe.
i
,
_
,
.
illustrative> of ¿some rof lthe'moreimportant „di
vided with asoft or yielding surface, suchas rub
ber or felt, so as «not to calenderout thecrepe
that is put into the >web 42a. The :speed of the
draw rolls 4G and 4I can-be regulated to-leave‘any
bmensions, the. leadingïedges ¿33 .and ì34 mayfbe
vset within .3A -and .lïßilinch'es :from y.the bite. 39.
.One rof the .leading edges may. be slight-lyJ .inlad
percentage `of crepe :desired in the Ípaper,.»cr if .the - = .vance of theother, `orfithe two :edges amaytL-b‘e .in
rolls 4D and M the web I2asis rewound`> .into a
"vert-ical alignment. ¿The »restricted v.passage "2B
‘may suitablylbe around lßpfof :anginch in fwidth,
depending upon `therbasic 'weightgof ¿the >.paper
.being creped. vThe .knurledevening .rollsJZßI and
12 2; maybespaced apart .bylas .much as 1/8 .and Í%
roll 41.
>ofan'in'ch.
surface speed -of therollsßß Vand Y41| is the same
as that of rolls I3 and I4, vthey willtend to -pull
out-most of ‘the-crepe but will nevertheless leave
the paper considerably softer. From the Ídraw
,
`
It will, of V-course,'be‘understood vthat various
details of construction may-be var-ied through -a
widerangew-ithout y¿departing from the «principles
of: this invention Landit is, v»1-,hereforev, not'the
.purpose to :limit theipatent 'granted iher-eon other#
The lower feed roll `I4-„znay.suitablybedriîren
by means of a-beltß?îl -passin'gyarollhd agpulley 49
that is keyed tothe roll shaftiäû. »The upper feed
roll vI3 is driven throughapairofmeshing pinion
gears 5I and 52 secured to said/,shafts@Tand-145,
wise. than fnecessitated L byith'e vscope fof@ thet fap
respectively. This insures the rolls i3 and I4
being driven at the same rate of surface speed.
The evening rolls 2i Aand 22 may be geared
In .la . crepin'g f machine v -forl-paper»-and- other
together by pinions 53 andY 51,3but areindepend 60
'web ïniateriaka @pair-»of smooth` surfaced rolls
lrently driven by any suitable means `(not shown)
forming aßbiïteïthereb'etween Sinto which said web
at a `greatly reduced surface speed with respect
.pended'claims
Whatiwefelaim is:
'
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i
.Y
y
Y
Í
~>
ito said feed rolls, as for instance in the ratio of
-is drawn, ¿a painofirigidly‘mount’ed«crepingßplates
’l to'35. These rolls regulate therate of discharge
.prOVídi-ng: `a .restricted Lpassage therebetween ¿and
4extending into. the :deliveryzsi’de :of :said .bite-,fl said
Vplates having `blunt „leadingnedges:closely ad?
jacent: to> .but fniot :in :pressurezscraping v.relation
.sary because the creped paper is Vin bundles as it
yShip' wii'fhî'jsaid> roll'rsurfaces, v.sa-id :blunt :edges in
:passes throughrthe evening rol-ls. These rollsthus
cooperation' with: âtnemalilsiof '.‘saiid :restrictedßpas
:also serve to put back pressure on thepaper to
`cause it to be upset back in the bite of the rolls 70 sage ¿having thev effect ofbackingasaid web vup
upon .'-ritself vinvsaidçbite `alfiead .of-‘said leading
>»I3 and I4.
.edges to ,be there cre-ped, .and means rfor. ¿drawing
The shaft V59 also carriesa sprocket gear 53
-cf the bundles of creped paper from the accumu
65
lation 55. The reduced speed of the rolls» is neces
said, ¿creped , web ethrough § and ¿out -i of . Vsai‘dmre
.stricted ßpassage at »,a - rate v`of tspeed; ysuch` las'. to
The upper draw roll '4D is 75 cause said web to retain much of its crepe. '
yaround which is trained a chain-54 for ¿driving
a sprocketgear ~55 secured tothe .shaft 56 »of the
îlower draw roll 4I.
2,410,189
5
2. In a creping machine for paper and other
web material, a pair of smooth surfaced rolls
forming a bite therebetween into which said web
is drawn, a pair of rigidly mounted creping
plates providing a restricted passage therebe
tween and extending into the delivery side of
said bite, said plates having blunt leading edges
closely adjacent to but not in pressure scraping
relationship with said roll surfaces, said blunt
edges in cooperation with the walls of said re
stricted passage having the effect of backing said
web up upon itself in said bite ahead of said lead
ing edges to be there crepedy means for drawing
said creped web through and out of said re
stricted passage at a rate of speed such as to
cause said web to retain much of its crepe and a
pair of spaced evening rolls for insuring a uni
form and even feed of creped paper from said
creping plates to said drawing means.
3. In a creping machine for paper and other
web material, a pair of smooth surfaced rolls
forming a bite therebetween into which said web
is drawn, a pair vof rigidly mounted creping
plates providing a restricted passage therebe
tween and extending into the delivery side lof
said bite, said plates having rounded leading
edges closely adjacent to but not ín‘ pressure
scraping relationship with said roll surfaces, said
6
bunching up in said restricted passage to form
an accumulation therein, means including knurled
rolls for controllably releasing said creped web
from such accumulation and a pair of resilient
rolls for drawing said creped web from said
accumulation and through said knurled rolls at a
uniform> rate of speed.
-
6. In a creping machine for the dry creping of
paper and other web material, a pair of feeding
and creping rolls having smooth hard surfaces
providing a pressure bite therebetween for receiv- '
ing the web material, a pair of rigid creping plates
.having opposed plane surfaces equally spaced
from a plane tangent to said roll surfaces at said
bite, said plates having rounded leading edges
positioned adjacent to said bite on the delivery
side thereof, means for adjustably supporting
said plates in fixed adjusted position to provide a
restricted gap between said opposed surfaces, said
rounded leading edges in combination with said
opposed plane surfaces having the effect of back
ing up said web upon itself in said bite ahead
of said leading edges to be there upset and creped,
the creped web bunching up in said restricted
passage to form an accumulation therein.
7. In a creping machine for the dry creping of
paper and other web material, a pair of feeding
and creping rolls having smooth hard surfaces
rounded edges in cooperation with the walls of
providing a pressure bite therebetween for re-said restricted passage having the effect of back 30 ceiving the web material, a pair of rigid creping
ing said web up upon itself in said bite ahead of
plates having opposed plane surfaces equally
said leading edges to be there creped, the creped
spaced from a plane tangent to said roll surfaces
web bunching up in said restricted passage to
at said bite, said plates having rounded leading
form an accumulation therein, a pair of knurled
edges positioned adjacent to said bite on the de
rolls having slightly spaced surfaces for receiving
the web therebetween from said accumulation
and feeding the web uniformly and evenly and
means for drawing said creped web through and
out of said restricted passage and between said
knurled rolls at a rate of speed such as to @aus
said web to retain much of its crepe.
'
4. In a creping machine for the dry creping
of paper and other web material, a pair of feed
ing and creping rolls having smooth hard sur
faces providing a bite therebetween for receiving
the web material, a pair of rigidly mounted crep
ing plates having plane opposed surfaces provid
ing a restricted passage therebetween, said plates
having rounded leading edges positioned adja
livery side thereof, means for adjustably sup
porting said plates in fixed adjusted position to
provide a restricted gap between said opposed
surfaces, said rounded leading edges in combina
tion with said opposed plane surfaces having the
40 effect of backing up said web upon itself in said
bite ahead of said leading edges to be there upset
and creped, the creped web bunching up in said
restricted passage to form an accumulation
therein, and a pair of spaced rough surfaced
rolls driven at a much slower rate of speed than
said feeding and creping rolls to aid in the uni
form delivery of the creped web> material from
said accumulation.
8. In a creping machine for the dry creping of
cent to said bite on the delivery side thereof and 50
paper and other web material, a pair of feeding
in closely adjacent relationship but not in pres
and creping rolls having smooth hard surfaces
sure scraping relationship to said rolls, said
providing a pressure bite therebetween for re
rounded edges in combination with said opposed
ceiving lthe web material, a pair of rigid creping
surfaces having the effect of backing said web
plates
having opposed plane surfaces equally
up upon itself in said bite ahead of said leading 55
spaced from a plane tangent to said roll surfaces
edges to be there upset and creped, the creped
at said bite, said plates having rounded leading
web bunching up in said restricted passage to
edges positioned adjacent to said bite on the de
form an accumulation therein and a pair of
livery
side thereof, means for adjustably sup
spaced knurled rolls for controllably releasing
' porting said plates in fixed adjusted position to
said creped web from such accumulation.
5. In a creping machine for the dry creping of
paper and other web material, a pair of feeding
and creping rolls having smooth hard surfaces
providing a bite therebetween for receiving the
provide a restricted gap between said opposed
surfaces, said rounded leading edges in combina
tion with said opposed plane surfaces having the
effect of backing up said web upon itself in said
bite ahead of said leading edges to be there upset
web material, a pair of rigidly mounted creping
and creped, the creped web bunching up in said
plates having plane opposed surfaces providing a
restricted passage to form an accumulation there
restricted passage therebetween, said plates hav
in, a pair of spaced rough surfaced rolls driven
ing rounded leading edges positioned adjacent Ito
at a much slower rate of speed than said feeding
said bite on the delivery side thereof and in
closely adjacent relations-hip but not in pressure 70 and creping rolls to aid in the uniform delivery
of the creped web material from said accumula
scraping relationship to said rolls, said rounded
tion and a pair of resilient surface rolls for draw
edges in combination with said opposed surfaces
ing; said creped web through said rough surfaced
having the effect of backing said web up upon
rol s.
itself in said bite ahead of said leading edges to
.
LOUIS A. STRAUBEL.
be there upset and creped, the .creped web 75
JAMES W. STRAUBEL.
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