Note: Descriptions are shown in the official language in which they were submitted.
20811~3
T~ inv-ntion r-lat-~ to a coat~ng d~vic~
havlng a doator l-m nt, ~nd a c~a~ber, upport b ~m
and f--a ¢hann-l oach havlng a l-ngth abou~ t~
~- th- dootor ~ nt ~uch ~ coating d-vic- 1-
known ~ro~ DE 37 2S 5~S Al Accor~lng to th$~ prlor
arr~ng-~ nt, ~ rocolvlng ch~bar for th- co~ting
uixtur- 1~ locat-d ln t~- $mmodiat- v$c~nlty o~ th-
ur~ac- ~lng co~t-d ~roll or web c~rrlod by it), ~o
th~t tho coatlng mixtur~ n~-d~ to n~goti~to only a
v-ry chort ~l-t~nc- rrom th~ ch~b~r to th- ur~ac~
~n~ ¢o~t-d 8uch B ~ign~ h~v- th~ advantag- that
th y may b ~a-hlon-d rolativ ly ao~pact AnoehQr
i~ilar d~vlc- ~- known fro~ D~ Q~ C gl 06 311. Th~
~5 ltuation g-n rally 1~ that tho co~ting ~ixture in
the roe-~vlng ehamb r i- pr--~urlz-d ~nd ~ od
through ~ ehann l Or r~l~tlv~ly narrow ~idth to t~
~urrao to b oo t-~. Th-r-~or-, ~udh arr~ng~ment~
are ~l-o oall-~ noz~l- appllaator-
ao . Th~ problQm und-rlying the lnv~ntion i~,
d~-~ite th- r-latlv ly hort di~tance bet~n
r~4-iv~ng ohamb~r and ~urfae- to be coat d, to r~d
a v ry unl~orm flo~ of eoating mlxtur- - vl-wod
a¢ro~ the widt~ o~ th- w~b or, gener~lly, Or th
~r~ae- to bo ¢o~t-d ~ehi-vod th-r-by - on
eondition that ~11 oth~r r~qulr-~ont~ o~ a co~tlng
aevlc- o~ high utility ar- n-t - 1~ that good
pr~r~qulelt~- ~re given for a v~ry uni~orm eoat~ng
applioatlon on tho ilnl~hed produet, ~uch ~ pap~r
or o~rdbo~rd w~b. Th- ~ltu~tlon g-nerally 1~ uoh
th~t th us~ac-- b lnq coat-d, ~u~ to th-lr vory
h~gh trav-l ~p ~d~ which ar~ cu-tomary tod~y,
h avlly ~e-d th- co~ting mixtur~ to the doctor
elo~nt, o th~t irregular~tl~s alr~ady exi~tlng ln
th co~ttng mix~uro rlow ~ill contlnue up to th-
~
dootor l~m-nt, de-plt- ~n~ othor ~ ur-- wh~ch
nlg~t yet be t~kon
Th- pr---nt ln~ ntlon provldoc a ~oil-r wlthin
S th- ~--d chann-l ~llgned par~llel to th-
longltudlnal dir-ction of on- of the docto~ nt,
or a num~-r of butting poil-r bar- hav~ng rib~ and
~lot~ ~lt-rnatin~ ln tho ~lrection of th-
longitudlnal xt-n-$on, or pro~-ation~ whl¢h ~n th~-
longltud~nal dir atlon corr--pond to th- r~b~, or a
b~r wlth ~ cont~nuou- row o~ holo- Th- ~oller b~rs
or ~ro~-¢t~on- r~du~- th- ahann-l croa~ -ctlon
b ~or- or art-r th- bar or pro~-¢tion~ ~y at l-~t
30% of th- chann l cro~ ¢tlon
Partlcularly ~avor~bl- 1- ~ row o~ or -ation~
o~ ~poil-r ~ar- ~ho~e lot- ~nd rlb~ differ from one
anoth-r ~nd ar- ad~pt-d to local condltiono ~or a
~lo~ which 1- unl~or~ ~cro-~ th~ width o~ the ~o~
ah~nnol
on th- pro~ection or rib~ o~ th~ ~po$1er bar,
a turbulenc- ¢~n b g-n~r~ted whlch ln ~d~ition to
t~ add~tlon~l ~lo~ r-~l-tanc- cau-oa ~y th- ~poil~r
bar or th~ pro~-¢tion ff-ct~ ~ ~urt~r moothlng
of th coating mixture ~low
~S ~
~h lnv ~tion wlll b~ xplain d hor-a~t-r with
th ~id o~ tho nbodi~ nt~ illu~tr~ted in th~
rigur-~ 0~ th- dr~wlng
Fig 1 1- ~ cro~- octlonal viow
~ rp-ndlcularly to th- trav-l dlr-ction or th~
urfac- b4ing co~tod - Or ~h- coatlng d ~ Or th-
~r---nt ln~ ntlon;
Fig-. 2-~ ar- l~ngitua~nAl ~ation l v~-w~ o~
th- poil-r b~r(~) and their lot~ an~ rib- - th~t
i~, p-rp-ndicularly to th- dr~wing pl~no - Or
.. . .. .
3 2081143
varlou- ~bod~mont~ o~ ~poll-r b~r-, or ~lot- ~nd
r$b-; and
Fig 5 1~ a ~lan vl-w of anoth~r mbodimont of
a poil-r bar
S DET~IIED DE8~RIF~IQ~ OF THE INVEN~ION
R~rone-d l in Fig 1 ~ a ~u~ort b am
-rvlng to ~upport the ~ ntial part~ of th~
coatin~ d-v$c- Th~ ~p~cial ~eature provid-d h-re 1~
that by m an- of pr-~-ur~ ho~ 14 b-~rinq on a
a-ntral upport plp- 12 an out-r upport ~l~ove 13
i- uovably mount-d through wh~ch th ~upport b~am 1
1~ ad~u~tably upport-d acro-~ it~ l~ngth in or~er
to ~qu~ - any rl-xur-- of lt or to aa~u~t
~p~cl~lc b-ndlng lin- of it Mount~d on th~ ~upport
b~a~ - on th~ ~ partur- ~ldo r-l~tlv to th- urfaco
to b- ooatod - lo a doctor le~ nt 5 Th~ ur~aa- to
b coat-d ~ovo- ~n th~ dir-ctlon o~ arrow 50 ~nd may
tho urfac~ of a roll C or o~ a w~b W aarriod by
it, ~p olfically o~ p~p~r or card~oard Bola ln
ZO placc on tho upport b am 1, by rib~ 33, i~ anoth-r
b ~n tructuro 2, whioh pri~arily ~upporte tho
~ollowing ol-m~nt-. Fir~tly, a tubula~ r-c~ ng
ch~b~r 26 wlth dl wharg~ op~n~ng~ 27, ~or tho
co~ting ~ixtur-, which ~r- diotribut~d acro~c th
ch~mb~r length an~ d to a f~d ~hannQl 18. Aloo
~ro~ld~d 1~ a g~ld- el~mont 16 whl~h ~e~lne~, ~or
on-, th chann~l 18 on on- ~ld~ ~nd, ~or anothor, ~
cb~nn l ~3 on th- usfac- to b~ ooat d On the ot~r
id~ it d ~ln-~ draln dhann-l 8 ~or ~urplu~
coatlng mlxtur- tr~pped by th doctor ~ n~ 5
~ro~ th~ ~ur~aa- b-lng co~t-d Thl- channol xt-nd-
vl~ oon~triat~on- lo to ~ ooll-ctlng trough 2~ ~or
th- aoat~ng mlxturo arr~ng~d ln the r~gion or th-
gulde l~m-nt 16, along ~h- chann~l, that 16 ~n th~
longltudinal diroctlon o~ al~o the doctor ~l-ment 5,
1- a po~l~r b~r 6 whos~ rib~ (Sor in~tan~- 9 ln
. ~.. . .
.
'' ' ' ' ' '` :~
.
Fig 4) protrudo lnto th- chann~ Th~ po~l-r
bar al~o oon~trlct~ th- froo flow cro~ ction of
t~l- c~Annol Tho r-c-ivlng cha~bor 26 u~port- a
back-up b~r 4 ~hich on tho inl-t id - r~latlv to
tho ~urfa¢o to bo ooat-d - defina- on that ur~-c-
th~ ¢hann-l 18 8urp1u- coating mixtur- $~ pourlng
~ort~ al~o th-ro, although to a llmit-a ~xt nt, and
flow b~n-ath th guido ~lat~ ~oward th coll-ct$ng
trough ~9 a- ind~oatod by th~ arrow-
Tho chann l 23 ~or~d by tho gui~ nt 16
on th ~urfa¢- to ~ coat~d ~ay b f~hlon-d
r-lativ ly narro~, ln ord~r ~o ~chi-~ a furth r
ooothlng o~ the oo~t~ng mixtur- ~low
Vi-ibl- on th- ~pollor ~ar 6, ln Fi~. 2, aro
lS pro~-ctlon- wlth lot~ 15 in b~two n, tho-- latt-r
t~o b~lng r-ctangul~r ~r-! In Fl~ 3, tho ~lot~ 7
b tw -n th ~b- 9 oS ~ poilor bar 17' ~r- round~
at thoir botto~ Oth-rwl-~, though, th~ lot~, or
rib-, ~ay b r-l~tl~ly harp--dg~d ln or~r to
~0 ~-n rat- a turbul-n~- in tho ~low
8k-tch-~ h-r< 1~ a ~y ~vorabl~ ~bodl~ nt
W~th A numb-r o~ k~tt~n~ ~poLl~r bar~ 17~, 17 " ~n~
~7 " ', ~hloh ~rom b~r to bar ~a~ ~lot~ 7, 7' 7 " or
r~b~ ~, 9~, 9 ~ of diSf-r-nt do~ign and can be
ub-titut d by ~ r b~r~ with agaln oth~r ~lot-
or ~lot hap - tc., ~or purpo~-~ Or at~uat~ng t~e
b -t ~lo~ conaltlon-, o that ~lo~ cro-o ~c~lon~
~o~ th- oo~t~ng ~lxt~r~, adapt~d aaro~ the length
Or th- gu~ el-m nt ~6 (or it~ rQt~lning ~lot for
th- ~oll-r bar~) c~n b~ ~orme~.
Th poil~r bar 17 aecording to Flg, 4 ~e~tur~-
bo~o~ 3, r-~p ctlv-ly 3~, di-trlbut~d acro-- lt~
l-n~th. 5h~ d~mot-r o~ the bor-~ 3~ le ~Aller thsn
th~t o~ th bor~- 3, whioh ~Jk-e it po-~lbl- to
g-n rat- cro~- th~ length o~ th ~po~l-r bar a
~riatlon of th~ pr-~ure drop in the t~rbul~nc-, in
-- 1 . .
1 - ~ ,
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5 2081143
or~-r to th-r~by po~lbly impro~ thQ moothn-e~ o~
tho ~low ~he ~am 1~ vident ~rom Fig 3, where th-
lot- 7~, or 7", ~r- ~rrang-d in a ~horter -~uen¢-
or ar- lo-- d -p th~n th- lot~ 7, o that al~o
dlrr r-ntly h~p-d r~b- ~', or 9", r~-ult b~t~r--n
tho ~lot- Illu~trat-~ ln F~ 5 i~ llg~ n ~noth-r
~tyl- Or poll-r bar 6~ ~ with triangular lot~ 19
Provi~ion- ar- pro~rably ~d~ ~or llpplng th~
poll-r bar (~ way~ into th- ~uld~ ol~ent 16
~nd retalning th~m th~r~ by m ~n- of a ~oint 31 or
~llar guld way ~ lllu~trat-d ln Fig 1
~h- r~ul~r wi~th o~ th f- d chann l 18 ~
~rk-a e ln F~g 2-4 Tho followlng cond~t~on-
~l~ould pr-forably b- maintain d for tho poilo~ b~r,
it~ rlb- ~nd ~lot-~ Ba~lcAlly, the cro~ ectlon~l
con~trlctlon ao comparod to the nor~ l rlow croe~
ect~on o~ ~bout 10-20 mm wldth hould ~moun~ to
about 35 to 70~. Th- h-ight Or th rib~ 9, 9', 9~ '
t~. hould pre~-ra~ly rang~ b-tw~n 30 ~nd 45~, and
~he maYimu~ width Or tho ~lotc 7, 7', 7 " and lS
be~w -n ~5 and 4S~ o~ the wldth ~ or tho ch~nn~l 18
~thu ~or ln tano~ botw~-n 3 and 7 ~m). In Ca~R th~
lot- d~viat- heavily ~rom a r~atangular dhapo,
~e-- di~r-nce- r-l~t~ to th- sv rag- wld~h o~ the
as lot-. T~ ratlo of lot wldth to th wldth o~ th-
rib4 on tho1~ ~r-~ ~nd ~hould ~r- ~ra~ly ~mount to
b~two-n 0.8S ~nd 1.4~. Th~ thickno~ o~ th~ ri~- in
th- rlow dir-ction c~n be ~lm n~ion~d at h twe~n 8
and lS mo~ an~ th- minimu~ thlckn~e~ chould ~xl-t
al-o on th-lr oxpo--d ond. A~ ~aid, th~ r-c~c~o~
t-lot-) ~nd rib- o~ th~ ~poil-r bar~ ~ro r~l~tiv-ly
~ngular, ~t ~ny rat~ not h~vlly round d, in ord
to g-n~r~t- th~ turbul~nc~. Tho poil-r bar ~7
~ccor~ing ~o Fig. 3 ~l-o i- au~po--d to con-tr~ct
th~ fr-- flow cro-~ oction of th~ ch~nn-l 18 to
b~tw~-n 35 and 70~. Th- cro-s ~ctlon o~ th
, ~ ,
6 208~
op nlng- 3 and 3' ~hould ~mount to b-tw- n 1~ ~nd 40
.
Naturally, lt nood no~ bo ~pecl~lly po~nt-d out
that tho ~lot hap-- al~o may vary gr-~tly ~rom
tho-- lllu-trat-d, that th-y ~ay ~or ln-t~nc- ~l-o
hav a r-latlvely compl-x ~hap~. Thi- ~ould not
~--ntlally l-ad ~w~y ~rom th- b~-lo ~a of t~-
lnv ntl on.
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