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Патент USA US3060492

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Oct. 30, 1962
Filed NOV. 8, 1960
zum “52:2|
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United States Patent
‘M’ e
Patented Oct. 30, 1962
The end supports thus alforded preferably are so ar
ranged that one or both may be released for axial move-`
Donald J. Doyle, 1297 W. 114th St., Cleveland 2, Ohio
Filed Nov. 8, 1960, Ser. No. 67,968
6 Claims. (Cl. 15-306)
The present invention is concerned generally with vacu
um cleaner apparatus for cleaning moving sheets and
webs of paper or other ‘like materials; and more par
ment whereby the spring may be expanded and contract
ed to 'loosen material become adherent thereon during
the course of operation; whereby the effective nozzle open
ings may be cleaned without need of removal of the effec
tive face plate element from the vacuum cleaner head,
also thereby permitting the vacuum head to be left in its
actual place of service.
A general object of the present invention is to provide
In vacuum cleaning apparatus for moving sheets or
an improved type of vacuum cleaner nozzle for moving
sheet or web material. Another object is to provide fd
face plate construction for a vacuum nozzle of the type
webs of materials such as paper or the like, a common
construction includes a cleaning head having an elon- v
is to provide a nozzle for a cleaner of the type described
ticularly with improvements in face plate construction for
the cleaning nozzles of such apparatus.
gated narrow nozzle disposed transversely of and in prox
described of comparatively flow cost.
Another object
wherein the eifective nozzle apertures provided by the face
plate are to some degree adjustable in size. A further
object is the provision of a face plate construction in a
vacuum cleaner nozzle of the type described wherein the
contact with the moving material and serve both to 20 effective face plate nozzle openings can be readily cleaned
for ordinary operational servicing while the face plate is
loosen debris or other substances to be removed from
left in position in a vacuum cleaner head. Other objects f
the moving material and also -to localize and concentrate
and advantages will appear from the following descrip
the cleaning action of air moving into the nozzle in con
tion and the drawings wherein:
sequence of the vacuum applied thereto. In addition, be
FIG. 1 is a vertical longitudinal section through the
tween the brushes there is usually provided a nozzle
pertinent part of a vacuum cleaner nozzle embodying the
face plate, an elongated element having a series of longi
present invention;
tudinally spaced apertures for entrance of air into the
FIG. 2 is a vertical section taken as indicated by the
interior nozzle space, which keeps the moving material
line 2-.2 in FIG. l;
from being drawn up between the brushes into the
FIG. 3 is a yfragmentary section taken as indicated by
the line 3--3 in FIG. 1; and
Such prior face plates have generally been rather eX
FIG. 4 is a fragmentary bottom view at one end of the
pensive to manufacture because of the machining in
nozzle structure taken as indicated by the line 4-'4 in
volved in providing the spaced series of apertures there
FIG. l.
through and also in providing a suitable ñnish on the
In the drawings a preferred embodiment of the inven
sur-face thereof disposed toward the moving web. In the
tion is shown as applied to the nozzle base 10, represented
use of such prior face plates further disadvantages are
in fragmentary form, of a known type of vacuum cleaner
attendant, such as difficulty in cleaning and maintaining
head providing an elongated narrow nozzle inlet passage
the same after a period of service when the apertures
may have in some degree become clogged or narrowed by 40 disposed transversely of the path of a moving web or
sheet W (see FIG. 2) of paper or the like, which nozzle
accumulation of adhering dust or other debris from the
passage is in communication with a vacuum manifold
material which is cleaned. Usually in such cases the
(not shown) of the cleaner head. At eachv end of the
face plate has to be removed from the head,pwhich fur
nozzle base 10, a- roughly L-shaped block 12 having its
ther involves displacing the entire vacuum head from
normal position in the sheet or web handling apparatus 45 inner end face vertically slotted to receive a portion of the
corresponding end of the nozzle base, is secured by bolts
to provide access for removal of the face plate. Further
13 passed through the slotted region of the block, the
after cleaning and servicing of the plate, there is the re
opposite longitudinal walls 10a of the nozzle base and an
quire reassembly of the face plate to the vacuum cleaner
interposed spacer block 14.
head, with return and adjustment of the head as a whole
to proper position relative to the path-of the web or 50 »Extending lengthwise between the end block 12, on
each side of the nozzle base, there is a ?i'ller plate 15 and
sheet in the apparatus.
underlying plate 16 secured in similar fashion by bolts
By the present invention as aV face plate there is pro
extending through the nozzle structure and similar spacer
vided an elongated wound spring longitudinally supported
blocks provided therein to prevent collapsing or distortion
on opposite sides thereof by cooperating seat formations
at the mouth of the nozzle slot or opening. The spring 55 of the opposite nozzle base walls 10a, since the latter
are usually fabricated of sheet metal or lightguage plate.
may be a normal cylindrical helical spring or a flattened
The end blocks 12, spacers 14, and plates 15,v 16 are
form of the same, either normally wound, or extended,
intended to be a more or less permanent assembly of the
to present openings between adjacent turns. The pre
nozzle structure. The longitudinal bristle brushes B are
ferred form, a cylindrical helical spring is supported by
similar arcuate curved seat formations partially embrac 60 removably and usually adjustably secured in parallel
disposition to the above-described nozzle structure, with
ing diametrically opposed portions of the spring along
the bristles extending therebelow yfor contact with the web
its length, the spring projecting slightly beyond the seat
W, by bolts threaded into respective plates 15, 16.
toward the moving web to present the actual paper-con
It will be noted from FIG. 2 that the lower portions
tacting surface and the spaces between the adjacent turns
imity to the path of the moving material; and usually
a pair of elongated brushes disposed parallel to and on
either side of the nozzle opening. The brushes are in
thereof providing the actual effective inlet apertures of 65 16a of plates 16, extending -below the plates 15 and de
fining the effective slot-type inlet opening, have opposed
the nozzle face plate.
concavely arcuate faces 16b providing parallel longitudi
Further in the particularly disclosed cylindrical helical
nal seats receiving or embracing diametrica'lly opposite
spring form, rotatable elements threaded into opposite
longitudinal sides of the helical spring 17 projecting slight
end portions of the spring as end anchors are externally
accessible for rotation by a wrench or other tool for some 70 ly beyond the end portions 16a, thereby forming a face
plate for the nozzle structure 10.
degree of adjustment of the spring length and hence of
In each block 12, a spring end anchoring member 21
the nozzle face plate openings between the adjacent turns.
is mounted in a bore 20 and held in axially ñxed posi
tion by a dog point set screw 22 engaged in the circum
ferential groove 21a of the anchor member, the bore 20
being and therefore the member 21 being in alignment
with the common axis of the seats 16b and hence of
spring 17 mounted therein. The inner end of each mem
ber 21 is provided with a male threaded portion 21e for
threaded engagement in the corresponding end of the
spring 17 projecting into the block counter bore 23. With
this arrangement the set screw 22 can be slightly backed
oil to release the member 21 for rotation by a tool ap
plied to the squared end 2lb projecting externally of
block 12; and the spring length between the anchors may
be varied by rotation of one of or both members 21 to
extend or contract the spring, thereby varying the inter
turn spacing and the effective openings of the nozzle face
p The spring length may be so chosen that for the mini
mum desired turn spacing the spring is under tension
compact arrangement in comparison with the end clamp
ing means which would be required with the less pre
ferred flattened form of spring.
I claim:
l. In a vacuum cleaner, for continually moving sheet
or web material such as paper or the like, including an
elongated narrow nozzle structure forming a slot type
vacuum inlet adapted to be disposed transversely across
the path of the moving web material, and having also a
material contacting elongated face plate structure disposed
along said inlet, that improvement comprising: an elon
gated wound spring of substantially like external form
throughout its length having adjacent turns spaced to
provide openings therebetween and extending along the
entire length of the inlet opening of said vacuum nozzle,
and means on the vacuum nozzle deiining a slot as said
inlet opening and forming a longitudinal seat adapted to
embrace spaced longitudinal portions of said elongated
wound spring on opposite sides of said inlet opening and
when installed, so that upon withdrawal of even one set 20 maintain said spring in said inlet opening with a longi
tudinal portion of the spring exposed as a material-con
screw from engagement with the groove of a correspond
tacting face plate.
ing member 21, the member 21 is released inwardly under
2. That improvement described in claim 1 including,
spring contracting force, thereby causing accumulated cle
means on the nozz'le structure engaging opposite ends of
bris on the spring turns to be loosened and so eiîecting
cleaning of the spring. If desired the projecting end 2lb
said spring for anchoring the spring in adjusted length.
may have a hole 21d therethrough providing means for
engagement by a wire hook or other means for retaining
control thereof, so that the anchor member cannot escape
least one of said anchoring means has a portion ac
entirely into the interior of the assembly and also to
3. The improvement described in claim 2 wherein at
cessible externally of the nozzle structure and operable
to release said spring for expansion and contraction of
provide means for repeated manual extension and con 30 the spring for spring cleaning operations while in place.
4. The face plate improvement as set forth in claim l
traction of the spring if required for spring cleaning
From the above description it is apparent that a rela
tively low cost construction is provided Ifor a face plate
in comparison with those commonly now used; and that
the disclosed construction has the further advantages of
adjnstability, ease of cleaning at the site of installation
or place of operation, and usually also of obviating any
need for withdrawing the cleaning head from normal posi
tion. Further the use of the plates 16', either light plates 40
or heavy guage sheet which may be coined or otherwise
where said spring is an elongated cylindrical helical spring
having the turns thereof spaced to provide openings there
between when in operable disposition in said seat.
5. The face plate improvement as set forth in claim 4
including anchor means at opposite ends of said nozzle
inlet opening for supporting said helical spring endwise,
said anchor means being axially íixedly mounted with
respect to the nozzle structure and having threaded por
tions threadably engaged With respective end portions of
said spring.
6. The face plate improvement as set forth in claim 5
formed along one margin to provide respective seat forma
wherein said anchor means includes a male threaded
tion 16b along with the separate plates 15 assembled
member releasably axially fixed in but rotatably sup
thereto for support of the brushes B, is to be preferred
-to machining concave seats along margins of a single 45 ported by said nozzle structure at opposite ends thereof,
at least one of said threaded members having outboard
heavy plate corresponding in thickness to 16 and 15; al
means adapted for exterior rotational engagement.
though even where the latter expedient is used the general
advantages of the invention are still attained, including
References Cited in the tile of this patent
even a lower fabrication cost in comparison with the
usual type of face plate.
Also the use of the helical spring as above described is
Boegel ____________ __ Mar. 10, 1908
preferable to the use of a ñattened type spring of the
Langer ______________ __ Mar. 8, 1932
Hayward ____________ -_ Dec. 5, 1950
tween the internal opposed »faces of the turns which gives 55 2,809,073
a larger air flow area and longer operational periods
between cleanings; and also because of the secure anchor
Wahlert ______________ __ Oct. 8, 1957
Bruno ______________ __ Oct. 18, 1960
form, for example, such as that sometimes used as a wrist
watch band, because of the larger cylindrical space be
ing of the ends by their threaded engagement above dis
closed, its ease of adjustability and accessibility in a
Great Britain ________ _- Sent. 21. 1906
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