EP0970754A1 - Spray gumming unit - Google Patents
Spray gumming unit Download PDFInfo
- Publication number
- EP0970754A1 EP0970754A1 EP99113179A EP99113179A EP0970754A1 EP 0970754 A1 EP0970754 A1 EP 0970754A1 EP 99113179 A EP99113179 A EP 99113179A EP 99113179 A EP99113179 A EP 99113179A EP 0970754 A1 EP0970754 A1 EP 0970754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channels
- channel
- conduit
- valve
- gum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
- B05B12/06—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for effecting pulsating flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/12—Fluid oscillators or pulse generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators
- B05B1/083—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators the pulsating mechanism comprising movable parts
Definitions
- the present invention relates to a spray gumming unit.
- the present invention relates to a spray gumming unit especially suitable for use on a cigarette packing machine - to which the following description refers purely by way of example - for gumming sheets of packing material used on the packing machine.
- Known cigarette packing machines normally comprise at least one spray gumming unit having one or more gum spray nozzles, each of which is supplied with gum by a respective supply conduit controlled by a valve comprising a valve body movable back and forth in a control direction between an open and a closed position.
- the valve body may be, for example, a pin movable axially along the conduit, or a shutter movable crosswise to the conduit.
- the above gumming units are normally used to deposit a succession of gum spots on blanks fed continuously past the nozzles. And to deposit each gum spot, the respective nozzle must be opened for a very short length of time, and the respective valve body moved fairly rapidly back and forth in said control direction between the open and closed position.
- valves of the above type fail to meet the extremely high operating speeds demanded on modern cigarette packing machines (capable of producing over 600 packets a minute) on account of the valve body, when depositing each gum spot, moving back and forth along the same path (in a first direction from the closed to the open position, and in the opposite direction from the open to the closed position). Which back and forth movement cannot be achieved rapidly on account of the mechanical inertia involved.
- a spray gumming unit comprising a spray nozzle; a conduit for supplying gum to said spray nozzle; and valve means along said conduit and for controlling the conduit itself; characterized in that said valve means comprise two channels defining an intermediate portion of said conduit; two guides extending crosswise to said channels; two valve bodies, each movable along a respective said guide; and actuating means for moving each said valve body, along the respective said guide, between a first position wherein the valve body cuts off a first of said two channels and leaves a second of said two channels open, and a second position wherein the valve body cuts off said second channel and leaves said first channel open.
- Number 1 in Figure 1 indicates as a whole a spray gumming unit comprising a spray nozzle 2 connected to a supply device 3 for feeding gum 4 along a conduit 5 controlled by valve device defined by a distributor 6 on conduit 5.
- Supply device 3 comprises a tank 7 containing gum 4, and from which a pump 8 feeds gum 4 to conduit 5 at a constant pressure regulated by a control unit 9.
- Distributor 6 comprises two parallel channels 10 and 11 defining an intermediate portion 12 of conduit 5, and through which extend transversely two guide conduits 13 and 14 engaged by respective valve bodies 15 and 16, each of which is moved along respective conduit 13, 14 by an actuating device 17 and in opposition to a respective spring 18.
- Actuating device 17 comprises two known electromechanical actuators 19 and 20 associated respectively with bodies 15 and 16, and is controlled by control unit 9.
- Each body 15, 16 is moved by actuating device 17 between a first position wherein body 15, 16 cuts off a first channel 10, 11 and leaves a second channel 11, 10 open, and a second position wherein body 15, 16 cuts off said second channel 11, 10 and leaves said first channel 10, 11 open.
- Each body 15, 16 comprises an element 21 sliding in fluidtight manner along respective conduit 13, 14, and in which are defined two annular grooves 22 separated by a distance other (in particular, as shown in the Figure 1 embodiment, smaller) than the distance between channels 10 and 11.
- a first of the two grooves 22 communicates with a first channel 10, 11, and a second channel 11, 10 is cut off by element 21; and in said second position, a second of the two grooves 22 communicates with said second channel 11, 10, and said first channel 10, 11 is cut off by element 21.
- distributor 6 may assume an enabling position (as shown for example in Figures 1 and 2b) in which bodies 15 and 16 are so positioned as to leave channel 10 or 11 open; or a disabling position (as shown for example in Figures 2a and 2c) in which bodies 15 and 16 are so positioned as to each close a respective channel 10, 11 and so prevent supply of gum 4 from supply device 3 to nozzle 2, which is thus deactivated.
- a nonreturn valve 24 is provided along each channel 10, 11, close to nozzle 2.
- nozzle 2 To deposit a gum spot on a blank 23 fed continuously past nozzle 2, nozzle 2 must be activated, i.e. connected hydraulically to supply device 3, for a very short length of time.
- Distributor 6 is normally set to said disabling position - as shown for example in Figure 2a - in which valve body 15 is in said first position cutting off channel 10 and leaving channel 11 open, and valve body 16 is in said second position cutting off channel 11 and leaving channel 10 open. That is, with bodies 15 and 16 positioned as described above, both channels 10 and 11 are closed.
- control unit 9 commands actuating device 17 to move body 16 from said second position to said first position, in which both bodies 15, 16 leave channel 11 open ( Figure 2b) and close channel 10, thus enabling gum 4 to flow along channel 11 to nozzle 2.
- Supply of gum 4 to nozzle 2 is cut off, not by moving body 16 back to its original position cutting off channel 11, but by moving body 15 from its original position cutting off channel 10, i.e. from the first position to the second position cutting off channel 11.
- Supply of gum 4 to nozzle 2 is therefore cut off by body 16 being maintained ( Figure 2c) in the first position cutting off channel 10.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Confectionery (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Materials For Medical Uses (AREA)
Abstract
A spray gumming unit (1) wherein a conduit (5) for
supplying gum (4) to a spray nozzle (2) has an
intermediate portion (12) defined by two channels (10,
11) extending through a distributor (6) having two valve
bodies (15, 16), each of which is movable, crosswise to
the two channels (10, 11), between a first position
wherein the valve body (15, 16) cuts off a first (10) of
the two channels (10, 11) and leaves a second (11) of
the two channels (10, 11) open, and a second position
wherein the valve body (15, 16) cuts off the second
channel (11) and leaves the first channel (10) open.
Description
The present invention relates to a spray gumming
unit.
In particular, the present invention relates to a
spray gumming unit especially suitable for use on a
cigarette packing machine - to which the following
description refers purely by way of example - for
gumming sheets of packing material used on the packing
machine.
Known cigarette packing machines normally comprise
at least one spray gumming unit having one or more gum
spray nozzles, each of which is supplied with gum by a
respective supply conduit controlled by a valve
comprising a valve body movable back and forth in a
control direction between an open and a closed position.
In various known embodiments, the valve body may be, for
example, a pin movable axially along the conduit, or a
shutter movable crosswise to the conduit.
On known packing machines, the above gumming units
are normally used to deposit a succession of gum spots
on blanks fed continuously past the nozzles. And to
deposit each gum spot, the respective nozzle must be
opened for a very short length of time, and the
respective valve body moved fairly rapidly back and
forth in said control direction between the open and
closed position.
Though perfectly effective, valves of the above
type fail to meet the extremely high operating speeds
demanded on modern cigarette packing machines (capable
of producing over 600 packets a minute) on account of
the valve body, when depositing each gum spot, moving
back and forth along the same path (in a first direction
from the closed to the open position, and in the
opposite direction from the open to the closed
position). Which back and forth movement cannot be
achieved rapidly on account of the mechanical inertia
involved.
It is an object of the present invention to provide
a spray gumming unit designed to eliminate the
aforementioned drawbacks, and which at the same time is
cheap and easy to produce.
According to the present invention, there is
provided a spray gumming unit comprising a spray nozzle;
a conduit for supplying gum to said spray nozzle; and
valve means along said conduit and for controlling the
conduit itself; characterized in that said valve means
comprise two channels defining an intermediate portion
of said conduit; two guides extending crosswise to said
channels; two valve bodies, each movable along a
respective said guide; and actuating means for moving
each said valve body, along the respective said guide,
between a first position wherein the valve body cuts off
a first of said two channels and leaves a second of said
two channels open, and a second position wherein the
valve body cuts off said second channel and leaves said
first channel open.
A non-limiting embodiment of the present invention
will be described by way of example with reference to
the accompanying drawings, in which:
Number 1 in Figure 1 indicates as a whole a spray
gumming unit comprising a spray nozzle 2 connected to a
supply device 3 for feeding gum 4 along a conduit 5
controlled by valve device defined by a distributor 6 on
conduit 5.
Each body 15, 16 is moved by actuating device 17
between a first position wherein body 15, 16 cuts off a
first channel 10, 11 and leaves a second channel 11, 10
open, and a second position wherein body 15, 16 cuts off
said second channel 11, 10 and leaves said first channel
10, 11 open.
Each body 15, 16 comprises an element 21 sliding in
fluidtight manner along respective conduit 13, 14, and
in which are defined two annular grooves 22 separated by
a distance other (in particular, as shown in the Figure
1 embodiment, smaller) than the distance between
channels 10 and 11.
As shown in Figure 2, for each body 15, 16 in said
open position, a first of the two grooves 22
communicates with a first channel 10, 11, and a second
channel 11, 10 is cut off by element 21; and in said
second position, a second of the two grooves 22
communicates with said second channel 11, 10, and said
first channel 10, 11 is cut off by element 21.
As shown in Figure 2, distributor 6 may assume an
enabling position (as shown for example in Figures 1 and
2b) in which bodies 15 and 16 are so positioned as to
leave channel 10 or 11 open; or a disabling position (as
shown for example in Figures 2a and 2c) in which bodies
15 and 16 are so positioned as to each close a
respective channel 10, 11 and so prevent supply of gum 4
from supply device 3 to nozzle 2, which is thus
deactivated.
In the Figure 1 embodiment, a nonreturn valve 24 is
provided along each channel 10, 11, close to nozzle 2.
Operation of unit 1 will now be described with
particular reference to Figure 2.
To deposit a gum spot on a blank 23 fed
continuously past nozzle 2, nozzle 2 must be activated,
i.e. connected hydraulically to supply device 3, for a
very short length of time.
To deposit a gum spot on blank 23, control unit 9
commands actuating device 17 to move body 16 from said
second position to said first position, in which both
bodies 15, 16 leave channel 11 open (Figure 2b) and
close channel 10, thus enabling gum 4 to flow along
channel 11 to nozzle 2. Supply of gum 4 to nozzle 2 is
cut off, not by moving body 16 back to its original
position cutting off channel 11, but by moving body 15
from its original position cutting off channel 10, i.e.
from the first position to the second position cutting
off channel 11. Supply of gum 4 to nozzle 2 is therefore
cut off by body 16 being maintained (Figure 2c) in the
first position cutting off channel 10.
In the course of each gumming cycle, therefore, the
time interval between activation and deactivation of
nozzle 2 is extremely short, by nozzle 2 being activated
and deactivated by two distinct mechanical members
(bodies 15 and 16), each of which performs one stroke in
one direction, thus considerably reducing the mechanical
inertia involved.
Claims (4)
- A spray gumming unit comprising a spray nozzle (2); a conduit (5) for supplying gum (4) to said spray nozzle (2); and valve means (6) along said conduit (5) and for controlling the conduit (5) itself; characterized in that said valve means (6) comprise two channels (10, 11) defining an intermediate portion (12) of said conduit (5); two guides (13, 14) extending crosswise to said channels (10, 11); two valve bodies (15, 16), each movable along a respective said guide (13, 14); and actuating means (17) for moving each said valve body (15, 16), along the respective said guide (13, 14), between a first position wherein the valve body (15, 16) cuts off a first (10) of said two channels (10, 11) and leaves a second (11) of said two channels (10, 11) open, and a second position wherein the valve body (15, 16) cuts off said second channel (11) and leaves said first channel (10) open.
- A unit as claimed in Claim 1, characterized in that each said valve body (15, 16) comprises an element (21) sliding in fluidtight manner along the respective said guide (13, 14), and in which are defined two passages (22) separated by a distance other than the distance between the two channels (10, 11).
- A unit as claimed in Claim 1 or 2, characterized in that said actuating means (17) are electromechanical actuating means.
- A unit as claimed in any one of Claims 1 to 3, characterized by comprising a control unit (9) for commanding said actuating means (17) to move a first (15) of said two valve bodies (15, 16) from said first position to said second position to feed gum (4) to said spray nozzle (2), and to subsequently move a second (16) of said two valve bodies (15, 16) from said second position to said first position to cut off supply of gum (4) to said spray nozzle (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO980420 | 1998-07-08 | ||
IT98BO000420 IT1306313B1 (en) | 1998-07-08 | 1998-07-08 | SPRAY RUBBER UNIT |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0970754A1 true EP0970754A1 (en) | 2000-01-12 |
Family
ID=11343292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113179A Withdrawn EP0970754A1 (en) | 1998-07-08 | 1999-07-07 | Spray gumming unit |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0970754A1 (en) |
IT (1) | IT1306313B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1479517A1 (en) * | 2003-05-17 | 2004-11-24 | Technotrans AG | Valve assembly for the dampening device of a printing machine |
KR20160038292A (en) * | 2014-09-30 | 2016-04-07 | 동의대학교 산학협력단 | Liquid injection apparatus for hydrodynamic |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3420208A (en) * | 1966-12-02 | 1969-01-07 | Lockwood Tech | Pneumatically controlled applicator system for adhesive and the like |
US4177927A (en) * | 1977-12-14 | 1979-12-11 | Simmons Thomas R | Apparatus for shaping and positioning fluid dispersal patterns |
DE2852294A1 (en) * | 1978-12-02 | 1980-07-10 | Wabco Fahrzeugbremsen Gmbh | Periodic pressure impulse generation equipment - has two valves each connected by delay device to input of other |
GB2163528A (en) * | 1984-08-22 | 1986-02-26 | Gd Spa | Valves |
-
1998
- 1998-07-08 IT IT98BO000420 patent/IT1306313B1/en active
-
1999
- 1999-07-07 EP EP99113179A patent/EP0970754A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3420208A (en) * | 1966-12-02 | 1969-01-07 | Lockwood Tech | Pneumatically controlled applicator system for adhesive and the like |
US4177927A (en) * | 1977-12-14 | 1979-12-11 | Simmons Thomas R | Apparatus for shaping and positioning fluid dispersal patterns |
DE2852294A1 (en) * | 1978-12-02 | 1980-07-10 | Wabco Fahrzeugbremsen Gmbh | Periodic pressure impulse generation equipment - has two valves each connected by delay device to input of other |
GB2163528A (en) * | 1984-08-22 | 1986-02-26 | Gd Spa | Valves |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1479517A1 (en) * | 2003-05-17 | 2004-11-24 | Technotrans AG | Valve assembly for the dampening device of a printing machine |
DE10322320B4 (en) * | 2003-05-17 | 2007-03-15 | Technotrans Ag | Valve arrangement for spray dampening of printing machines |
KR20160038292A (en) * | 2014-09-30 | 2016-04-07 | 동의대학교 산학협력단 | Liquid injection apparatus for hydrodynamic |
KR101639124B1 (en) | 2014-09-30 | 2016-07-22 | 동의대학교 산학협력단 | Liquid injection apparatus for hydrodynamic |
Also Published As
Publication number | Publication date |
---|---|
ITBO980420A1 (en) | 2000-01-08 |
IT1306313B1 (en) | 2001-06-04 |
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