CA2030176A1 - Device for the stepwise dispensing of product - Google Patents
Device for the stepwise dispensing of productInfo
- Publication number
- CA2030176A1 CA2030176A1 CA002030176A CA2030176A CA2030176A1 CA 2030176 A1 CA2030176 A1 CA 2030176A1 CA 002030176 A CA002030176 A CA 002030176A CA 2030176 A CA2030176 A CA 2030176A CA 2030176 A1 CA2030176 A1 CA 2030176A1
- Authority
- CA
- Canada
- Prior art keywords
- particular according
- fact
- abutment
- pressing plate
- plate
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/76—Containers or packages with special means for dispensing contents for dispensing fluent contents by means of a piston
- B65D83/765—Containers or packages with special means for dispensing contents for dispensing fluent contents by means of a piston the piston being a follower-piston and the dispensing means comprising a hand-operated pressure device at the opposite part of the container
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type
- G01F11/025—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type with manually operated pistons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F19/00—Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups
- G01F19/005—Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups for semi-liquid, e.g. fat
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to a device for the stepwise rack transport of a pressing plate (24), for instance on dispensers (Sp) for the portioned dispensing of products, for instance products of a paste-like nature, and in order to obtain a solution which is particularly optimal with respect to movement, two abutment plates (I, II) which rest alternately against the rack strips are associated with the pressing plate (24) which is moved by handle displacement, the plates approaching each other against spring force upon displacement of the pressing plate.
The present invention relates to a device for the stepwise rack transport of a pressing plate (24), for instance on dispensers (Sp) for the portioned dispensing of products, for instance products of a paste-like nature, and in order to obtain a solution which is particularly optimal with respect to movement, two abutment plates (I, II) which rest alternately against the rack strips are associated with the pressing plate (24) which is moved by handle displacement, the plates approaching each other against spring force upon displacement of the pressing plate.
Description
2~3~7~
DEVICE FOR THE STEPWISE DISPENSING OF PRODUCT
The present invention relates to a device for the stepwise transport by rack of a pressing plate, for instance on dispensers for the portioned dispensing of products, for example products of a paste-like nature, in which device the pressing plate moves in opposition to the displacement of a handle which returns the basic position under spring action.
A device for stepwise rack transport of this type is known from EP OS O 248 278 (Fig. 102). In that case, the pressing plate is developed as a climbing piston against which the lower end a bag filled with a paste composition rests. Upon displacement of the handle, the edge of the 1, piston cooperates alternately with a transport strip arranged p in pairs and acted on by said edge and a stationary abutment tooth strip provided in pairs. This development, however not only requires the additional expense of an additional pair of toothed strips, but the corresponding increase in size of the roughening zone determined by the tooth structure within the device also results in an additional source of mechanical stress on the wall of the bag and this on an intermittently moveable element. The transport tooth strips namely carry out a forward and return stroke. The roughening action of the toothing which is arranged almost over the full surface on the inside can furthermore also have a braking effect so that the device requires particularly strong restoring springs if it is not to operate sluggishly. This, in its turn, means a higher operating force.
A similar device is known from French Vnexamined : I
Application 2 489 267. In that case, however, the product to be dispensed is delivered in direction opposite the direction : `~
of displacement of the handle.
From US Patent 3 774 816 (Fig. 2), it is known to displace a central rack in direction of delivery via two pawls which act alternately on the rack. A pressing plate which presses the paste composition out is present in this direction.
r Finally, from US Patent 2 361 647 it is known to effect the advance of the pressing plate via a flexible setting member in a shape of a flexible peaked hat, which is arranged centrally on the back of the piston. By pressing against the rim of the hat, as is possible in view of a correspondingly elastic housing wall, the pressing plate is shifted stepwise in the direction towards the dispensing opening of the ~., ; dispenser. This solution is not known to have gained acceptance in practice.
The object of the present invention is to improve a ~; device of this type for the stepwise transport by rack of a pressing plate so that it is of better functional construction and easier to operate.
This object is achieved by the invention set forth in Claim 1.
~.
The subordinate claims set forth further advantageous developments of the device of the invention.
As a result of this development, a device of this type of increased value of use is obtained: the technical expense is reduced; one gets along with only one type of toothed ~` strip, namely the stationary one. This results in gentler :
` treatment of the product. The handling is also more favorable. There is a direct-acting positive control.
~- Specifically, two abutment plates which rest alternately ! against the rack are associated with the pressing plate, they t~ ~ --2--!' S~
2030~
approaching each other upon displacement of the pressing plate in the direction opposite the urging of a spring.
While the one abutment plate serves as stationary support, the other abutment plate is carried along. The abutment plate which is carried along then comes against, and by spring force, pushes the other abutment plate a step forward in the direction of delivery. The relative movement between . . .
the two abutment plates takes place in the back of the product zone. Therefore, the above-indicated stresses do not occur with respect to the moving parts. The trigger for the actuation is the content of the dispenser, which can be placed under pressure load. Specifically in this connection, the loading of the pressing plate is obtained by the action on it of the wall of a cartridge bag containing a paste composition as product, the bag being provided at its upper end with a headpiece which forms the handle at the top and is freely displaceable with axial limitation within a tubular housing. The headpiece which is supported for free displacement with axial limitation makes it possible to transfer the operating force directly to the bag. On the other, bottom end of the bag there is also a favorable balanced central flow of force. The content of the bag itself, due to the mass which forms a supporting core, acts like a "rod" or an extended handle of the headpiece. All of this is contained in protected manner within a tubular housing which is gripped by the hand of the user, the index finger, which extends over the top piece, effecting the axial movement thereof. It is furthermore proposed that each abutment plate have two diametrically opposite detent tongues which engage correspondingly at different levels into the tooth gaps of two opposite rack strips. In view of the ''" .
203~ 76 desirable high flexibility of the detent tongues, with nevertheless good stability of standing, it is advantageous for the detent tongues to have a comb-tooth structure which extends from a downward directed plate rim. Furthermore, one advantageous feature of the development consists therein that the upper abutment plate bears via a bushing the lower abutment plate, the bushing having at its lower end lift fingers which engage below the lower abutment plate and, upon displacement of the pressing plate, displace the lower abutment plate, guided on the bushing, in the direction towards the upper abutment plate. These correspondingly radially directed lift fingers are advisedly arranged at equal angles apart so that the forces of transmission act with equal justification. In this connection, one advantageous embodiment is also seen in the fact that the lift fingers are developed in double-arm fashion and the inward extending arms are acted on by the lower end of a ram of the pressing plate. The inwardly pointing arm is advisedly somewhat shorter than the outwardly pointing arm so that the pressing plate forms a certain increased abutment force and primarily paste composition is forced out. Upon the reaching of a given pressing pressure, the abutment force is overcome, leading to the automatic commencement of the follow-up movement of the transport unit. In view of the desired development with rotational symmetry, the ram is located in the center of the transport unit created. For reasons of attachment as well as functional reasons, it is advisable to develop the end of the ram which cooperates with the inner arm of the lift fingers in dome-shaped manner. Such a solution furthermore proves particularly resistant to wear.
Furthermore, an advantageous development is obtained by a 2030~L7~
snap-button-like clip attachment between the inward extending arms of the lift fingers and a pin on the lower end of the ram. The latter forms the male part while the central opening surrounded by the basic position of the inner ends of the lift fingers forms the female cavity. With respect to the means applying the spring load, a development is favorable in which spring elements for the spreading apart of the abutment plates are provided in the annular space surrounding the bushing. As an alternative, it is, of course, also possible to interpose a coil compression spring, in which case the bushing, which extends in bridge-like manner from abutment plate to abutment plate, could, at the same time, take over the guidance for such a spring. The radial protrusion of the plates beyond the cross section of the bushing creates, almost positively, such a space which can be used as spring chamber. Furthermore, an advantageous development results from the fact that the spring elements are developed as spring tongues which are formed on the one abutment plate and rise in circumferential direction. For this, recourse is had to plastic materials having suitable properties of resilience. Practically all parts of the entire device consist of plastic. One particularly simple way of supporting the double-arm lift fingers is that the lift fingers are formed via film hinges on the lower bushing edge, the film hinges lying somewhat behind the front edge of the bushing. The corresponding backward displacement can advantageously be utilized for lateral guidance of the lift fingers, which is also a feature of the present application.
Furthermore, it is advantageous for the transport unit which consists of pressing plate and abutment plates for a use of the tubular housing having the toothed strips to be rotatable .
2~30~7~
in such a manner that the detent tongues emerge laterally out of the region of the toothed strips in order to obtain free return movement of the transport unit opposite the blocking direction of the teeth into the starting position. The latter is also limited by stop. Such a development is particularly environment-friendly, since it removes from the dispenser its disposable use and the disadvantages inherent therein. Such a dispenser can then be used again repeatedly by insertion of a new cartridge, a new bag, a new stack of tablets, etc. Structurally, it is furthermore of advantage in this connection that the relative movement is effected by turning, namely on a turnable rim on one end of the insert and that the transport unit has radially outwardly directly slide blocks which travel in rail guides of the tubular housing surrounding the insert. This development gains further in importance with regard to desired simple assembly as well as reliability of the transport unit insofar as the lower abutment plate develops passage openings for the lift fingers of the upper abutment plate for a bayonet-like mounting (insert/turn attachment) of the two parts in the manner that the slide blocks lie one above the other in a straight line and the loosening again of the bayonet attachment is secured by the rail guidance of the slide blocks. The pressing plate can be put together as a preassembly and can also be conveniently detached again at any time for the purpose of cleaning, should this become necessary. From the standpoint of manufacturing technique, the following solution is also advantageous, it consisting therein that the upper abutment plate is developed with windows which are arranged aligned with the lift fingers.
Through these windows there can therefore protrude core parts ' 203017~
of the injection mold, which parts are responsible for the shaping of the upper region of the lift fingers.
Another advantageous development with respect to the holding together of the dispenser is obtained by a lock pin of the tubular housing, which pin grips over an end ring of the insert. In this connection, a further advantageous development resides therein that the end ring is provided on the grip-over side with detent troughs for the entrance of the lock pin in the final turned position of the insert.
What is meant here are the two end positions of turning, one of which is reserved for the "dispensing" function and the other for the "filling" function. Thus defined feelable detent positions are present. Finally, the invention also proposes that the headpiece of the cartridge bag be engaged on resilient fingers which are provided on the upper end of the insert. The detent engagement is designed on a reversible association of the headpiece and therefore also in line with continuous reusability of the dispenser.
.,. ~
The object of the invention is explained in further detail below with reference to an embodiment shown in the drawing, in which:
Fig. 1 is a side view of the dispenser provided with the ~J device of the invention with the protective cap which extends `¦ over the dispenser head shown in dot-dash line;
`l '~ Fig. 2 is a vertical section through the dispenser with ~j interior parts only partially also shown in section;
Fig. 3 shows the outer housing, developed as tubular housing, by itself in perspective;
Fig. 4 shows the insert by itself in perspective;
Fig. 5 shows the protective cap in an individual perspective view;
. .
Fig. 6 shows the cartridge bag which is to be filled with the product to be dispensed, together with an adapter and headpiece, in an exploded view;
Fig. 7 shows, also in an exploded view, the transport device insofar as it concerns the pressing plate and the abutment plates, in position of readiness for assembly by plug mounting;
, Fig. 8 shows the lower portion of the dispenser in ; vertical section, in an enlarged view, showing the basic . .
position of the transport unit;
Fig. 9 is an identical view shown in the actuation , position with the lower abutment plate rising;
Fig~ 10 is a view similar to Fig. 8, but showing the new basic position;
Fig. 11 is a cross section along the line XI-XI of Fig.
~ 1 8;
Fig. 12 is a cross section along the line XII-XII of Fig. 9;
" "
!.",' Fig. 13 is a cross section along the line XIII-XIII of Fig. 8;
; Fig. 14 is a cross section corresponding to Fig. 13, but ` in the position in which the detent tongues of the abutment plate are in engagement with the tooth gaps of the rack strips;
~; Fig. 15 is a cross section along the line XV-XV of Fig.
! 8, with the detent tongues out of engagement;
: .
Fig. 16 is a similar view with the detent tongues in :.
''':;
203017~
detent engagement with the rack strips;
Fig. 17 is a perspective view of the two abutment plates clip-attached to each other over the ram, with the lift fingers in basic position; and Fig. 18 is a similar view with the lift fingers brought into active position (the last two figures are free-hand sketches).
The dispenser Sp shown in the drawing and which incorporates the device of the invention serves, for instanse, for the dispensing of the paste composition 1 which is contained in an elongated tube-like bag cartridge 2.
After the emptying of the bag cartridge 2, which is formed of collapsible material, for instance plastic foil, and its removal, a new bag cartridge 2 can be inserted into the dispenser Sp. Its introduction is effected from the upper end of the dispenser Sp, which is developed as a standing unit. On its bottom the dispenser is opened to a cross sectional extent which is less than the diameter of the fully :-.
filled bag cartridge 2.
Components of the dispenser Sp are an outer housing, designated by the tubular housing 3, and an insert 4 which can be incorporated therein. This insert has a contour which is adapted to the cylindrical tubular shape and it rests radially against the inner wall surface 3' of the tubular housing 3. The insert 4 is inserted from above and terminates at the bottom at the most in the same plane as the front end of the tubular housing 8 there which forms a standing rim 5. In order to leave sufficient depth of standing rim, the bottom of the insert 4 is preferably set .
back somewhat inwards.
The standing surface, for instance a bracket for the 2030~76 ;
dispenser Sp, is designated 6.
A section of the insert 4 which forms a turnable rim 8 extends radially as well as axially over the upper front end of the tubular housing 3. Its outer surface can be roughened by longitudinal grooves 9, as indicated in Fig. 3. The axial protrusion of the turnable rim 8 corresponds approximately to the width of one's finger.
As can be noted from Fig. 2, the turnable rim 8 is brought by an outward directed wall offset of the tubular wall of the insert 4 to a plane such that the outer surface ,;~ of the turnable rim 4 is aligned with that of the tubular housing 3. By this wall offset, there is obtained a shoulder 10 which rests on the corresponding flat surface of the front end 7.
As can be clearly noted from Fig. 3, the turnable rim 8 f''.' has four fingers ll produced by free-cutting from the i : :
cylindrically curved wall and arranged at equal angles apart.
, Each of the fingers is provided at its front end with an inward directed detent projection 12. These projections grip over a guide collar 13 of a relatively stiff headpiece 14 ,~ which forms the upper closure of the cartridge bag 2. This ,::, .
,; headpiece, which is guided in the dispenser Sp or insert 4, ~. .
'i, is continued upwards in a spout 15 which rises upward towards ~ the side (see Fig. 6). At least the guide collar 13 is of .
~ cylindrical shape. The mating detent surface for the detent i projections 12 is an annular shoulder 18 produced by wall ` offset.
Referring to Fig. 6, it can be noted that the cartridge bag 2 can be attached by an adapter 19 to the headpiece 14.
The adapter 19 has a downward directed push-on collar 20 for the upper edge 2' of the cartridge bag 2. At the top, a . .
.:
2030~L 7~
connection socket 21 extends from said adapter 19, it being adapted to be attached firmly with a corresponding mating insertion part of the headpiece.
The bottom 2 " of the cartridge bag 2 forms a dome-shaped closure. The paste composition 1 which is surrounded by the wall of the cartridge bag 2 and the headpiece 14, when fully filled, has a high stability of its own or stiffness.
The top of the cap-shaped headpiece 14 which forms a manipulator H is developed as an actuating surface 22. This surface is arranged essentially in the central region of the headp~ece 14.
All of this, when not in use, is covered by a protective cap 23 which passes at the bottom into an insertion-holding collar 23~.
The dispensing of the paste composition 1 through the delivery opening 16 is effected by means of a pressing plate 24. The latter is part of a transport unit T which can be displaced from the bottom region of the dispenser Sp stepwise in the delivery direction x. This transport unit T includes, ` 1 :
in addition to said pressing plate 24, also an upper abutment plate I and a lower abutment plate II, as well as a pair of J rack strips 25, 26. Two diametrically opposite detent tongues rest against the latter in such a manner that the transport unit T can, in condition of tooth-gap engagement, be displaced only in the direction indicated by the arrow x.
~ The detent tongues of the upper abutment plate I are !;` ~ degignat-d27~ and those of the lower abutment plate II 28.
They extend diametrically opposite each other on the abutment plates I, II respectively, which are substantially of circular cross section. on basis of an axial arrangement of , ~1 the abutment plates I and II with free space between them, ;.1 ,, ~, --11--t the tooth-gap engagement takes place accordingly at different heights.
The corresponding rack strips 25, 26 are developed on the insert 4. Each of them, seen in cross section, extends over 90, with adaptation to the course of curvature of the cylindrical tubular housing 3. The rack strips 25, 26 which are also arranged diametrically opposite each other, commence in the region of the shoulder 10 of the insert 4 and extend substantially over the entire axial length of the dispenser Sp. The detent tongues 27, 28 are of a structure similar to the teeth of a comb. Their individual teeth are plate-shaped. They point in the direction of the standing surface 6 and each of them extends from a downwardly bent or :~
vertically directed rim 27' or 28', which is continuous in circumferential direction, of the abutment plates I and II, respectively. The length of the detent tongues 27, 28 measured in axial direction corresponds approximately to twice the height of the rim 27' and 28', respectively. This structure can be noted particularly clearly from Fig. 7. The gaps between the teeth bear the reference number 29. The lower half of the length of the detent tongues is bent slightly obliquely outward.
The teeth of the rack strips 25, 26 are of sawtooth structure so that they present a flank which is oriented substantially transverse to the longitudinal center axis y-y of the dispenser Sp and an upwardly directed oblique flank.
In the region close to the bottom, the rack strips 25, 26 are connected to each other by an end ring 30 of the insert 4. The latter commences on the inside of the rack strips so that its outside diameter remains directed radially inward clearly behind the rack strips.
' 2~31~
For the connecting of the two abutment plates I, II to each other, a centrally located axially directed bushing 31 extends from the upper abutment plate (I). Said bushing passes through a guide collar 32 on the lower abutment plate II. The guide collar faces upward. Lift fingers 33 extend from the lower end of the bushing 31. Said fingers engage below the horizontal-surface bottom of the lower abutment plate II. These are double-arm elements which are developed directly on the lower abutment plate II. The supporting of the lift fingers 33 takes place in the region of the bushing wall in the manner that the one, the inner arm !.~
a of the lift fingers 33 extends into the cross sectional region of the hollow of the bushing 31, and the other, the outwardly extending arm k lies below the annular surface part of the lower abutment plate. As a whole, there are four lift i ~ fingers 33 which are arranged at the same angle and, in basic , .
- position, extend substantially horizontally.
The inwardly extending shorter arms a of the lift fingers 33 lie within the field of action of a ram 34 which is guided displaceably with axial limitation within the hollow of the bushing 31. The ram is an integral component `; of the pressing plate 24. It passes from the bottom of said ::
pressing plate and in basic position its lower, dome-shaped end extends up to approximately the plane of the bottom of the lower abutment plate II. The dome against which the corresponding surfaces of the inwardly directed arms a of the lift fingers 33 rest is designated 34'.
The individual lift fingers 33 are developed, via, in each case, a joint-forming film hinge 35, on the lower edge of the bushing. The film hinges 35 are recessed somewhat with respect to the lower front edge 31' of the bushing. To :.
~ -13-the right and left of the zone forming the film hinge 35 or the articulation place, there are axially oriented parallel free-cut slots 36. In this way the lift fingers 33 lie practically over the entire cross section in radially oriented shafts so that there is an advantageous guidance and lateral support of the lift fingers 33 on the body of the ., bushing.
For the axial passage of the lift fingers 33 through the ' plate surface of the lower abutment plate II, as required for !-.
assembly, the latter has passage openings 37 of corresponding contour which also cover the guide collar 32. It is therefore merely necessary to bring about the congruent position of the crisscross lift fingers 33 and openings of the passage opening 37 in order, by then turning by about 90, to arrive at a bayonet-closure-like assembling of the two parts.
This position of attachment is secured by slide blocks 40 formed on the periphery of the two abutment plates I, II
and extending beyond the plate outside diameter. These blocks are in each case diametrically opposite each other, and, after reaching the bayonet-closure position, assume a position with respect to each other in which they both lie on a straight line one above the other. This is also at the same time precisely the arrangement-correct profiling of the transport unit T for introduction into the dispenser housing (tubular housing 3/insert 4~. The corresponding slot guide for the slide blocks 40 is developed in the form of two rail guides 38 which are also arranged diametrically opposite each other. These rail guides are located on the inner wall ~. .
~; surface 3' of the tubular housing 3. The rail guides 38 extend three-dimensionally parallel to the longitudinal . .; .
~ 2~3~175 center axis y-y of the dispenser sp. There are concerned simply two ribs 39, for instance developed thereon, which form a guide unit, said ribs having at most the radial thickness of the rack strips 25, 26. The inner surface of said ribs 39 terminates in front of the outer narrow edge 30' of the end ring 30.
The axial holding together of the two abutment plates I, II is obtained by a snap-button like clip attachment between the inward extending arms a of the lift fingers 33 and a mushroom-head pin 41 (see Fig. 8). The shank of the mushroom-head pin passes freely through the hollow region left between the ends of the arms a. The mushroom edge grips over the bottom of the heads of the four inwardly directed arms a. The pin 41 extends centrally downwards from the highest point of the dome 34' of the ram 34.
The two abutment plates I, II are urged by spring in opposite directions, so that the lower abutment plate II is ."
~ held at the greatest possible distance from the upper ~ . .
abutment plate, supported by the lift fingers 33 and the pin 41 or the dome 34' on which the inner arms a rest, as well as on the lower mushroom edge. The corresponding spreading spring can consist of a coil compression spring placed over the bushing 31. In the embodiment shown, however, there is preferred a solution in which strap-shaped spring elements 43 for the spreading apart of the abutment plates I, II are provided in the annular space 42 surrounding the bushing 31.
The spring elements 43 find a protective spring chamber between it, in any event, by corresponding axial overhang of the plate over the bushing. Specifically, the spring elements 43 are developed as spring tongues ascending in circumferential direction following the curvature of the . ., dispenser wall which are developed on the one abutment plate.
In the embodiment shown, the spring elements extend from the lower abutment plate II, at a sufficient distance from the periphery of the plate in such a manner that they still pass behind the rim 27' of the upper annular plate and find at the top a closed annular supporting shoulder.
In the fully spread position which the transport unit T
assumes in its basic position, both abutment plates are at an axial distance from each other equal to approximately three full tooth-gap spacings. This free stroke passage is designated z (and could even be smaller, for instance extend over only one tooth spacing).
The transport device also leaves an approximately corresponding axial distance between the top of the upper abutment plate I and the bottom of the pressing plate 24.
The lower edge of the guide collar 13 takes up the same axial distance for the inner step 44 of the insert 4 produced by wall offset.
On basis of the window-like, longitudinally oriented free space (window 50) left between the rack strips 25, 26, the transport unit T consisting of pressing plate 24 and the abutment plates I, II can be turned, with stroke limitation, within the tubular housing 3 together with the insert 4 having the rack strips 25, 26 in such a manner that the rack strips 25, 26 can swing completely out of the region of the detent tongues 27, 28 so as to obtain free return movement of the transport unit T opposite the blocking direction of the teeth. This is effected simply by grasping the turnable rim ,.:
8. In order to make the instantaneous position also apparent to the user, two marks, 45 and 46, are provided on the outer wall of the tubular housing 3 (see Fig. 1). A counter mark '"
2~30~7~
47 is present opposite them on the moveable part, namely the turnable rim 8. If this counter mark 47 is brought into alignment with the mark 45, then the position of readiness of :
the dispenser is present; on the other hand, if the counter mark 47 is brought into linear alignment with the mark 46 by the turning of the insert 4, then the dispenser can be filled.
The corresponding end positions are not only stop-limited in the manner that the narrow edges of the rack strips 25, 26 travel against one or the other side of the ribs 39 which extend into the window 50, but rather, at the :~, ~
; same time, there is a perceptible securing of these end b.~ ~ positions in the manner that a member of the tubular housing 3 which serves as detent pin and at the same time as locking .,. :, pin 48 cooperates with the above-mentioned end ring 30 of the insert 4. Reference is had to Figs. 13 and 14. There, the said locking pin 48 extends from the inside of the tubular ~' housing 3 directed radially to the center. It grips over the ! ~ section of the end ring 30 which is clamped in bridge-like manner freely between the rack strips 25, 26, the end ring having corresponding spring properties. The gripping side j ~
30'' of the end ring 30 which faces the headpiece 14 forms, within the region of the angle-of-rotation section of the insert 4, two detent troughs 49 for the entrance of the 1 . ~
I; locking pin in the corresponding end position of rotation of . . ;, , .
; the insert 4. The detent troughs are transversely rounded :~. , grooves the bore center axis of which still lies somewhat above the plane of the over-grip surface 30 " so that excessively hard blockings do not occur. The locking pin 48 can, when developed integral, be made so flexible that it can be pressed substantially into snap engagement behind the , ' ~ ~ .
. . .
203~fi grip-over side 30''. On the other hand, however, an attachment of the locking pin 48 by thread attachment is also possible in the manner that it is simply screwed through a corresponding threaded bore in the tubular housing 3.
The operation of the device of the dispenser is as follows:
By exerting a pressure force in the direction indicated by arrow P, the top headpiece 14 is displaced opposite the direction of the arrow x. The paste composition 1 comes under pressure since the fully filled cartridge bag 2 rests against the pressing plate 34 as against an abutment. It (1) emerges, shaped as a strand through the delivery opening 16.
When a given pressure threshold is reached, the resistance collapses. The pressing plate 24 is now moved downward over the filling column of the cartridge bag 2. Its ram 34 moves downward, guided in the bushing 31. The upper abutment plate I rests still via its detent tongues 27 against the stationary toothing of the rack strips 25, 26. The lower abutment plate II, on the other hand, is displaced against the direction of the spring load in direction of delivery with further cocking or loading of the spreading spring (spring element 43). It approaches the supported upper abutment plate I, for instance with utilization of a partial-stroke section of the stroke free path z or with full use of said stroke free path z. Upon this downward movement of the ram 31, the lift fingers 33 are namely swung around their articulation axis. This has the result, due to the double-arm nature and the conditions of attachment, that the outward pointing arms 6 lift the lower abutment plate II. We have the situation shown in Fig. 9. The detent tongues 28 of the lower abutment plate II now hook in the higher plane. If the '~
,: ..
.....
f', ~ pressure load is now removed from the headpiece 14, then a `:~
continuous lifting of the upper abutment part I takes place due to the force of the spring elements 43 with the carrying alonq of the pressing plate 24 and the lifting of the bag cartridge into the delivery position. The upper abutment plate I now, in its turn, enters into the hooking with the rack strips 25, 26.
If the transport device T comes into the region close to the headpiece with corresponding emptying of the cartridge bag, then only an idle actuation is still obtained. The user now need only pull the emptied cartridge bag out of the .i, dispenser by grasping the headpiece 14 and overcoming the ,;
-l~ detent projections 12. By turning the turnable part 8 in 1 such a manner that counter mark 47 and mark 46 are opposite ....
each other, the abutment plates I, II have emerged from the field of action of the rack strips 25, 26. The detent tongues 27, 28 lose their support. They lie in the region of the window SO left between the rack strips 25, 26. The transport unit T slides as a result of gravity back into the starting position. After insertion of a new cartridge bag 2, the dispenser is again ready for use.
It should further be added that the development of the lift fingers by injection molding is facilitated insofar as core parts~can pass through windows SO of the uppor abutment plate I. These windows 51 are so dimensioned that sufficient spring abutment surface for the spring elements 43 is still prosent in the edge region.
The solid development of tho ram 34 shown in the section views of Fig. lS and Fig. 1~ has not been adopted in actual practlce in order to save material; rather, this ram 34 is hollow. Reference is had to Fig. 7, where two parallel ~':`', .
.,~, , .
i. .
203017~
shafts open from the top remain, they resulting in a satisfactorily thin wall, possibly leaving inbetween a continuous axially aligned partition 52 which extends up into the head of the dome 34'.
The upper side of the pressing plate 24 is continued further upwards into a dome-shaped development 53 which pushes itself into the flexible bottom of the bag 2, and in the final delivery position, favors a delivery of the paste composition 1 which is substantially free of loss.
The rail guides 34 are closed at the bottom.
The features of the invention which are disclosed in the above specification, drawing and claims may be of importance for the reduction to practice of the invention both individually and in any desired combination. All features disclosed are essential to the invention. There is herewith incorporated in the disclosure of the application also the entire disclosure of the corresponding/accompanying priority ; papers (copy of the prior application).
~.' , :
~.
. .
DEVICE FOR THE STEPWISE DISPENSING OF PRODUCT
The present invention relates to a device for the stepwise transport by rack of a pressing plate, for instance on dispensers for the portioned dispensing of products, for example products of a paste-like nature, in which device the pressing plate moves in opposition to the displacement of a handle which returns the basic position under spring action.
A device for stepwise rack transport of this type is known from EP OS O 248 278 (Fig. 102). In that case, the pressing plate is developed as a climbing piston against which the lower end a bag filled with a paste composition rests. Upon displacement of the handle, the edge of the 1, piston cooperates alternately with a transport strip arranged p in pairs and acted on by said edge and a stationary abutment tooth strip provided in pairs. This development, however not only requires the additional expense of an additional pair of toothed strips, but the corresponding increase in size of the roughening zone determined by the tooth structure within the device also results in an additional source of mechanical stress on the wall of the bag and this on an intermittently moveable element. The transport tooth strips namely carry out a forward and return stroke. The roughening action of the toothing which is arranged almost over the full surface on the inside can furthermore also have a braking effect so that the device requires particularly strong restoring springs if it is not to operate sluggishly. This, in its turn, means a higher operating force.
A similar device is known from French Vnexamined : I
Application 2 489 267. In that case, however, the product to be dispensed is delivered in direction opposite the direction : `~
of displacement of the handle.
From US Patent 3 774 816 (Fig. 2), it is known to displace a central rack in direction of delivery via two pawls which act alternately on the rack. A pressing plate which presses the paste composition out is present in this direction.
r Finally, from US Patent 2 361 647 it is known to effect the advance of the pressing plate via a flexible setting member in a shape of a flexible peaked hat, which is arranged centrally on the back of the piston. By pressing against the rim of the hat, as is possible in view of a correspondingly elastic housing wall, the pressing plate is shifted stepwise in the direction towards the dispensing opening of the ~., ; dispenser. This solution is not known to have gained acceptance in practice.
The object of the present invention is to improve a ~; device of this type for the stepwise transport by rack of a pressing plate so that it is of better functional construction and easier to operate.
This object is achieved by the invention set forth in Claim 1.
~.
The subordinate claims set forth further advantageous developments of the device of the invention.
As a result of this development, a device of this type of increased value of use is obtained: the technical expense is reduced; one gets along with only one type of toothed ~` strip, namely the stationary one. This results in gentler :
` treatment of the product. The handling is also more favorable. There is a direct-acting positive control.
~- Specifically, two abutment plates which rest alternately ! against the rack are associated with the pressing plate, they t~ ~ --2--!' S~
2030~
approaching each other upon displacement of the pressing plate in the direction opposite the urging of a spring.
While the one abutment plate serves as stationary support, the other abutment plate is carried along. The abutment plate which is carried along then comes against, and by spring force, pushes the other abutment plate a step forward in the direction of delivery. The relative movement between . . .
the two abutment plates takes place in the back of the product zone. Therefore, the above-indicated stresses do not occur with respect to the moving parts. The trigger for the actuation is the content of the dispenser, which can be placed under pressure load. Specifically in this connection, the loading of the pressing plate is obtained by the action on it of the wall of a cartridge bag containing a paste composition as product, the bag being provided at its upper end with a headpiece which forms the handle at the top and is freely displaceable with axial limitation within a tubular housing. The headpiece which is supported for free displacement with axial limitation makes it possible to transfer the operating force directly to the bag. On the other, bottom end of the bag there is also a favorable balanced central flow of force. The content of the bag itself, due to the mass which forms a supporting core, acts like a "rod" or an extended handle of the headpiece. All of this is contained in protected manner within a tubular housing which is gripped by the hand of the user, the index finger, which extends over the top piece, effecting the axial movement thereof. It is furthermore proposed that each abutment plate have two diametrically opposite detent tongues which engage correspondingly at different levels into the tooth gaps of two opposite rack strips. In view of the ''" .
203~ 76 desirable high flexibility of the detent tongues, with nevertheless good stability of standing, it is advantageous for the detent tongues to have a comb-tooth structure which extends from a downward directed plate rim. Furthermore, one advantageous feature of the development consists therein that the upper abutment plate bears via a bushing the lower abutment plate, the bushing having at its lower end lift fingers which engage below the lower abutment plate and, upon displacement of the pressing plate, displace the lower abutment plate, guided on the bushing, in the direction towards the upper abutment plate. These correspondingly radially directed lift fingers are advisedly arranged at equal angles apart so that the forces of transmission act with equal justification. In this connection, one advantageous embodiment is also seen in the fact that the lift fingers are developed in double-arm fashion and the inward extending arms are acted on by the lower end of a ram of the pressing plate. The inwardly pointing arm is advisedly somewhat shorter than the outwardly pointing arm so that the pressing plate forms a certain increased abutment force and primarily paste composition is forced out. Upon the reaching of a given pressing pressure, the abutment force is overcome, leading to the automatic commencement of the follow-up movement of the transport unit. In view of the desired development with rotational symmetry, the ram is located in the center of the transport unit created. For reasons of attachment as well as functional reasons, it is advisable to develop the end of the ram which cooperates with the inner arm of the lift fingers in dome-shaped manner. Such a solution furthermore proves particularly resistant to wear.
Furthermore, an advantageous development is obtained by a 2030~L7~
snap-button-like clip attachment between the inward extending arms of the lift fingers and a pin on the lower end of the ram. The latter forms the male part while the central opening surrounded by the basic position of the inner ends of the lift fingers forms the female cavity. With respect to the means applying the spring load, a development is favorable in which spring elements for the spreading apart of the abutment plates are provided in the annular space surrounding the bushing. As an alternative, it is, of course, also possible to interpose a coil compression spring, in which case the bushing, which extends in bridge-like manner from abutment plate to abutment plate, could, at the same time, take over the guidance for such a spring. The radial protrusion of the plates beyond the cross section of the bushing creates, almost positively, such a space which can be used as spring chamber. Furthermore, an advantageous development results from the fact that the spring elements are developed as spring tongues which are formed on the one abutment plate and rise in circumferential direction. For this, recourse is had to plastic materials having suitable properties of resilience. Practically all parts of the entire device consist of plastic. One particularly simple way of supporting the double-arm lift fingers is that the lift fingers are formed via film hinges on the lower bushing edge, the film hinges lying somewhat behind the front edge of the bushing. The corresponding backward displacement can advantageously be utilized for lateral guidance of the lift fingers, which is also a feature of the present application.
Furthermore, it is advantageous for the transport unit which consists of pressing plate and abutment plates for a use of the tubular housing having the toothed strips to be rotatable .
2~30~7~
in such a manner that the detent tongues emerge laterally out of the region of the toothed strips in order to obtain free return movement of the transport unit opposite the blocking direction of the teeth into the starting position. The latter is also limited by stop. Such a development is particularly environment-friendly, since it removes from the dispenser its disposable use and the disadvantages inherent therein. Such a dispenser can then be used again repeatedly by insertion of a new cartridge, a new bag, a new stack of tablets, etc. Structurally, it is furthermore of advantage in this connection that the relative movement is effected by turning, namely on a turnable rim on one end of the insert and that the transport unit has radially outwardly directly slide blocks which travel in rail guides of the tubular housing surrounding the insert. This development gains further in importance with regard to desired simple assembly as well as reliability of the transport unit insofar as the lower abutment plate develops passage openings for the lift fingers of the upper abutment plate for a bayonet-like mounting (insert/turn attachment) of the two parts in the manner that the slide blocks lie one above the other in a straight line and the loosening again of the bayonet attachment is secured by the rail guidance of the slide blocks. The pressing plate can be put together as a preassembly and can also be conveniently detached again at any time for the purpose of cleaning, should this become necessary. From the standpoint of manufacturing technique, the following solution is also advantageous, it consisting therein that the upper abutment plate is developed with windows which are arranged aligned with the lift fingers.
Through these windows there can therefore protrude core parts ' 203017~
of the injection mold, which parts are responsible for the shaping of the upper region of the lift fingers.
Another advantageous development with respect to the holding together of the dispenser is obtained by a lock pin of the tubular housing, which pin grips over an end ring of the insert. In this connection, a further advantageous development resides therein that the end ring is provided on the grip-over side with detent troughs for the entrance of the lock pin in the final turned position of the insert.
What is meant here are the two end positions of turning, one of which is reserved for the "dispensing" function and the other for the "filling" function. Thus defined feelable detent positions are present. Finally, the invention also proposes that the headpiece of the cartridge bag be engaged on resilient fingers which are provided on the upper end of the insert. The detent engagement is designed on a reversible association of the headpiece and therefore also in line with continuous reusability of the dispenser.
.,. ~
The object of the invention is explained in further detail below with reference to an embodiment shown in the drawing, in which:
Fig. 1 is a side view of the dispenser provided with the ~J device of the invention with the protective cap which extends `¦ over the dispenser head shown in dot-dash line;
`l '~ Fig. 2 is a vertical section through the dispenser with ~j interior parts only partially also shown in section;
Fig. 3 shows the outer housing, developed as tubular housing, by itself in perspective;
Fig. 4 shows the insert by itself in perspective;
Fig. 5 shows the protective cap in an individual perspective view;
. .
Fig. 6 shows the cartridge bag which is to be filled with the product to be dispensed, together with an adapter and headpiece, in an exploded view;
Fig. 7 shows, also in an exploded view, the transport device insofar as it concerns the pressing plate and the abutment plates, in position of readiness for assembly by plug mounting;
, Fig. 8 shows the lower portion of the dispenser in ; vertical section, in an enlarged view, showing the basic . .
position of the transport unit;
Fig. 9 is an identical view shown in the actuation , position with the lower abutment plate rising;
Fig~ 10 is a view similar to Fig. 8, but showing the new basic position;
Fig. 11 is a cross section along the line XI-XI of Fig.
~ 1 8;
Fig. 12 is a cross section along the line XII-XII of Fig. 9;
" "
!.",' Fig. 13 is a cross section along the line XIII-XIII of Fig. 8;
; Fig. 14 is a cross section corresponding to Fig. 13, but ` in the position in which the detent tongues of the abutment plate are in engagement with the tooth gaps of the rack strips;
~; Fig. 15 is a cross section along the line XV-XV of Fig.
! 8, with the detent tongues out of engagement;
: .
Fig. 16 is a similar view with the detent tongues in :.
''':;
203017~
detent engagement with the rack strips;
Fig. 17 is a perspective view of the two abutment plates clip-attached to each other over the ram, with the lift fingers in basic position; and Fig. 18 is a similar view with the lift fingers brought into active position (the last two figures are free-hand sketches).
The dispenser Sp shown in the drawing and which incorporates the device of the invention serves, for instanse, for the dispensing of the paste composition 1 which is contained in an elongated tube-like bag cartridge 2.
After the emptying of the bag cartridge 2, which is formed of collapsible material, for instance plastic foil, and its removal, a new bag cartridge 2 can be inserted into the dispenser Sp. Its introduction is effected from the upper end of the dispenser Sp, which is developed as a standing unit. On its bottom the dispenser is opened to a cross sectional extent which is less than the diameter of the fully :-.
filled bag cartridge 2.
Components of the dispenser Sp are an outer housing, designated by the tubular housing 3, and an insert 4 which can be incorporated therein. This insert has a contour which is adapted to the cylindrical tubular shape and it rests radially against the inner wall surface 3' of the tubular housing 3. The insert 4 is inserted from above and terminates at the bottom at the most in the same plane as the front end of the tubular housing 8 there which forms a standing rim 5. In order to leave sufficient depth of standing rim, the bottom of the insert 4 is preferably set .
back somewhat inwards.
The standing surface, for instance a bracket for the 2030~76 ;
dispenser Sp, is designated 6.
A section of the insert 4 which forms a turnable rim 8 extends radially as well as axially over the upper front end of the tubular housing 3. Its outer surface can be roughened by longitudinal grooves 9, as indicated in Fig. 3. The axial protrusion of the turnable rim 8 corresponds approximately to the width of one's finger.
As can be noted from Fig. 2, the turnable rim 8 is brought by an outward directed wall offset of the tubular wall of the insert 4 to a plane such that the outer surface ,;~ of the turnable rim 4 is aligned with that of the tubular housing 3. By this wall offset, there is obtained a shoulder 10 which rests on the corresponding flat surface of the front end 7.
As can be clearly noted from Fig. 3, the turnable rim 8 f''.' has four fingers ll produced by free-cutting from the i : :
cylindrically curved wall and arranged at equal angles apart.
, Each of the fingers is provided at its front end with an inward directed detent projection 12. These projections grip over a guide collar 13 of a relatively stiff headpiece 14 ,~ which forms the upper closure of the cartridge bag 2. This ,::, .
,; headpiece, which is guided in the dispenser Sp or insert 4, ~. .
'i, is continued upwards in a spout 15 which rises upward towards ~ the side (see Fig. 6). At least the guide collar 13 is of .
~ cylindrical shape. The mating detent surface for the detent i projections 12 is an annular shoulder 18 produced by wall ` offset.
Referring to Fig. 6, it can be noted that the cartridge bag 2 can be attached by an adapter 19 to the headpiece 14.
The adapter 19 has a downward directed push-on collar 20 for the upper edge 2' of the cartridge bag 2. At the top, a . .
.:
2030~L 7~
connection socket 21 extends from said adapter 19, it being adapted to be attached firmly with a corresponding mating insertion part of the headpiece.
The bottom 2 " of the cartridge bag 2 forms a dome-shaped closure. The paste composition 1 which is surrounded by the wall of the cartridge bag 2 and the headpiece 14, when fully filled, has a high stability of its own or stiffness.
The top of the cap-shaped headpiece 14 which forms a manipulator H is developed as an actuating surface 22. This surface is arranged essentially in the central region of the headp~ece 14.
All of this, when not in use, is covered by a protective cap 23 which passes at the bottom into an insertion-holding collar 23~.
The dispensing of the paste composition 1 through the delivery opening 16 is effected by means of a pressing plate 24. The latter is part of a transport unit T which can be displaced from the bottom region of the dispenser Sp stepwise in the delivery direction x. This transport unit T includes, ` 1 :
in addition to said pressing plate 24, also an upper abutment plate I and a lower abutment plate II, as well as a pair of J rack strips 25, 26. Two diametrically opposite detent tongues rest against the latter in such a manner that the transport unit T can, in condition of tooth-gap engagement, be displaced only in the direction indicated by the arrow x.
~ The detent tongues of the upper abutment plate I are !;` ~ degignat-d27~ and those of the lower abutment plate II 28.
They extend diametrically opposite each other on the abutment plates I, II respectively, which are substantially of circular cross section. on basis of an axial arrangement of , ~1 the abutment plates I and II with free space between them, ;.1 ,, ~, --11--t the tooth-gap engagement takes place accordingly at different heights.
The corresponding rack strips 25, 26 are developed on the insert 4. Each of them, seen in cross section, extends over 90, with adaptation to the course of curvature of the cylindrical tubular housing 3. The rack strips 25, 26 which are also arranged diametrically opposite each other, commence in the region of the shoulder 10 of the insert 4 and extend substantially over the entire axial length of the dispenser Sp. The detent tongues 27, 28 are of a structure similar to the teeth of a comb. Their individual teeth are plate-shaped. They point in the direction of the standing surface 6 and each of them extends from a downwardly bent or :~
vertically directed rim 27' or 28', which is continuous in circumferential direction, of the abutment plates I and II, respectively. The length of the detent tongues 27, 28 measured in axial direction corresponds approximately to twice the height of the rim 27' and 28', respectively. This structure can be noted particularly clearly from Fig. 7. The gaps between the teeth bear the reference number 29. The lower half of the length of the detent tongues is bent slightly obliquely outward.
The teeth of the rack strips 25, 26 are of sawtooth structure so that they present a flank which is oriented substantially transverse to the longitudinal center axis y-y of the dispenser Sp and an upwardly directed oblique flank.
In the region close to the bottom, the rack strips 25, 26 are connected to each other by an end ring 30 of the insert 4. The latter commences on the inside of the rack strips so that its outside diameter remains directed radially inward clearly behind the rack strips.
' 2~31~
For the connecting of the two abutment plates I, II to each other, a centrally located axially directed bushing 31 extends from the upper abutment plate (I). Said bushing passes through a guide collar 32 on the lower abutment plate II. The guide collar faces upward. Lift fingers 33 extend from the lower end of the bushing 31. Said fingers engage below the horizontal-surface bottom of the lower abutment plate II. These are double-arm elements which are developed directly on the lower abutment plate II. The supporting of the lift fingers 33 takes place in the region of the bushing wall in the manner that the one, the inner arm !.~
a of the lift fingers 33 extends into the cross sectional region of the hollow of the bushing 31, and the other, the outwardly extending arm k lies below the annular surface part of the lower abutment plate. As a whole, there are four lift i ~ fingers 33 which are arranged at the same angle and, in basic , .
- position, extend substantially horizontally.
The inwardly extending shorter arms a of the lift fingers 33 lie within the field of action of a ram 34 which is guided displaceably with axial limitation within the hollow of the bushing 31. The ram is an integral component `; of the pressing plate 24. It passes from the bottom of said ::
pressing plate and in basic position its lower, dome-shaped end extends up to approximately the plane of the bottom of the lower abutment plate II. The dome against which the corresponding surfaces of the inwardly directed arms a of the lift fingers 33 rest is designated 34'.
The individual lift fingers 33 are developed, via, in each case, a joint-forming film hinge 35, on the lower edge of the bushing. The film hinges 35 are recessed somewhat with respect to the lower front edge 31' of the bushing. To :.
~ -13-the right and left of the zone forming the film hinge 35 or the articulation place, there are axially oriented parallel free-cut slots 36. In this way the lift fingers 33 lie practically over the entire cross section in radially oriented shafts so that there is an advantageous guidance and lateral support of the lift fingers 33 on the body of the ., bushing.
For the axial passage of the lift fingers 33 through the ' plate surface of the lower abutment plate II, as required for !-.
assembly, the latter has passage openings 37 of corresponding contour which also cover the guide collar 32. It is therefore merely necessary to bring about the congruent position of the crisscross lift fingers 33 and openings of the passage opening 37 in order, by then turning by about 90, to arrive at a bayonet-closure-like assembling of the two parts.
This position of attachment is secured by slide blocks 40 formed on the periphery of the two abutment plates I, II
and extending beyond the plate outside diameter. These blocks are in each case diametrically opposite each other, and, after reaching the bayonet-closure position, assume a position with respect to each other in which they both lie on a straight line one above the other. This is also at the same time precisely the arrangement-correct profiling of the transport unit T for introduction into the dispenser housing (tubular housing 3/insert 4~. The corresponding slot guide for the slide blocks 40 is developed in the form of two rail guides 38 which are also arranged diametrically opposite each other. These rail guides are located on the inner wall ~. .
~; surface 3' of the tubular housing 3. The rail guides 38 extend three-dimensionally parallel to the longitudinal . .; .
~ 2~3~175 center axis y-y of the dispenser sp. There are concerned simply two ribs 39, for instance developed thereon, which form a guide unit, said ribs having at most the radial thickness of the rack strips 25, 26. The inner surface of said ribs 39 terminates in front of the outer narrow edge 30' of the end ring 30.
The axial holding together of the two abutment plates I, II is obtained by a snap-button like clip attachment between the inward extending arms a of the lift fingers 33 and a mushroom-head pin 41 (see Fig. 8). The shank of the mushroom-head pin passes freely through the hollow region left between the ends of the arms a. The mushroom edge grips over the bottom of the heads of the four inwardly directed arms a. The pin 41 extends centrally downwards from the highest point of the dome 34' of the ram 34.
The two abutment plates I, II are urged by spring in opposite directions, so that the lower abutment plate II is ."
~ held at the greatest possible distance from the upper ~ . .
abutment plate, supported by the lift fingers 33 and the pin 41 or the dome 34' on which the inner arms a rest, as well as on the lower mushroom edge. The corresponding spreading spring can consist of a coil compression spring placed over the bushing 31. In the embodiment shown, however, there is preferred a solution in which strap-shaped spring elements 43 for the spreading apart of the abutment plates I, II are provided in the annular space 42 surrounding the bushing 31.
The spring elements 43 find a protective spring chamber between it, in any event, by corresponding axial overhang of the plate over the bushing. Specifically, the spring elements 43 are developed as spring tongues ascending in circumferential direction following the curvature of the . ., dispenser wall which are developed on the one abutment plate.
In the embodiment shown, the spring elements extend from the lower abutment plate II, at a sufficient distance from the periphery of the plate in such a manner that they still pass behind the rim 27' of the upper annular plate and find at the top a closed annular supporting shoulder.
In the fully spread position which the transport unit T
assumes in its basic position, both abutment plates are at an axial distance from each other equal to approximately three full tooth-gap spacings. This free stroke passage is designated z (and could even be smaller, for instance extend over only one tooth spacing).
The transport device also leaves an approximately corresponding axial distance between the top of the upper abutment plate I and the bottom of the pressing plate 24.
The lower edge of the guide collar 13 takes up the same axial distance for the inner step 44 of the insert 4 produced by wall offset.
On basis of the window-like, longitudinally oriented free space (window 50) left between the rack strips 25, 26, the transport unit T consisting of pressing plate 24 and the abutment plates I, II can be turned, with stroke limitation, within the tubular housing 3 together with the insert 4 having the rack strips 25, 26 in such a manner that the rack strips 25, 26 can swing completely out of the region of the detent tongues 27, 28 so as to obtain free return movement of the transport unit T opposite the blocking direction of the teeth. This is effected simply by grasping the turnable rim ,.:
8. In order to make the instantaneous position also apparent to the user, two marks, 45 and 46, are provided on the outer wall of the tubular housing 3 (see Fig. 1). A counter mark '"
2~30~7~
47 is present opposite them on the moveable part, namely the turnable rim 8. If this counter mark 47 is brought into alignment with the mark 45, then the position of readiness of :
the dispenser is present; on the other hand, if the counter mark 47 is brought into linear alignment with the mark 46 by the turning of the insert 4, then the dispenser can be filled.
The corresponding end positions are not only stop-limited in the manner that the narrow edges of the rack strips 25, 26 travel against one or the other side of the ribs 39 which extend into the window 50, but rather, at the :~, ~
; same time, there is a perceptible securing of these end b.~ ~ positions in the manner that a member of the tubular housing 3 which serves as detent pin and at the same time as locking .,. :, pin 48 cooperates with the above-mentioned end ring 30 of the insert 4. Reference is had to Figs. 13 and 14. There, the said locking pin 48 extends from the inside of the tubular ~' housing 3 directed radially to the center. It grips over the ! ~ section of the end ring 30 which is clamped in bridge-like manner freely between the rack strips 25, 26, the end ring having corresponding spring properties. The gripping side j ~
30'' of the end ring 30 which faces the headpiece 14 forms, within the region of the angle-of-rotation section of the insert 4, two detent troughs 49 for the entrance of the 1 . ~
I; locking pin in the corresponding end position of rotation of . . ;, , .
; the insert 4. The detent troughs are transversely rounded :~. , grooves the bore center axis of which still lies somewhat above the plane of the over-grip surface 30 " so that excessively hard blockings do not occur. The locking pin 48 can, when developed integral, be made so flexible that it can be pressed substantially into snap engagement behind the , ' ~ ~ .
. . .
203~fi grip-over side 30''. On the other hand, however, an attachment of the locking pin 48 by thread attachment is also possible in the manner that it is simply screwed through a corresponding threaded bore in the tubular housing 3.
The operation of the device of the dispenser is as follows:
By exerting a pressure force in the direction indicated by arrow P, the top headpiece 14 is displaced opposite the direction of the arrow x. The paste composition 1 comes under pressure since the fully filled cartridge bag 2 rests against the pressing plate 34 as against an abutment. It (1) emerges, shaped as a strand through the delivery opening 16.
When a given pressure threshold is reached, the resistance collapses. The pressing plate 24 is now moved downward over the filling column of the cartridge bag 2. Its ram 34 moves downward, guided in the bushing 31. The upper abutment plate I rests still via its detent tongues 27 against the stationary toothing of the rack strips 25, 26. The lower abutment plate II, on the other hand, is displaced against the direction of the spring load in direction of delivery with further cocking or loading of the spreading spring (spring element 43). It approaches the supported upper abutment plate I, for instance with utilization of a partial-stroke section of the stroke free path z or with full use of said stroke free path z. Upon this downward movement of the ram 31, the lift fingers 33 are namely swung around their articulation axis. This has the result, due to the double-arm nature and the conditions of attachment, that the outward pointing arms 6 lift the lower abutment plate II. We have the situation shown in Fig. 9. The detent tongues 28 of the lower abutment plate II now hook in the higher plane. If the '~
,: ..
.....
f', ~ pressure load is now removed from the headpiece 14, then a `:~
continuous lifting of the upper abutment part I takes place due to the force of the spring elements 43 with the carrying alonq of the pressing plate 24 and the lifting of the bag cartridge into the delivery position. The upper abutment plate I now, in its turn, enters into the hooking with the rack strips 25, 26.
If the transport device T comes into the region close to the headpiece with corresponding emptying of the cartridge bag, then only an idle actuation is still obtained. The user now need only pull the emptied cartridge bag out of the .i, dispenser by grasping the headpiece 14 and overcoming the ,;
-l~ detent projections 12. By turning the turnable part 8 in 1 such a manner that counter mark 47 and mark 46 are opposite ....
each other, the abutment plates I, II have emerged from the field of action of the rack strips 25, 26. The detent tongues 27, 28 lose their support. They lie in the region of the window SO left between the rack strips 25, 26. The transport unit T slides as a result of gravity back into the starting position. After insertion of a new cartridge bag 2, the dispenser is again ready for use.
It should further be added that the development of the lift fingers by injection molding is facilitated insofar as core parts~can pass through windows SO of the uppor abutment plate I. These windows 51 are so dimensioned that sufficient spring abutment surface for the spring elements 43 is still prosent in the edge region.
The solid development of tho ram 34 shown in the section views of Fig. lS and Fig. 1~ has not been adopted in actual practlce in order to save material; rather, this ram 34 is hollow. Reference is had to Fig. 7, where two parallel ~':`', .
.,~, , .
i. .
203017~
shafts open from the top remain, they resulting in a satisfactorily thin wall, possibly leaving inbetween a continuous axially aligned partition 52 which extends up into the head of the dome 34'.
The upper side of the pressing plate 24 is continued further upwards into a dome-shaped development 53 which pushes itself into the flexible bottom of the bag 2, and in the final delivery position, favors a delivery of the paste composition 1 which is substantially free of loss.
The rail guides 34 are closed at the bottom.
The features of the invention which are disclosed in the above specification, drawing and claims may be of importance for the reduction to practice of the invention both individually and in any desired combination. All features disclosed are essential to the invention. There is herewith incorporated in the disclosure of the application also the entire disclosure of the corresponding/accompanying priority ; papers (copy of the prior application).
~.' , :
~.
. .
Claims (18)
1. A device for the stepwise rack-transport of a pressing plate 24, for instance on dispensers Sp for the portioned delivery of products, for instance products of a paste-like nature, in which the pressing plate 24 moves against the displacement of a handle H which moves back into the basic position under spring load, characterized by the fact that two abutment plates I, II which rest alternately against the rack strip are associated with the pressing plate 24, said abutment plates approaching each other upon displacement of the pressing plate in opposition to spring load.
2. A device, in particular according to Claim 1, characterized by the fact that the loading of the pressing plate is obtained by the action thereon of the wall (bottom 2'') of a cartridge bag which contains a paste composition 1 as product, and is provided on its upper end with a headpiece 14 which forms on its top side the handle H and is freely displaceable with axial limitation within a tubular housing
3.
3. A device, in particular according to Claim 1, characterized by the fact that each abutment plate I, II has two diametrically opposite detent tongues 27, 28 which engage correspondingly at different heights into the tooth gaps of two facing rack strips 25, 26.
3. A device, in particular according to Claim 1, characterized by the fact that each abutment plate I, II has two diametrically opposite detent tongues 27, 28 which engage correspondingly at different heights into the tooth gaps of two facing rack strips 25, 26.
4. A device, in particular according to Claim 3, characterized by the fact that the detent tongues 27, 28 have a structure similar to the teeth of a comb, said structure extending from a vertically directed plate rim 27', 28' of the abutment plates I, II.
5. A device, in particular according to Claim 1, characterized by the fact that the upper abutment plate I
bears, via a bushing 31, a lower abutment plate II, said bushing being provided at its lower end with lift fingers 33 which engage below the lower abutment plate II and, upon displacement of the pressing plate 24, displace the lower abutment plate II in the direction towards the upper abutment plate I on the bushing 31.
bears, via a bushing 31, a lower abutment plate II, said bushing being provided at its lower end with lift fingers 33 which engage below the lower abutment plate II and, upon displacement of the pressing plate 24, displace the lower abutment plate II in the direction towards the upper abutment plate I on the bushing 31.
6. A device, in particular according to Claim 5, characterized by the fact that the lift fingers 33 are developed as double arms and the inward extending arms a are acted on by the lower end of a ram 34 of the pressing plate 24.
7. A device, in particular according to Claim 6, characterized by a snap-button-like clip attachment between the inward extending arms a of the lift fingers 33 and a pin 41 on the lower end of the ram 34.
8. A device, in particular according to Claim 5, characterized by the fact that spring elements 43 for the spreading apart of the abutment plates I, II are provided in the annular space 42 surrounding the bushing 31.
9. A device, in particular according to Claim 8, characterized by the fact that the spring elements 43 are developed as spring tongues which rise in circumferential direction and are developed on the one abutment plate.
10. A device, in particular according to Claim 5, characterized by the fact that the lift fingers 33 are developed via film hinges 35 on the lower edge of the bushing, the fingers being set back with respect to the front edge 31' of the bushing.
11. A device, in particular according to Claim 5, characterized by a lateral guidance of the lift fingers 33.
12. A device, in particular according to Claim 3, characterized by the fact that the transport unit T
consisting of pressing plate 24 and the abutment plates I, II
is turnable to an insert 4 of the tubular housing 3 having the rack strips 25, 26 in the manner that the rack strips 25, 26 swing out of the region of the detent tongues 27, 28 in order to obtain free backward movement of the transport unit T opposite the direction of blocking of the teeth into the starting position.
consisting of pressing plate 24 and the abutment plates I, II
is turnable to an insert 4 of the tubular housing 3 having the rack strips 25, 26 in the manner that the rack strips 25, 26 swing out of the region of the detent tongues 27, 28 in order to obtain free backward movement of the transport unit T opposite the direction of blocking of the teeth into the starting position.
13. A device, in particular according to Claim 12, characterized by the fact that the relative movement by turning on a turnable rim 8 on the one end of the insert 4 and the transport unit T has radially outwardly directed slide blocks which travel in rail guides 38 of the tubular housing 3 which surrounds the insert 4.
14. A device, in particular according to Claim 13, characterized by the fact that the lower abutment plate II
forms passage openings 37 for the lift fingers 33 of the upper abutment plate I, this for the bayonet closure-like mounting of the two parts in such a manner that the slide blocks 40 lie in a straight line one above the other and the loosening of the bayonet-closure connection is assured by the rail guidance 38 of the slide blocks 40.
forms passage openings 37 for the lift fingers 33 of the upper abutment plate I, this for the bayonet closure-like mounting of the two parts in such a manner that the slide blocks 40 lie in a straight line one above the other and the loosening of the bayonet-closure connection is assured by the rail guidance 38 of the slide blocks 40.
15. A device, in particular according to Claim 5, characterized by the fact that the upper abutment plate 1 is provided with windows 51 which are arranged aligned with the lift fingers 33.
16. A device, in particular according to Claim 12, characterized by a locking pin 48 of the tubular housing 3, which pin grips over an end ring 30 of the insert 4.
17. A device, in particular according to Claim 16, characterized by the fact that the end ring 30 on the grip-over side 30'' has detent troughs 49 for the entrance of the locking pin 48 in the end position of rotation of the insert 4.
18. A device, in particular according to Claim 2 characterized by the fact that the headpiece 14 of the cartridge bag 2 engages on spring fingers 11 which are provided on the upper end of the insert 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3938433.0 | 1989-11-18 | ||
| DE3938433A DE3938433A1 (en) | 1989-11-18 | 1989-11-18 | DEVICE FOR STEP-BY-STEP PRODUCT APPLICATION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2030176A1 true CA2030176A1 (en) | 1991-05-19 |
Family
ID=6393828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002030176A Abandoned CA2030176A1 (en) | 1989-11-18 | 1990-11-16 | Device for the stepwise dispensing of product |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0431304A3 (en) |
| JP (1) | JPH03187872A (en) |
| CA (1) | CA2030176A1 (en) |
| DE (1) | DE3938433A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4032761A1 (en) * | 1990-10-16 | 1992-04-23 | Schuckmann Alfred Von | CARTRIDGE FOR USE IN DISPENSER |
| US5356037A (en) * | 1993-06-21 | 1994-10-18 | Pakmax, Inc. | Lift and drop ratchet stick dispenser |
| US6779664B1 (en) * | 2002-02-15 | 2004-08-24 | Ronnie J. Bermann | Device for dispensing sandwiches |
| US7874464B2 (en) * | 2006-09-07 | 2011-01-25 | L'oreal | Venting system for a product dispensing device |
| WO2009050698A2 (en) * | 2007-10-18 | 2009-04-23 | Meir Gitlis | A tube-dispenser |
| US20240067439A1 (en) * | 2021-03-04 | 2024-02-29 | Nypro Inc. | Dispenser Applicator Packaging |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3781830D1 (en) * | 1986-05-31 | 1992-10-29 | Pohl Gmbh & Co Kg | DISPENSER FOR PORTIONED SINGLE OUTPUT OF PASTE OR THE LIKE. |
| BR8807067A (en) * | 1987-05-20 | 1989-10-17 | Colgate Palmolive Co | DISTRIBUTOR OF MATERIALS IN PUMP FORM AND PUMP DIAPHRAGM |
-
1989
- 1989-11-18 DE DE3938433A patent/DE3938433A1/en not_active Withdrawn
-
1990
- 1990-10-27 EP EP19900120639 patent/EP0431304A3/en not_active Withdrawn
- 1990-11-16 JP JP2308969A patent/JPH03187872A/en active Pending
- 1990-11-16 CA CA002030176A patent/CA2030176A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE3938433A1 (en) | 1991-05-23 |
| EP0431304A3 (en) | 1992-04-08 |
| EP0431304A2 (en) | 1991-06-12 |
| JPH03187872A (en) | 1991-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1259285A (en) | Dispenser for the individual dispensing in portions of tablets, pastes or the like | |
| EP0858271B1 (en) | Dispensing package | |
| JPH0375228B2 (en) | ||
| US5052592A (en) | Dispenser for paste compositions | |
| US5000356A (en) | Swivel-up type dispensing package | |
| US4776496A (en) | Dispenser of generic paste products and specifically toothpaste | |
| EP0330929A2 (en) | Dispensing device | |
| US4742940A (en) | Dispenser for flowable materials | |
| WO1994009681A1 (en) | Paste dispensing brush | |
| BR0108262B1 (en) | ACTUATOR MECHANISM FOR AN AEROSOL HAND CONTAINER | |
| US4332497A (en) | Combination toothbrush and toothpaste dispenser | |
| JPH10502545A (en) | Cosmetic container | |
| EP0312165A2 (en) | Swivel-up type dispensing package | |
| US4886186A (en) | Paste dispenser | |
| US4522317A (en) | Dosage dispenser device for a viscous product | |
| JP2005538002A (en) | Dispenser for liquid or pasty products | |
| CA2030176A1 (en) | Device for the stepwise dispensing of product | |
| US4487341A (en) | Dispenser for dispensing creams and especially self-foaming gels | |
| US4708270A (en) | Dripless syringe | |
| CA1085793A (en) | Universal, sequential pump dispensing system | |
| EP0409594A1 (en) | Toothbrush with toothpaste dispenser | |
| EP0212437A2 (en) | Improvements in dispensers for flowable compositions | |
| CA2570239C (en) | Spout assembly for a replaceable fluid reservoir used in personal care appliances | |
| DK168652B1 (en) | Container-shaped dispenser for materials in solid or semi-solid pin or rod form | |
| CZ45094A3 (en) | Varnish applicator with a feeding stopper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |