CA2032128A1

CA2032128A1 - Dispenser for delivering pasty compounds

Info

Publication number: CA2032128A1
Application number: CA002032128A
Authority: CA
Inventors: Alfred Von Schuckmann
Original assignee: Individual
Current assignee: Procter and Gamble Co
Priority date: 1989-12-21
Filing date: 1990-12-12
Publication date: 1991-06-22
Also published as: KR910011624A; AU6819890A; DE4028930A1; EP0434326A1; JPH04173572A

Abstract

Dispenser for delivering pasty compounds Abstract A dispenser for delivering a pasty compound (3) comprises a tubular housing (1) and a plug-in cartridge (2) associated therewith in an axially displaceable fashion, the section (1') of the cartridge that projects beyond one end of the housing having an actuating surface (4) and the delivery mouthpiece (6). A plunger (9) is moved stepwise in the direction of the mouthpiece upon actuation. The advance of the plunger, which is guided by the plug-in cartridge, is achieved by means of displacement of said cartridge against a support plate (10) of the housing, which plate is resettable in the direction of the delivery mouthpiece. The resetting may be achieved by means of a locking connection (80/81) between the plunger and the support plate, the latter being seated on a column (5) that is extensible, the column being constituted by parts that can be telescoped with respect to one another.

Description

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Dispenser for deliverinq_e~stY compounds Field of the invention The invention relates to a dispenser for delivering pasty compounds, comprising a tubular housing, an insert S assigned thereto in an axially di~placeable fashion, of which the section projecting beyond one housing end has an actuating 6urface and the delivery mouthpiece, and comprising a plunger moving 6tepwise in the direction of the mouthpiece upon being actuated.
Backqround to the inyention A dispenser of this type is known ~rom EP~A-0,248,278.
There, the insert consists of a bag containing the pasty compound. In order to achieve a non-deformable actuating surface, the section projecting beyond the housing end there is covered by a cap-shaped actuating button, which is mounted peripherally in a one-armed fashion. The piston is reset with each actuating stroke. For this purpose, said piston cooperates with two pairs of serrated slats, of which one is realised as a pair of transport serrated slats and the other is realised as a pair of support slats. The latter is integrally formed on the inside of the housing.
The construction is relatively complicated, and changing the collapsible bag, which is formed from foil, is disadvantageous.
It is an object of the present invention to improve the construction and manipulation of a dispensar according to the generic type.
summarY o~ the invent on l`he present invention provides a dispenser for delivering pasty compounds, comprising a tubular housing, an insert associated therewith in an axially displaceable fashion, of which the section projecting beyond the end of the housing includes an actuating surface and the delivery mouthpiece, and comprising a plunger (which term includes a piston) moving gradually or stepwise in the direction of khe mouthpiece upon being actuated, characterized in that the insert is configured as a plug-in cartridge guiding the plunger and the advance of the plunger is achieved by means , ' ., ``: ` " , ' .

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of displacement o~ the plug-~n cartridge against a support plate of the housing tha~ is adjustable or resettable in the diraction o~ the delivery mouthpiece.
The expression 'pasty co~pound~ herein covers pasty substances in general, e~g. pasty co~posltions or masses for instance toothpastes and the like.
Description of preferred ~mbodiments A dispenser of the generic type of increased utility value is achieved as a result of the invention: in this regard, the advantage resides above all in the simple construction as well as in the ease of manipulation. To be precise, it is proposed for this purpose that the insert is configured as a plug-in cartridge guiding the plunger and the advance of the plunger is achieved by means of displacement of the plug~in cartridge against support means, particularly a support plate of the housing, resettable in the direction of the mouthpiece. The ejection thus takes place not from the level of a column in a collapsible bag, but via a hard component. Such a component can, ~oreover, also be better inserted into the dispenser. Moreover, there is no need for the additional actuating cap, since the plug-in cartridge itself possesses sufficient natural stiffness or inherent strength in the region of the delivery or discharge mouthpiece. Again, special hinging i8 eliminated.
25The pressing out or discharge of the pasty compound takes place against the plunger, which is held by an adjustable or resettable abutment; the tubular plug-in cartridge thus runs over the plunger it incorporates, which is not adjusted or reset here with each actuating step, but always adv2nces in sizeable steps or jumps. The corresponding stroke can thus be used as a way of subdividing for a plurality o~ delivery portions. Not until then does the support plate move up. A threaded resetting ~` or adjustment of the support plate proves to be advantageous here. Because of the prevailing frictional relationships, ``~ its thread need not even be 50 ~latly rising (i.e. have such a flat pitch) that it is located in the self-locking region.
In this regard, particular advantage is seen in an .~

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2~32~28 embodiment wherein the resetting thread is ~ormed by a telescopic thread, the telescopic section o~ which carries the support plate, which is rotationally locked or secured against torsion both in the housing and in the plug-in : 5 cartridge, and the telescopic drive ~ection of which is connected to a rotary manipula~or or handle at the lower end of the housing. 5uch a telescopic thread has the advantage of a ~articularly space-saving cons~ruction, so that in terms of volume the corresponding resetting mecbanism requires very little space.
- Providing the rotary manipulator at the lower end of the housing meets the corresponding psychological expectations of the user. In addition, it means that the entire housing body is available as a holding manipulator.
In accordance with the customary mode of rotation to the right, the resetting thread generally has a le~t-hand ~ thread. ~he rotary manipulator is preferably configured 2S
: a cap clipped onto the lower housing end. Given a reversible clip or clip-lock design, it is possible, for example for cleaning purposes, ~or the mechanism to be conveniently moved ~released) and reassigned (reattached).
~; However, this also has other advantages of a technical `~ production nature to the extent that different component parts are possible, for example with respect to the thread lead or pitch. Furthermore, it proves to be advantageous that the cap base possesses a swivelling or swing-out crank arm. It is possible in this way for the support plate which i~ gradually adjusted or reset stepwise via the rotary manipulator to be returned easily in one go via the crank without always reapplying one's hand. Moreover, it is favourable that the crank arm is configured as a disc (or disc-type) arm. Such a disc forms a neat termination of the dispenser on the base side, and also creates balanced ~ ~ conditions for standing the dispenser erect. If it is ~ ~ 35 arranyed that the disc arm has a manipulation aperture or ::~ grip opening, that is to say a hole, this disc can be rotated about its swivelling axis like a dial, which swivelling axis is advantageously diametrically opposite the :
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manipulation aperture. Naturally, it is ~ensible with regard to the swivelling axis to choo~e as peripheral a position as possible, doing so in the interest o~ the use of as large a lever arm as possible ~or ~uch a disc arm.
With regard to the mechanism it proves to be advantaqeous that in order to form a rotary lock in the housing, the support plate possesses at least one resilient tongue, to which a stop shoulder extending on the housing inner wall in the longitudinal direction is assigned. Such a mechaniral rotary lock or security against torsion is also already substantially assisted by the prevailing frictional forces between the plug-in cartridge and khe housing. ThP
corresponding embodiment is optimized by a plurality of tongues and stop shoulders arranged in an angularly symmetric fashion. Such stop shoulders can be taken into account on the tubular housing along with other things as early as during production. The necessary rotary lock between support plate and plunger is provided by form-locking or positive engagement on the underside of the plunger with respect to the plug-in cartridge. Such a rotary lock with respect to the underside of the plunger is formed by a toothed rim or crown on the support side of the ~upport plate. Moreovex, such teeth have the advantage of stiffening the support plate which, on the other hand, can in turn be configured with very thin walls. It is favourable if the teeth of the toothed rim possess locating bevels, and the plunger is fitted with individual receiving compartments for the teeth. The result is a type of claw coupling between the two components to be rotationally locked. In order to be able as far as possible to dispense with any frictionally gripping assignment ~f the plug-in cartridge, a favourable embodiment is achieved by means of rotary lock of the plug-in cartridge with respect to the ` ~ housing. This rotary lock of the plug-in cartridge with respect to the housing can be achieved by a slot/rib - engagement orientated in the longitudinal directlon of the housing. With such a design the advantage of a stroke limitation can be achieved by providing that the plug-in ~. :
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cartridge carries a rib on its circu~ferential surface, and the housing has a slot which is open towards th~ upper end rim or leading edge ~nd extends at least over the stroke travel. Such an embodi~ent can be developed still further 5 to form an axial security, simply by means of a lock between the rib and slot in the outwardly directed basic or initial position of the plug-in cartridge. Like the insertion of a : fresh plug-in cartridge, the removal of ~he evacuated (emptied) plug-in cartridge takes place only by intentionally overriding the said lock. Finally, the ', ..
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lock~ng then further forms a type of o~erload protection if, acting in an insufficiently sensitive fashion, the ~ser continues to crank beyond the region that exceeds the projection of the upper car~ridge end and is defined 5 by a palpable stop.
An advantageous alternative proposal consists in that the resetting of the ~upport plate is achieved from a locking connection between ~he plunger and the support plate ~eated on a column extendable in the axial direc-tion. During the delivery actua~ion, whi~h takes placestepwise, the plunger thus docked onto ~he column carries along the col~mn supporting the plunger, also doing so stepwise and extending said column. Thusl the opera-tionally normal manipulation o~ the customary dispenser obtains, except that the ejection now takes place rom a plu~-in cartridge. The locking connection ean be undone when the column is fully extended. It proves to be advantageous that the column con~ists of a plurality of part~ that can be extended telescopically with respect to one another and are ratchet-secured. In this variant too, the corresponding telescopic construction provides the benefit of as large a storage space as possible by comparison with only a relatively small proportion for the dispenser mechanism. With re~ard to the ready-to-deliver position of the dispenser mechanism, which nowobtains here at each actuating step, it proves to be advantageous that a sprung foot ring that moves the plug-in cartridge back to the baqic position in each case i5 assigned to the foot of the column. Since the empty weight and the filled content of the plug-in cartridge contribute to facilitat~ actuation depending upon the state of use of the dispenser, the spring effecting the resetting can be designed correQpondingly stronger, so that the resetting of the plug-in cartridge remains guaranteed in each ca3e. Moreover, it is favourable that the parts of the column can be returned into the Vnr: 17?_857 N 20 ?03_ Dr.R./P./H~ 2~1 02.~L~90 - ~ - ' .. . ..

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~hortened column length by a crank drivs. Thus, here only one way, to be preci e the way back, i5 covered by a crank movement, since the way out for achieving the extended column length is executed through the carrying alony by means of the plungerO ~oreover, it i proposed that the crank drive is axranged cove~ed at the lower end of the di~penser housing. The customary basic construc-tion of the dispenser, which ha~ a pleaqing exterior and is mostly ~lim, is thus retained. ~ foolproof construc-tion is achieved by means of an overload protec~ion inthe crank drive. Furthermore, it is preferred that the telescopic movement of the parts of the column be achieved by a threaded engagement of these parts with one another in con~unction with rota~y locking of the part of the column adjacent to the plunger. In thi~ arrangement, a very steep thread can be chosen which need not even be located in the self-locking r~gion. ~he column can be returned into its shortened column leng~h correspondingly quicker. The left-hand thread obtains. It is expedient to construct the internal thread for the threaded engagement on resilient tongues of the parts forming the column, the resilient avoidance capability of which tongues repre-sents th~ overload protection and provide~ the above-mentioned ratchet function. With regard to these parts, it is sufficient to make use of plastic material having the appropriate restoring property. The tongues may be simply produced by lugs cut free in the wall of the cylindrical parts forming the column`. In this case, such axial slots run out from the end of each part directed towards the plunger apart from the upper end part near the plunger. In practical terms, the rotary lock exists by virtue of a tongue, which is directed radially out-wards from the said part of the column, i.e. that near the plunger, and is in form-locking longitudinal engage-ment with respect to the housing inner wall on at leastone side. Furthermore, it is proposed that the locking Vnr: 177 857 N 20_203 Dr.R./P./Ho 21.02.1990 , .
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connection between the plunger and support plate iB
realised as a pushbu~ton connection between a male part of the support plate and a female cavity o f the plunger.
The position occupied by ~ha male part in the basic S position with ~hortened length is such that given opera-tionally correct assignment of the plug-in cartridge the appropriate docking on i3 reliably and necessarily brought about. An advantageou~ foolproof assignment can hold in that, for example, a slip-on protec~ive cap brings about ~he final position by being appropriately applied to the cartridge head. Furthermore~ it is favour-able that the foot ring is rotationally locked by being form-locked with respect to the housing wall. A practi-cally reliable assignment of the plug-in cartridge i~
further produced by a clip-shaped undergrip between the rim of the plug-in cartridge and the housing inner wall in the basic position of the plug-in cartridge. The appropriate longitudinal engagement is achieved in an advantageous way by means of a longitudinal rib of the housing wall, which longitudinal rib merges at the lower end just above the foot ring into a radially projecting protuberance that serves the rim of the plug-in cartridge as an undergrip. It is expedient for there to be located on the housing inner wall two longitudinal ribs diametri-cally opposite one another, or also three thereof, so that a balanced, vibration-free guidance of the plug-in cartridge in the housing obtains. The protuberances possess a structure that can be overridden, but an inten-tional tensile force is required in order for the plug-in cartridge that can be gripped at the projecting head end to be moved out of its assigned po3ition or to be brought into the ~ame. ~oreover, there is an advant-; ageous proposal consisting in that the crank drive is formed by a ratchet disc having a fold-out crank arm.
- 35 Finally, an advantageous design is achieved by means o~
two resilient tongues bent in oppo~ite directions as a Vnr: 177 857 _ N 20 203 Dr.R./P.~Ho 21.02.1990 . .

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rotary lock for ~he part of the column that carries them.
In conclusion, a favourabl2 proposal consist in different lead angles of ~he threads, with the highest degree of lead at the end of the column relatively remote from the cranX. The rise i~ identical ~tepwise The aDove-~escribed invention is explained in more detail below with reference to two illustra~ive embodimen~s depicted in the drawings, wherein:
Fig. 1 shows a vertical 6ection of the dispenser constructed according to the invention with an inserted plug~in cartridge, to be precise in the ba~ic position of use, still sealed by a protecti~e cap, in accordance with the first illustrative embodiment;
lS Fig. 2 ~hows the dispenser with protective cap removed, to be precise in the ~ame mode of representation;
Fig. 3 shows the dispenser subsequent ~o the carrying out of a complete actuating stroke of the plug-in cartridge, likewise in section;
Fig. 4 shows the resetting of the ~upport plate Dy one step via a rotary manipulator on the base side;
Fig. 5 shows the dispen~er, illu~trating the almost completely extended first stage of the tele-scopic thread;
Fig. 6 shows the upper ~ection of ~he dispenser in sid~ view, represanting the rotary lock between the plug-in ~artridge and housing; and : Fig. 7 6hows a bottom view of Fig. 3, with the hand crank of the xotary manipulator swivelled out.
Fig. 8 show~ the dl penser in accordance with the : second illustrative embodiment, to be preci e in a side view, sealed by a protectlve cap ;
~ig. 9 show~ the a~sociated plug-in cartridge in a reproduction on it~ own with the delivery mouthpiece sealed by a plug;

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_ 10_ Fig. lD 6how~ the bot~om view of the plus~-in cartrldge looking toward~ the plunger of the plug-in cartridge, which simultaneou31y form8 a cover on the ba~e side;
Fig. 11 shows a longitudinal ~ection of the di~penser with partly broken open plug-in cartridge, representing the baxic position of the dis-pen~er mechanism;
Fig. 12 shows a representation corresponding ~o Fig.
11~ but in ~Lhe actuating position, ~ig. 13 shows the dispenser with the column completely extended and the crank arm folded out for the purpose of retrac~ing, i.e. shortening the len~th, of said column;
Fig. 14 shows the associated bottom view, but with the crank arm folded in, and with the crank arm f olded out, as reproduced with dashed and dotted lines;
Fig. 15 shows a cross-section of the disp~nser, to be precise looking onto the ~upport plate (without plug-in cartridge);
Fig. 16 shows the section in accordance with the line XVI-XVI in Fig. 13, in an enlar~ed reproduc-tion; and Fig. 17 shows the section in accordance with the line XVII-XVII in Fig. 16.
The dispenser Sp depicted in the first illustra-tive embodiment comprises a tubular housing 1, which accommodates as an inserted part a plug-in cartridge 2 that is accessible for actuation. The plug-in cartridge : 2 contain~ the pasty compound 3 to be deli~ered.
: The accessibility for actuation results from the pro~ection on th~ upper ~lde of the ~ection 2 ' at that location of the plug-in cartridge 2. ~he ext~nt of 3~ pro~ection i~ danoted by x, and dafined by a top, forming ~` an actuating surface 4, of the plug-in cartridge 2 and Vnr: 177 B57 _ N 20 203 Dr~R.~P.. /Ho_ _ 21.02.1990 .
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the upper end rim 5 of the hou~ing end 1' at that loca-tion of the hou~ing 1.
The actuating surface 4 falls away outwards to the right a~ a relatively acute angle, and merges on the left-hand ide into a delivery mouthpiece 6. In the original state, the lstter ends in a closed cutting tip 7 with a predetermined cutting orientation edge 8. The latter extend~ in the direction opposite ~o the slope of the cartridge top or actuating ~urface 4.
The lower termination, on the base side, of the plug-in cartridge 2 forms a plunger 9. This is a pot-shaped structure with axially spaced lips 9', 9". A
puncture diaphragm (not xepresented in more detail) can be provided at the back of the plunger 9 for the purpose of he~metically safeguarding the product.
By exerting a pressure in the direction of the arrow P, the plug-in cartridge 2 i8 displaced relative to the plunger 9 supported fixed in the dispenser Sp; the cartridge shell runs over the plunger in the direction of the arrow y.
The plunger 9 itself encounters it~ abutment on a support plate 10 of a resetting mechanism 11. Thus, the advance of the plunger 9 is effected by displacinq the :~ plug-in cartridge 2 against the support plate 10 of the resetting mechanism 11, which support plate can be reset stepwise in the direction of the delivery mouthpiece 6.
`~ The resetting of the support plate 10 takes place via a thread. The latter ic denoted ~hroughout as the resetting thread G. In order to keep the proportion of the axial length of the resetting mechanism a~ small as , possible with respect to the useful space of the dis--~ penser Sp, use i5 made of a tele~copic thread con~isting ~`~` of a telescopic terminal 6ection 12 acting directly on the plunger 9, two tele~copic intermediate sections 13, 14 and an external telescopic drive section 15. The tele-~copic intermediate ections 13, 14 and the telescopic .
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drive section 15 are of the same axial length, while the internal telescopic ~erminal ection 12 pro~ects ~omewhat beyond ~he remainder of the threaded apindle package in the axial direction in ~he basic position in accordance with Fig. 1. It is rooted in the centre of the support plate 10, which is assigned rotationally locXed both in the housing 1 and in the plug~in cartridse 2.
The telescopic tenminal section 12 is also of a - ~ubular configuration, and is thus perforated over if S
entire length.
At leas~ one resilient tongue 16 set radially outwards is provided to lock the support plate 10 rota-tionally in the housing 1~ ~he drawing shows two tongues 16 mounted diametrically opposite one another and direc ted away from the rim of the plate 10. With regard to a ~alanced support, a tripartite division would also be sensible, although in the case of ~he chosen cylindrical, tubular construction of the housing 1 an effect favour-able in terms of force also proceeds via two tongues 16 diametrically opposite one another. ~he free end of the tongues 16, which fall away outwards at an acute-angled slope is bent away in a parallel alignment with respect to the corresponding housing inner wall 17, 80 ~hat an abrasion-free guidance results, in particular no hooking together takes place when the telescopic section is retracted. It would even be sensi~le to chamfer the outer edge. The sloping qections of the tongues 16 are aligned on the longitudinal central axis z-z of the disp~nser.
They converge towards the plunger 9. The rotationally locked counterpart of the housing consists of at least one stop shoulder 18, In this regard, as well, care is taken to provide a multiplicity of ~top ~houlder~ 18 arranged in an angularly ~ymmetric fa~hion, 80 that each tongue lh encounters a shoulder 18.
In practical term~, these stop shoulders 18 are narrow ribs which are integrally formed and extend ~`
Vnr: 177 857 M 20 203 Dr.R./P./Ho 21.02.1990 ., - ; ' ~.: .
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~ 13 -longitudinally along the housing inner wall 17 and thus pro~ect radially over the cylindrical inner wall, being directed inward~. They point to the longitudinal central axis z-z. On the base side, that i8 to ~y on the end diverted from the delivery mouthpiece 6, the ribs forming the ~top shoulders taper off ~n a wedge, while above they merge into an inwardly directed annular collar 20, which somewhat exceed~ the wall thickness of the housing l there and defines the minimum inside diameter of the housing 1. The flank of said annular collar diracted towards the eartridge side forms the immediate guide surface in con~unction with the crest of the ribs forming the stop shoulders 18.
The support plate 10 is rotationally locked by form-locking engagement on the underside of the plunger 9 with respect to the plug-in cartridge 2. This is a type of claw coupling. For this purpose~ a toothed rim 21 extends from the top side of the support plate 10 con-centrically with respect to the plate rim, but offset inwards thereto. This i8 an annular wall, halfway up which the teeth 22 of the ~oothed rim 21 start upwards.
The rotationally locking driving engagement on the piston 9 is fo~med o~ the underside of the latter by individual receiving compartments 23 for the said teeth 22. In this arrangement, the dividing walls 24, which form the individual compartments 23, are axially orientated and form a type of lattice are supported with their down-wardly directed end faces 24', where they define the actual axial support plane. They reach into the gaps ; 30 between the teeth 22 and bear on the corresponding horizontal tooth base. As may be seen from the drawings, ~` th~ teeth 22 have a saw-tooth profile~ i.e. they have a locating bevel 22~, which are all locaked on the same ~` side of the teeth.
The other, lower end of the telescapic thread, more precisely the telescopic drive ~ection 15, is Vnr: 177 857 _ N 2 Q203 Dr.R./P./Ho 21.02.1990 - . :

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2~2~'~8 connec~ed to a rotary manipula~or 25. T~e latter is located at the lower end 1" of the housing 1.
The rotary manipulator 25 is conigured as a cap clipped onto the lower housing end. A horizontally aligned, continuous or interrupted clipping rib 26, which pro~ec~s into a corresponding, bu~ continuous clipping groovs 27, i located on the inside of the cap space in the vicinity of the upper ~ap rim. The clipping rib 26 and clipping groo~e 27 ara located in a horizontal plane :~ 10 so that there is no load duriny turning. A rotary drive results in relation to the ad~oîning tPlescopic drive section 15. Here, too, a clipping point 28 can be useful, it being possible for a tooth system located in the longitudinal direction of the dispenser to engage between the two parts in order to achieve the rotary lock.
In this regard, the connecting zone is produced by a plug in collar 29, which i3 integrally formed on the : cap base 25~ of the rotary manipulator 25 and grips the end of the telescopic drive ~ection 15 there in a form-locking fashion.
The circumferential wall of the cap forming the rotary manipulator 25 has longitudinal serrations 25ll to enhance the grip for the purpose of actuating the xeset-ting mechanism 11.
Ovex and above this direct application of rota-tion, one that is more favourable as a lever, above all for rapid return cranking of the support plate 10, consists in that a swivelling crank anm 30 is mounted on the cap base 25' on the underside. In the position when not in use, said crank arm disappears in ~he cross-sectional contour of the cap, to be precise in a receptor 32 partially walled around by a standing rim 31 of the cap. The standing rim is interrupted only to the extent ~: that it permits th2 free ~wivelling of the crank arm 30.
The fact that the underside of the crank arm 30 is flush in the same plane with the surface on which the standing '' ~`

~ Vnrs 177 B57 N 20 203 . Dr.R /P.lHo 21.Q2.1990 .
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.' , ' 2~3211 28 rim 31 i8 put down guarantees that the di~pen~er Sp, which is capable of being ~et aside erect, is put down reliably.
In practical terms, the crank arm 30 is realised 5as a disc arm, this being done with the use of the contour size predetermined by the CAp. The disc arm, which is basically of a circular configuration; pos3esses a decentral manipulation aperture 33. The inside diameter thereof corresponds approxima~ely to the radiu~ of the 10disc arm, but does not intersect the periphery of the disc. The manipulation aperture 33 i~ diametrically opposite a swivel axis 34 of the crank arm 30. The swivel axis is located as near as possible to the wall of the housing 1, so that it is possible to u~e as large as 15possible a lever arm length for the crank arm. In the folded-out position (cf. Fiy. 6~, the rim of the crank arm 30 comes against a rotary drive stop 35 of the standing rim 31 of the cap-shaped rotary manipulator 25.
A circumferential standing rim length of more 20than 180 remains between the stop 35 and a drive-in opening edge 36 of the standing rim 31.
The inside diameter of the circular manipulation aperture 33 corresponds at least to that of the index finger of person's operating hand.
~5The swivel axis 34 extends in space parallel to the longitudinal central axis z-z of the dispenser.
With regard ~o the right-handedne~s of the mode of actuation of the crank arm 30l use i~ made of a left-hand thread for the telescopic thread, to put it more 30precisely for the resetting thread &. The thread lead is in the self-lockin~ region.
A xotary lock is also implemented between ~he housing 1 of the dispenser Sp and the plug-in cartridge 2. This rotary lock of the plug~in cartridge 2 with 35respect to the hou~ing l is achieved by means of a slot/rib engagement orientated in the longitudinal :
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direction of tha housing 1.
For this purpose, the plug-in cartridge 2 has a rib 37 on its cireumferential surface in the region of ~he section 2'. Said rib projects, directed radially 5 outwards, into a corresponding longi~udinally orientated slot 38 of the housing 1~ The length of this slot takes account of the maximum stroke travel H of the dispenser head K.
This slot/rib engagement i8 employed in order to construct a reversible locking connection between the housing 1 and th~ plug-in cartridge 2. For the purpose of locking, the slot 38 reacheq as far as the upper end rim 5 of the housing 1, that i5 to say it opens outwards. Two locking cams 39 standing out from the slot flanks of the slot 38 are located in front of the outlet. Said locXing cams engage behind a locking head 40, which projects beyond the thickne~s of the rib 37 measured in the circumferential direction of rib 37. Locating bevels 41, which delimit a funnel-shaped inlet opening, are situated in front of the locking cams 3g, which constrict the slot width. The locking point against separation of the two parts, that is to say the housing 1 plus plug-in cart-ridge 2, between the rib 37 and slot 38 is the upper end zone of the 510t 38. The delimitation in the inward direction is defined by the lower slot base 38~ which is transversely rounded.
The function and mode of operation of the dis-pen~er are as follows: by exercising a compre sive force in the direction of arrow P on the actuating surface 4 :f the plug-in cartridge 2, the latter is displaced axially in the direction of the arrow y in the housing 1. Since in this proce6s the plunger 9 is held fixed via the support plate 10, the reduction in the volume of the plug-in cartr$dge 2 that takes place brings about the discharge o~ the pasty compound 3 via the deliv~ry mouthpiece 6. The ~orrespondlng actuation can take place Vnr: 177 857 N 20 203 Dr.R~/p.JHo 21.02.1990 , ::
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with complete pa sage of ~he s~roke travel H, which, seen in the axial direction, corresponds to the extent of the projection x, or instead by means of stepwise depression the pas~age can take place correspondingly in stages. ~he compound 3 (af~er prior removal of the cutting tip 7 and, of couxse, removal of a protective cap 42 covering the dispenser head K) emerges in strands.
If, now, the dispenser is ~o be condi~ioned for a second stroke ~ravel, all that $s required is for ~he manipulator 25 to be turned clockwise, in order once again to move the plug-in cartridge 2 from the pressed-in position into the pro~ecting position in accordance with Fig. 4. This final position is defined by the locXin~ cam~ 39. In this process, the plunger 9 and, correspondinyly, al~-o the support plate 10 i5 displaced by the stroke travel H on the mouthpiece side. A new actuation of the dispenser can be carxied out. Thus, via the resetting mechanism 11 the support plate 10 is gradually displaced to successively new levels with the extension of the telescopic thread. The rotary drive of the plug-in cartridge 2 or plunger 9 is prevented for the reasons explained, so that an operationally correct extension results.
After the complete evacuation of the plug-in cartridge 2, the latt~r needs only to be removed by overriding ~he locking position, and this can easily be done by gripping the section 2~. In this regard, this section can even be roughened in order to increase the grip. The idea here is to have ribs or serrations that are orientated approxlmately horizontal. The telescopic thread may be cranked back before or after by means of the crank arm 30, so that the exchange cartridge, which is plugged in from above a~ with a ~'muzzle-loader" runs properly guided on the support 10, and this occurs with the implementa~ion of the coupling, described above in detail, via the toothed rLm 21.

Vnr: 177 857 N 20 203 Dr.R./P./Ho _ 21.02.1990 . ~ , ':, ~

2~32~ 28 _ 18 -In the case of the resilient tongues 16 tha~
entered the pluy-in ~artridge ~, there i~ likewise no rotary movement for the plunger and the suppor~ plate, because of ~he static friction between the plunger 9 and the inner wall of the plug-in cartridge 2, which for its part i~, after all, rota~ionally locked.
The particular extension length of the ~elescopic sections is limited by the small collars or annular shoulders 43 pro~ecting beyond the thread.
The dispenser Sp depicted in the second illustra-tive embodLment comprises a tubular housing 1, which accommodates as an inserted part a plug-in cartridge 2 accessible for actua~ion. The plug-in car~ridge 2 con-tains the pasty ~ompound 3 to be delivered.
lS The accessibility for actuation results from the projection on the upper side of the ~ection 2~ at that location of the plug-in cartridge 2. The extent of the projection is denoted by x, and defined by the top, forming an actuating surface 4, of the plug-in cartridge 2 and the upper end rim 5 of the housing end 1~ there of the housing 1.
The actuating surface 4 falls away outwards to the right at a relatively acute angle, and merges on the left-hand side into a delivery mouthpiece 6. The latter is sealed by a removable plug 44 (cf. Fig. 9).
A plunger 9 forms the lower termination, on the base side, of the plug-in cartridge 2. Said plunger i~ 2 pot-shaped structure with axially spaced lip5 9 ', 9 " .
By exerting a pressure in the direction of arrow P, the plug-in cartridga 2 i~ displaced relative to the plunger 9, which i8 supported fixed in the dispenser in each case. In this process, the cartridge shell runs over the plunger 9 in the direction of the arrow y.
The plunger 9 encounters an abutment on a support plate 10 of a resetting mechanism 11. The ad~ance of the plunger 9 is thus effected by displacement of the plug-Vnr: 177 857 N 20_203 Dr.R./P.LH~ 21.02.1990 , , ~ . . ,~

.
... : .
,.. . . . .
' ` `:: ~ ' , ' 2~32~2~

in cartrid~e 2 against the support platP 10 of the resetting mechanism 11, which support plate i~ reset stepwise in the direc~ion of tha delivery mouthpiece 6.
The resetting of the support plate lO results from a locking connec~ion between the plunger 9 and the ~upport plate 10 that is seated on a column S capable of being exte~ded in the axial direction. The column S
consist~ of a plurality of parts 45, 46/ 47 and 4B that can be extended ~ele~copically with respect ~o one another. The said parts are o~ relatively short axial length, so ~hat the proportion of the length of the xesetting mechanism 11 is held as small as possible overall with respect to the useful space of the dispenser Sp. The circumferential wall of the basically cylindrical parts 45 to 47 has an external threads G'. These are threads with a structure of saw-tooth type (cf. Fig. 17), one flank 49' of the thread 49 being aligned perpen-dicular to the longitudinal central axis z-z of the dispenser Sp, while the other thread flank 49" extends at an acute angle hereto. These thread flanks converge towards the dispenser head R. The threads 49 are multiple-threaded, and have different lead angles from one part to another. The lead angle of the part 45, which is located nearer the dispenser head ~ and has the smaller diameter, i5 10, that of the part 46 embracing the latter is 8 and that of part 47 embracing the latter is 6~.
The threads of the matching internal thread, which are located inside the overreaching parts 46, 47, 48 are denoted by 50. Said threads also possess a saw tooth structure, but with the opposite orientation, so that a thread flank 50' obtains extending perpendicular to the longitudinal central axi~ x-x, and a thread flank 50" diverging in the opposite direction towards the headpiece K. Approx. four threads 50 are located one above another. At issue here is a multi-threaded thread.

Vnr: 1?7 8~5? N 20 203 ~ Dr.R./P.!Ho _ 21.02.1990 ~':

.: , 2~3'~2~

In ~he extended s~ate of the column S there i8 still a sufficient overlap len~th of the part~ 45 - 48, which guarantees the axial or radial stability. A com-plete extension i~ not possible, since the lower rim of the parts 45 - 47 forms a ~op collar 51 in each caqe, which comes against the thread 50 located at the very bottom.
The represented saw-tooth structure of the threads 47, 50 leads to a locking effect that prevents the shortening of ~he column S by purely axial telescop-ing of the parts 45 - 48; however, in the sense of an extension of the column S the result i8 an extension free of obstructions up to the final posltion. Each stage reached thus forms a support abutment for the support plate 10 and the plunger 9, respectively.
The corresponding ratchet effect is achieved by means of longitudinal slots 52, which extend from the upper ends of the parts 46 - 48 and terminate at the same level. Said longitudinal lot~ cut ree a wall section of the shell-shaped parts, 80 that resilient lugs 53 are present. The angular spacing of the longitudinal slots 52, which is preserved in the circumferential direction or is different, as the ca~e may be, permits the produc-tion of a more or less hard locking effect of the end overlapping regions of the parts 46 - 48, the configura-tion of which par~s resemble a crown or battlement.
The column S that ha~ been extended through being carried along via the plunger 9 can, by u~ing the engage-ment of the external thread G' in the thread 50 of the internal thread - this being a left-handed thread -, once again be returned into the shortened column length, to be precise by means of a crank drive 54. ~he latter is as igned to the lower end 1" of the hou3ing 1 of the dispenser Sp. It ~54) ha~ a crank arm 30 that can be folded radia}ly out of its concealed position. Said arm swivels about a horizontal hinging axi~ 55. Said axis Vnr:- 7? 857 N 20 203 _ Dr.R./P.~Ho 21.02.1990 , : . . .
; ~
, :

2~32~8 extends in the most peripheral direc~ion pos~ible, o that a large u~eful arm length obtains.
The crank arm 30 has a cr~nkpin 56 for the purpose of actuation. When the crank arm 30 has been brought into the final folded-out position, said pin extends outcide the dispenser cross-section parallel in space to the longitudinal central axis z z. When brought into the concealed position, the crankpin 56 is accom-modated in the central cavity 57 of the column S.
Furthermore, a so-called ratchet di~c 58 is a component of the crank drive 54. Said disc is an annular collar, integrally formed on the part 48 with the largest cross-section, which is accommodated by being guided in a matching reces~ 59 in the lower end 1" of the housing 1. As may be seen from the bottom view in ~ccordance with Fig. 14, a peripheral section o~ the said ratchet disc 58 forms a ratchet finger 60. It is produced sLmply by an angularly shaped free cut 61 and possesse3 a slight outwardly directed pretensioning. An outwardly directed locking head 62, which is integrally formed on the free end of the ratchet finger 60, coopera~es with a fixed toothed-space rLm 63, the tooth spaces of which follow in close sequence in the circumferential direction, and in which the locking head 62 engages with a locking effect.
The ratchet free cut 61 is chosen so wide that the locking head 62 can move to avoid and, in the case of left-hand rotation in the direction of the arxow F, the ratchet di~c 58 can be turned, shortening the column S.
Rotating in the opposite direction of the arrow F is, by contrast, blocked.
A~ may be ~een from Fig. 11, the free end of the crank arm 30 has a manipulation lip 65, which ~tands out ~rom the base of its ~torage recess 64 on the dispenser ~ide. Said lip may conveniently be taken up by means of a finger nail. The hinging axis 55 can produce a snap effect, 80 that the concealed position of the crank arm Vnr. 177_85? N_?0 203 ~D~r.R./P./Ho 21.02.1990 "

2 ~ 2 ~

3 0 i8 secured.
Reducing the column length, i,e. movîng back to its minLm~m axial length, requires rotary locking of the end member of the column S~ that is to say o~ the part 45 S most remote from the crank. ~hi~ rotary locking i8 realised by mean~ of a tongue 66 directed radially outwards from the ~aid part 45 of the column S. Reference is made to Fig. 15. The latter ~how~ a paired assignmen~
of tongues 66. They extend in opposite dixection~ from the central ~upport plate 10 of the resetting mechanism 11, being radially direct~d at first. ~pproximat~ly half way along their leng~h they continue in a clearly curved whip sh~pe tapering at the end. Thi~ curved sec~ion bears the reference symbol 66'. The relatively sharp curvature of the arcuate section 66' merges into a less 6trongly curved end section 66". The radius of curvature of the latter corresponds essentially to that of the cylindrical inner wall of the housing 1. The curved end section 66"
proceeds in the direction of the arrow F, and encounters its longitudinal engagement, which is form-locked on at least one side, with the housing inner wall 1''' on a longitudinal rib 67 integrally formed thereon. The free front end of the tongue~ 66 is supported on the corres-ponding side flank of the longitudinal rib 67 in a rotationally locking fashion. The ~nd sections 66" bear resiliently on the housing inner wall 1''', and disappear protectively,when the cartridge i~ assigned,into the cavity of the plug-in cartridge 2. As may be seen from the ~ame Figure named, thi~ longitudinal rib 67 is likewise provided in pairs, that i8 to say is expediently arranged in mu~ual diametrical opposition. 5aid longitu-dinal rib 67 extends from a pro~ecti~g ~houlder 68 of the upper end 1' of the hou~ing. The rib i8 po~itioned ~uch tha~ it~ inwardly directed narrow edge 68' i~ ~lush in the same plane with the cylindrical mouth 69 on the mouthpiece 5ida oP the hou~ing 1. Tha longitudinal rib or Vnr: 177 8$7 N 20 2Q3 Dr.R./P./H~ 21.02.1990 , `: :
.

2~2~28 ~3 ~
longitudinal ribs 67 can terminate below at the level of a horizon~al roof step 70 of the recess 59.
In this way, the longitudinal rib 67 can also further be used for a form-locking engagemen~ providing a rotary lock for a foot ring 71 a~ the level of ~he column package and mounted thereonO Said foot ring is seated on the circumferential wall of the part 48 of the column S with the largest cross~section, which circum-ferential wall i~ stepped approxLmately halfway up to form a shoulder. The foot ring 71 is internally turned.
In con~unction with the circumferenti~l wall of the stepped lswer part 48 and the abovementioned sh~ulder it forms a spring chamber 72. Located in aid chamber is a return spring 73, which loads the foot ring 71 in the direction of its higher position that defines the end stop.
The upper, horizontal, circumferential end rim 74 of the foot ring 71 serves as the support surface or the plug-in cartridge 2 when inserted. On he inside, and concentrically, the foot ring 71 con~inues in the direction of the head piece K of the dispenser to form a short centring pro~ection 75. The lat~er moves into the end of the cartridge shell, which is slightly expanded in a funnel-shaped fashion (cf. Fig. 113.
The lower end of the pot shaped foot ring 71, which is configured in practice like the rLm of a bell, is guided on the widened section of the cylindrical circumferential wall of the part 48 with the largest cross-section. As the plugged-in cartridge is axially displaced, the lower rim 76 of the foot ring 71 moves, delLmiting the 8top, against-the upper side, which forms an annual shoulder, of the axially ~ecured ratchet disc 58. This corresponds to the maxlmum stroke travel H of the dispenser head K.
For the purpose of incorporating the foot ring 71 in a rotationally locklng fashion, the latter ha~, for Vnr: 17? 857 N_20 203 ~ Dr.R./P./H~ 21.Q2.1990 - ~ ' ;
.

2~3~12~

its part, on the ~ide of it3 circumferential wall longi-tudinal groovcs 77, which extend continuously in the axial direction and are open toward~ ~he housing inner wall 1''' ~cf. Fig. 16).
As may further be seen from the representation of the drawing, the two longitudinal ribs 67, which form parts of the rotary lock, are developed to obtain a clip-shaped undergrip between the lower plug-in cartrid~e rLm and tha housing inner wall 1~. The point i8 that in the basic position of the plug-in cartridye 2, the said plug-in cartridge rim i5 located below two protuberances 78 ranged at the same levelc The latter pro~ect in a radial direction beyond the narrow edge 67' of the longitudinal ribs 67. These are nose-~haped pro~ection~ with locating lS bevels on both sides, which can be overridden by an intentional slipping-on movement. Thus, it is possible for the plug-in cax~xidge 2 to be axially displaced relatively easily in the interior of the housing 1, or also for the dispensex to be placed on it~ head without the plug-in cartridge 2 slipping out. The flexibility of the cartridge material opens up the advantageous possi-bility of a light resilient avoiding movement when the abovementioned protuberances 78 are overrun. The locking collar, which i~ formed on the outside of the cartridge rim and snaps below the protuberance 78, bears the reference symbol 79.
Even when the parts 45 - 48 have been moved in as far as possible, there is no danger of destruction of the resetting mechanism or backcranking device of the column S, since the crank drive 54 possesses an overload protec-tion in the form of the re~ilient lugs 53 explained above.
The locking connection between the support plate 10 and the plunger 9 of the plug in cartridge 2 to be assigned is implemanted as a pushbutton connection. For this purpo~e, the support plate 10 has a male part 80.

Vnr: 177 857 N 20 203 ~Dr.R.~P./Ho __21.02.1990 . ..

.
.. .

2~32~28 The latter is located in the centre of the ~aid support plate, so that to thi~ extenk there i~ no need to observe a special angle of position between the plug-in cartridge 2 to be as~igned and the housing 1. ~he male part 80 is configured as a cros -~lo~ted pin wi~h a head-shaped, circumferential swelling 80~. In conformity with this ~welling, the plunger 9 has a female cavity 81 with a matching undercut for the swelling 80'. The locking force~ are in conformity wi~h the maintenance of the proper operational assignment, bu~ can be overridden by intentional removal of the plug-in cartridge 2.
For functioning and mode of operation of this dispenser Sp are as follows:
~ hrough the exertion of a compressive force in the direction of the arrow P on the actuating ~urface 4 of the plug-in cartridge 2, the la~ter is displaced axially in the direction of the arrow y in the housing 1.
Since, in this process, the plunger 9 i8 held fixed over the support plate 10 by the column S, the reduction in the volume of the plug-in cartridge that occur produces the discharge of pasty compound 3 via the delivery mouthpiece 6. The corresponding actuation can take place with the complete passage o~ the stroke traval H, which, ~een in the axial direction, corresponds to the extent o 6.
~5 the pro~ection x. However, it i8 also possible, for example, for only a subsection of the ~troke travel H to be passed. The downward di~placement of the plug-in cartridge 2 takes place again~t the restoring force of the spring-loaded foot ring 71, which pushes the plug-in cartridge 2 back into its basic po~ition once again after the actuating surface 4 ha~ been rele~sed. Since the plunger 9 adheres to the level of the column of pasty compound and i8 thu~ guided with a frictional grip on the cartridge inner wall, the column S i$ carried along by being coupled ko the plunger. The column S thus creates the next higher support plane for the plunger. ~his ynr: 177 85? N 20.203 _ Dr.R.~P.~H~ 21.02.1990 ' ;' ~

~3212~

continues until the column reaches the extended final position vi~ible ~rom Fig. 13, or this ~inal position is not produced, in practical terms, until extraction of the plug-in cartridge. The male part 80 then projects somewhat beyond the upper end rim 5 of the housing 1. Any instability with reference to the observance o~ the axiality of the individual parts wi~h respect to one another is absorbed by the resilient tongues Ç6. To be precise, with their free en~s the latter also form a support element with a centring effect.
In order to condition the next position o~ readiness of the dispenser Sp, the lever arm 30 o~ the crank drive 54 is folded out, and the column S is screwed back to its minimum length. There now follows the insertion of a new plug-in cartridge 2, the plunger 9 of which automatically enters into locking connection with the support plate 10 and male part 80, respectively. The lever arm 30 is ~olded back.
The dispenser is once again ready.
For brevity, in the description of the second illustrative embodiment those elements adopted from the first illustrative embodiment have not been discussed again in the text; their arrangement and functioning will however be apparent to those skilled in the art.
Description of furt.her ~referred embodiments ~5 There has been described above a dispenser fGr delivering pasty compounds, comprising a tubular housing, an insert assigned thereto in an axially displaceable fashion, of which the section projecting beyond one housing end has an actuating surface and the delivery mouthpiece, and comprising a plunger moving stepwise in the direction of the mouthpiece upon being actuated, which insert is configured as a plug-in cartridge guiding the plunger and the advance of the plunger is achieved by means o~ displacement of the plug-in cartridge against a support plate of the housing resettable in the direction of the delivery mouthpiece and arranged on the end of a telescopic column o~ shortenable length, the support plate and plunger being in form-locking engagement with respect to one another, and a foot ring, to , ~ :
' ' ';
,,:

2~32~28 which there is assigned a return spring which moves the plug-in cartridge back into the ba~ic position.
During the stepwise delivery actuation, the plunger docked to the column carrie3 along the column, which supports the plunyer and is there~ore locked in the opposite direction with respect to ~he abutment formation, doing so equally in a ~tepwise fashion and with lengthening of the column. The column leng~h can then ~e reduced once again via a crank drive on the base ~ide, ~o ~hat a fresh cartridqe can be introduced into the housing of the dispenser, which is appropriately op~n above. The cranking back of the parts of the telescopic column, which are ratchet-secured with respect to one another, can, however, be regarded as tedious.
It would, therefore, be an advantage to facilitate the realisation of the length-shortened telescopic position, i.e. to reduce significantly the actuation time spent on the ~hortening of the column to a fraction.
This object can be achieved by arranging that the parts of the column that can be displaced telescopically with respect to one another can be telescoped in a rotation angle setting.
As a result of such a configuration, it is extremely simple operationally to effect the shortening of the column.
It becomes possible to do without the crank device used so far. The structural means are simple and expedient. In practical terms, the procedure is such that the parts of the column, which can be displaced telescopically with respect to one another, can be telescoped in a rotation angle setting. If the column - which is, as before, accessible for rotation from the ba~e o~ the dispenser and who~e upper part is rotationally locked, e.g. as described with reference to Figures 8 to 17 - is rotated in one direction/ the parts are in locking engagement; if rotation is done in the opposite direction, they come out of locking engagement. Depending upon the circumferential length of the locking engagement, in practice this does not even require a full circular rotation angle. It is advantageous .
: - . .

.. . .
.

2~3~8 in this connection that the rotation angle settings of the telescopic parts are limited by stops. Consequently, both functional settings are exactly de~ined and can be detected by the operator by means of a 6top which vir~ual~.y canno~ be exceedad. Furthermore, i~ proves ~o be advantageous that the inner wall and circum~erential wall of ~he telescopic parts are composed of ratcheting profiled parts and smooth sliding sections, which are located one after ano~her in the circumferential direction. Ratcheting profiled parts of conventional type suffice in this regard. There is no need for threaded engagement between the parts. This also leads to a simplified configuration, ' ' - , :'...... . : ., - ... . . .... , ~ . . .
, . :, . : . ~ . ': , ,. ' . . ~ . . .

2~32~ 2~

_29 -to be precise also from the point of view o~ production engineering, i.e. iniection moulding engineering. The rotary lock with respect to the housing i5 achieved via the uppermost telescopic Rart. In thi~ arrangement, ~he corresponding support is no longer tied to a direction.
Instead, the proceduxe can be such that the rotary lock is achieved by means of a resilient tongue directed radially outwards, which is in longitudinal engagement with respect to at least one longi~udinal rib of the housing inner wall, which longitudinal rib reaches as far as the upper end rLm of the housing and by means of form-locking engagemen~ in a foot ring collar of the plug-in cartridge likewise locks the latter rotationally. The longitudinal rib ~hu~ fulfils a double function. As soon as the plug-in cartridge has overrun the resilient tongue, that is to say moves out of the region of the rotary lock, the coxresponding rotary lock via the said foot ring collar obtains. A further advantageous func~ion with respect to the ro~ary lock also consists in that the rib entry cross-sections at the foo~ rins collar form an individuating index for the plug-in cartridge. It is achieved in this way that the dispenser, which is, as ~ar as the dispenser mechanism is concerned, coordinated with a cer~ain degree of pastiness, can also always be fitted only with the correct plug-in cartridges. Finally, the rotary lock is continued when the support plate possesses teeth, which pro~ect upwards in the form of a crown and engage with the plunger. Finally, a further advantageous proposal consists in that the lowermost telescopic part is continued into a rotary manipulator for changing the rotation angle setting of the other telescopic parts with respect to one another.
The above-described invention is explained in more detail below with refexence to an illustrative embodiment depicted in the drawings, wherein:

Vnr: 177 857 _ 20 417 ~ _ Dr.R./P./G 30.08.1990 . . . . . . ..
.

.... . .
' ' ' 2~3~2~

Fig. 18 shows a dispenser according to the invention in a longitudinal section representing the maximum extended l~ngth of the column, to ~e precise when the telescopic parts are locked with rPspect to one another;

Fig. 19 shows an iden~ical sectional represen~ation, but with the telescopic parts in the unlocked setting, so ~hat the col~nn can be telescoped starting from the head end;
0 Fig. 20 shows the upper section of the column reproducing the docking means on the plunger side and the means of rotary locking;

Fig. 21 shows the plug-in cartridge in a perspective individual representation;
5 Fig. 22 shows the dispenser, once again in vertical section wi~h the plug-in cartridge now assigned, to be precise in the basic position of the diKpenser mechKnism;

Fig. 23 shows the same, but in the actuated position;
0 Fig. 24 shows the section in accordance with the line VII-VII in Fig. 18;

Fig. 25 shows the section in accordance with the line VIII-VIII in Fig. 19 (both sections are substantially enlarged with respect to the raference figures); and Fig- 2~ shows ~ vertical ~ection in tha ragion of an overlap zone of two telescopic parts.

Vnr: 177 8$7 _ 20 417 Dr.R./P./G 30.08.1990 . ,. - . l, .......................... :.
. . . :
:, ,;

2~32~2~

-31 ~
The dispenser depicted comprises a tubular housing 1, which accommoda~es as an inserted part a pluy-in cartridge 2 that is accessible for actu~tion. The plug in cartridge 2 contains the pa.~ty compound 3 to be S dalivered.
The accessibility for actuation results from the projection on the upper side of the section 2' at thak location of the plug in cartridge 2. The extent of projection is denoted by x, and defined by a top, forming an actuatins ~urface ~, of the plug-in cartridge 2 and the upper end rim S of the housing end 1' at that loca-tion of the housing l.
The actuating surface 4 falls away outwards to the right at an acute angle, and merges on the left-hand side into an appropria~ely exposed delivery mouthpiece 6 which can be closed by a plug in a conventional manneri The lower termination, on the base side, of the plug-in cartridge 2 forms a plunger 9. This is a pot shaped structure with axially spaced lips 9', 9".
By exerting a pressure in the direction of the arrow P, the plug-in cartridge 2 is displaced relative to the plunger 9 supported fixed, in each case, in ~he dispenser. In this case the cartridge shell runs over the plunger 9 in the direction of the arrow y.
The plunger 9 itself encounters its abutment on a support plate 10 of a resetting mechanism llo The resetting of the support plate lO results from a locking connection between the plunger 9 and the support plate 10, which is seated above on a telescopic column S extendable in the axial direction.
The telescopic column S consists of a plurality of ~elescopic parts 45, 46, 47 and 48, which can be extended telescopically with respect to one another. The said parts, which are approximately of the ~ame length, have a relatively small axial length, so that the propor-tion of length of the resetting mechanism 11 with respect Vnr _177 857 20 41?~ }i_ ~lQ~ 990 ~ ~- - -- . . ........ . . .

-- :. : :
:, . ..

.

2~4~2~2~

_ 32_ to the useful space of the dispenser Sp as a whole is kept as low as possible.
The circumferential wall o~ ~he basically cylindrical parts 45 to 47 has toothed profiled parts 81.
These constitute a saw-tooth like structure. Engaging in these outer toothed profiled parts are too~hed profiled parts 82, which lie on the inner wall of the over-reaching telescopic parts 46, 47 and 48. These toothed profile parts 82 also con~titute a ~aw-too~h structure.
Engagement is form-locking. Reference is made to Fig. 2&, page12/18 from which the oppositely directed orientation of the saw-tooth structures clearly emerges. The teeth of the outer ~oothed profiled parts 81 have a flank 81~
which extends perpendicular to the longi~udinal central axis z-z of the dispenser Sp, while the other flank 81~
extends at an acute angle thereto. The upper flanks 81"
converge in the direction of the dispenser head K. One flank 82' of the inner toothed profiled parts 82 is locat~d, in ~urn, perpendicular to the longitudinal central axis z-z. The flanks 82" diverging in the op-posite direction with respect to the dispenser head K
extend, once again, at an acute angle. Approx. four horizontally aligned profiled teeth of the inner toothed profiled part 82 extend on the inner wall of the tele-scopic parts 46, 47, 48. The result is that in the extended state of the telescopic column S there is always a sufficient overlap length of the parts 45 to 48, which ~uarankees the axial or radial stability. Complete extension is not possible, since in each case the lower edge of the telescopic parts 45 to 47 forms a stop collar 51, which projects beyond the circumferential wall and moves against the lowermost profiled tooth of the over-reachin~ telescopic part. On the circumferential wall of the telescopic parts 45, 46 and 47 the external toothed profiled part 81 extends practically over the entire axial length of said parts.

Vnr: 1?7 857 _ _ 20 417 Dr.Fk¦P./G _ 30.08 !1990 . . - - ' ' . , ', ' ' ':
. . : : , ' .
' ' , ' ~ ' ' ., . . ' ' ~ ' ' ' " ; . ' 2~2 ~ 2~
33 _ In accordance with the toothed structure repre-sented, the extension of th0 telescopic column S takes place by means of ra~che~ing overrunning of the toothed profiled parts 81, 82 in engagement, to be precise as far S as the maximum final position. By contrast, given the described engagement by means of toothed profiled part~
no shortening of the telescopic column can be carried out because of the obtaining one-sidedly working ratchet lock, in which the horizontally aligned flanks 81~ and 82' encounter one another in a locking fashion. Each stage reached thus forms a support abutment or the support plate 10, and ~he plunger 9, respectively.
The corresponding ratchet effect is achieved by means of longitudinal slots 52, which ori~inate from the upper end of the telescopic parts 46 to 48 and end at the same level. Said slots cut wall sections of the shell-shaped parts 46 to 48 free, so that resilient lugs 53 are obtained. Such longi~udinal slots 52 are located mainly in the region of the sections of the parts 46 to 48 that have toothed profiles, and effect a final overlap region of the said parts that is configured like a crown or battlement.
The toothed profiled parts 81, 82 provided only partly by area in the circumeferential direction are used at their minimum axial length for the purpose of crank-free return of the telescopic column S, to be precise in such a way that the parts 46 to 48 of the telescopic column S that can be displaced telescopically with respect to one anothar can be telescoped in a rotation angle setting. For this purpose, the toothed profiled parts 82 arranged on the inner wall are moved out of toothed engagement to the outer toothed profiled parts 81, until they are located congruently with respect to smooth sliding sections 84 of the respective tele~copic parts 45, 46, 47. The smooth sliding sections 84 alter-nate in the circumfPrential dLrection with the toothed Vnr 177 857 2Q 417 Dr.R./P./G _ 30.08.1990 ~ ~, ,~

' 2~32~

profiled parts. For this purpo~e, for examplP, an angle of, for instance, 90 can be used, in each case, for each circumferential sector. The respective final rotation angle setting of the telescopic parts with respect to one another is lLmited by stops. ~or this purpose, a stop fingex 85 originates from the area of the inner toothed profile 82 (cf. Fig.20). This finger cooperates with a longitudinal stop edge 86, which align~ the axial-linear alignmen~ of the toothed profiled par~s 81/82. Extending on ~he other side of the smooth sliding section 84 is a longitudinal stop edge 87 whieh defines the exit from the tooth system of the toothed profiled parts 81/82.
The smooth sliding sections 84 already result in practice from omitting the exposed external toothed profiled parts 81, so that *he longi~udinal stop edges 86, 87 extending parallel to one another are in essence the front ends of the profiled teeth.
In order to promote the toothed interguidance, the so-called pawling of the toothed profiled parts 81 and 82, the profiled teeth of the inner toothed profiled part 82 can come to a point in the circumfexential direction. This leads to thread groove funnels having a yielding effect between the profiled teeth. For the purpose of reliable engagemen~ and disengagement of the tooth system, the uppermost telescopic part 45, which carries the plate 10 that represents the abutment and is virtually formed by the top of the part 45, is rotationally locked with respect to the housing 1. The rotary lock is produced by a resilient tongue 88 directed radially outwards. This is a baqic body like a transver~e yoke~ Said body extends diametrically and merges at the end into two fork-shaped guide claws 89. The latter ~re in longitudinal engagement with longitudinal ribs 67 of the housing inner wall 1''', which are likewise arranged in pairs.
When seen in profile, the resilient tongue 88 Vnr. 177 _7 ~20 417 Dr.R.~/P.~G 30.08.1990 :

2~3212~

extends essentially in the form of a trapeze, the bevels that fall away being mainly occupied by the guide claws 89. The lat~er diverge at an angle of approx. 45 and end at a distance in front of the said housing inner wall 1'''. Thus, no interlocking with an obstructing effect occurs with the housing 1. The claw mouth has 2 larger radial length than is required for ~he longitudinal engagement.
The two longitudinal ribs 67, which are diametrically opposite, reach as far as ~he upper end rim S of the housing 1. Their inner edge is chamfered.
Beneath a projection shoulder 68 provided there in the upper end 1' of the housing 1, the longitudinal rib 67 has a greater height. In the basic position, the guide claws 89 end directly below the said projection shoulder 68, which is achi~ved by a simple offset~ing of the wall, and forms on the side of the circumferential wall a horizontal stop shoulder for a protective cap (not represented in more detail).
The longitudinal ribs 67, which are advanced upwards correspondingly far, also already form at the very beginning a rotary lock for the plug-in cartridge 2 to be inserted starting from there. The means on the side of the plug-in cartridge consists of two rib entry cross-sections 90 in diametrical opposition. These rib entry cross-sections 90 are realised on a ~oot ring collar 91 constructed on the lower end of the plug-in cartridge 2.
Said foot ring collar projects correspondingly beyond the cylindrical circumferential wall of the tubular pluy-in cartridge 2. Apart from the explained rotary lock between plug-in cartridge 2 and housing 1, this measure also further provides an individuating index for the plug-in cartridges.
The rota~y lock i8 transmitted to the resetting mechanism 11 via the plunger 9, which is itself rotationally inhibited. For this purpose, the support Vnr: 177 857 20 417 _ Dr.R./P./G 30.08.1990 , . ' ' , ' ' 2~32~

_ 36 _ plate 10 has teeth 22 directed upward8 in a crown-shaped arrangem~nt, which teeth ~orm a type of toothed crown or toothed rim 21. Given optimum obs0rvance of the direction of rotary loading, the tee~h 22 can also have a saw-tooth S structure instead of, as represen~ed, being provided with a uniformly sloping flank angle. The teeth 22 are in rotationally locking engagement with respect to the receiving compartments 23 on the corresponding underside of the pot-shaped plunger 9. This engagement situation emerges particularly clearly from Fig. 5. The too~hed rim 21 can be cons~ructed directly at the plate 10 or, alternatively, on the spring tongue 88 connected therewith.
The locking connection between support plate 10 and the plunger 9 of the plug-in cartridge ~ to be assigned is implemented as a push-button connection. For this purpose, the support plate 10 has a central male part 80. It is configured in the form of a cross-slotted pin, which has a practically barrel-like basic configuration and forms a swelling 80' located halfway up. Corresponding to this swelling, the plunger 9 has a female cavity 9''~ with matching undercut for the swelling 80'. The locking forces are coordinated to preserve the operationally correct assignment, but can be overridden by intentional removal of the plug-in car~ridge 2.
The lower end of the telescopic column S, more precisely the telescopic part 48, is continued to form a rotary manipulator 92 which is accessible from outside.
The functional positions explained above, that is to say the locked plate support position of the column S and the ready-to-use position with shortened length, axe produced via said rotary manipulator. The rotary manipulator 92 on the lower end 1'' of the housing 1 is used equally to fasten the resetting mechanism 11 in the housing 1, to be precise by forming a clipping flange 93 on the rotary Vnr: 177 857 20 417 ~ c~-~Læ L~ 0-08 l99~o 2~32'~ 2~

manipula~or 92. The clipping flange 93 projects into a corresponding guide groove 94 running horizontally on the lower rim o~ the housing 1, of which the wall is strengthened and which i8 coYered there by the cap-sh~ped structure of the rotary manipulator 92 on ~he inside~
end-side and ou~side. The lower rim of the housing 1, on the one hand, and the lower end edge of the two longi-tudinal ribs 67, on the other h~nd, have the effect of limiting the plugging in for this telescopic part 48.
Furthermore, the longitudinal ribs 67 are used to produce a rotationally locking form-locking engagement for a ~oot ring 71 that can be displaced axially to the limit of ~he height of the column package. Said ring is seated on the circumferential wall of ~he part 48 with the largest cross-section of the column S, which circum-ferential wall is stepped upwards approximately halfway up forming a shoulder. The foot ring 71 is internally turned. Together with the circumferential wall of the stepped lower part 48 and the abovementioned shoulder, it forms a spring chamber 72. Located therein is a return spring 73, which loads the foot ring 71 in the direction of its higher, stop-limited position. The upper, horizontal, circumferential end rim 74 of the foot ring 71 ser~es as a support surface for inserted plug-in cartridge 2. The foot ring 71 then continues on the inside and concentrically in the direction of the head piece K vf the dispenser Sp to form a short centring projection 75. The latter moves into the end of the cartridge shell, which is slightly expanded in the form of a funnel (cf. Fig.22~. In the plugged-in statet the rim of the plug-in cartridge is located below wo protub-erances 78 arranged at the 8ame level. The latter, directed radially inwards, pro~ect beyond the narrow edge 67' of the longitudinal ribs 67~ which otherwise extends straight. These are nose-shaped pro~ections with locating bevels on both sides, which can be overridden by an Vnr: 17 ~ 0 -- ~:

-- --2~32h28 intentional slip-on movement. Thus, the plug in cartridge 2 can be displaced axially relatively easily from ~he interior o~ the housing 1, an~ the dispenser can also be stood on its head without the plug-in cartridge 2 slipping out. The flexibility of the cartridge material opens up the advantageous possibility of a light, resilient movement of avoidance during overrunning of the abovementioned protuberances 78. The locking cam (cf.
Fig.22), which is integrally formed on the cartridge rim on the outside and snaps under the protuberances 78, bears the reference symbol 79 and is sea~d on the base of the rib entry cross-section 90 (cf. also Fig.21).
The dispenser Sp functions as follows:
By exerting a compressive force in the direction of arrow P on the pro~ecting plug-in cartridge 2, the lattex is displaced in the housing l axially in the direction of the arrow y against the force of the return spring 73 in a stop-limited fashion in that the lower rLm 76 encounters an annular step fixed in the housing.
Since, in this process, the plunger 9 it~elf is held fixed above the support plate 10 via the column S, the reduction in volume of the plug-in cartridge 2 that takes place causes the discharge of pasty compound 3 via the delivery mouthpiece 6 (cf. Fig.23).
The corresponding actuation can take place with the complete passage of the limited stroke travel which, seen in the axial direction, corxesponds to the extent of the pro~ection x. However, it is also possible, for example, for onl~ a subsection of the stroke travel to be passed. The downwards displacement of the plug-in car-tridge 2 takes place against the resto.rinq force of the spring-loaded foot r$ng 71, which restoring force pushes the plug-in cartridge 2 back into its basic position once again after release of the actuating surface 4. Since the plunger g adheres to the level of ~he column of the pas~y compound 3 and is thus also guided with a fric~ional grip Vnr: 177 857 _ _~0_417 Dr RI P.~G 30.08.1990 .. ;~.,. ,. . :

2~2~2~

_ 39 -on the c~rtridge inner wall, the column S is carried along to produce a respectively stepwi e extension using the ratchet action explained via the coupling of said plunger ko said column. The column S thus crea~es for the plunger 9 ~he nex~ higher support plane. ~his is continued until the column S reaches the extended final position visible from Fig. 1, or this final position is not produced in practical terms until extraction of the plug-in cartridge 2. The male part 30 then pro~ects somewhat beyond the upper end rLm S of the housing 1. Any instability with reference to the observance of the axiality of the individual parts 45-48 with respect to one another is absorbed by the resilient tongue 88. In practice, the latter also forms with its guide claws 89 a support element with a centring effect.
For the purpose of conditioning the next position of readiness of the dispenser Sp, the rotary manipulator 92 is now rotated such that the inner toothed pxofiled part 82 departs from the region of action of the corresponding outer toothed profiled part 81 in such a way that the smooth sliding sections 84 are now located opposite the inner toothed profiled parts. The column S
collapses, shortening its length. Given guidance that is more intensive frictionally, telescoping takes place simply with the aid of the fresh plug-in cartridge 2, which presses the plate 10 in the direction of the rotary manipulator 92. The fresh plug-in cartridge is rotation-ally locked immediately via the rib entry cross-section~
90. The resilient guide claws 89 of the tongue 8B enter a position of withdrawal with respPct to the longitudinal ribs 76, which otherwise guided them. The corresponding position of concealment emexges from Fig.22 However, the pushbutton-like coupling between plunger 9 and male part 80 of the plate 10 rotationally locked via the plunyer 9 is produced when the lowest point is reached or even as early as in the course of the plug-in movement.

vnr: 17? 85.? 20 417 Dr.R./P./G __ 30.08 1990 ,`' "~
'.

2~32~2~

Once the coupling position and plug~in position of the plug-in cartridge 2 are reached, the rotary manipulator 92 needs only to be rotated back once again by the angular amoun~ required ~or the purpose of en~aging the inner S toothed profiled part 82 in the outer toothed profiled part 81.
It will of course be understood that the present invenkion has been described above purely by way of example and that modifications of detail can be made within the scope of the invention.
The dependencies of the subsidiary claims hereinafter do not imply any limitation as to the possible ombinations of the features mentioned in those claims: the optional and the preferred features of the invention revealed in the preceding description, the drawings and the claims can be of importance both individually and also in any combination for the implementation of the invention.

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Claims

1. A dispenser for delivering pasty compounds, comprising a tubular housing, an insert assigned thereto in an axially displaceable fashion, of which the section projecting beyond one housing end has an actuating surface and the delivery mouthpiece, and comprising a plunger moving stepwise in the direction of the mouthpiece upon being actuated, characterized in that the insert is configured as a plug-in cartridge guiding the plunger and the advance of the plunger is achieved by means of displacement of the plug-in cartridge against a support plate of the housing resettable in the direction of the delivery mouthpiece.

2. A dispenser according to claim 1, characterized by a threaded resetting of the support plate.

3. A dispenser according to claim 2, characterized in that the resetting thread is formed by a telescopic thread, the telescopic terminal section of which carries the support plate, which is rotationally locked both in the housing and in the plug-in cartridge, and the telescopic drive section of which is connected to a rotary manipulator at the lower end of the housing.

4. A dispenser according to claim 2, characterized in that the resetting thread is a left-hand thread.

5. A dispenser according to claim 3, characterized in that the rotary manipulator is configured as a cap clipped onto the lower housing end.

6. A dispenser according to claim 5, characterized in that the cap base possesses a swivelling crank arm.

7. A dispenser according to claim 6, characterized in that the crank arm is configured as a disc arm.

8. A dispenser according to claim 7, characterized in that the disc arm has a manipulation aperture which is diametrically opposite the swivelling axis of the crank arm.

9. A dispenser according to claim 1, characterized in that in order to form a rotary lock in the housing, the support plate possesses at least one resilient tongue, to which a stop shoulder extending on the housing inner wall in the longitudinal direction is assigned.

10. A dispenser according to claim 9, characterized by a plurality of tongues and stop shoulders arranged in an angularly symmetric fashion.

11. A dispenser according to claim 1, characterized in that the support plate is rotationally locked by form-locking engagement on the underside of the plunger with respect to the plug-in cartridge.

12. A dispenser according to claim 11, characterized in that the rotary lock with respect to the underside of the plunger is formed by a toothed rim on the support side of the support plate.

13. A dispenser according to claim 12, characterized in that the teeth of the toothed rim possess locating bevels, and the plunger is fitted with individual receiving compartments for the teeth.

14. A dispenser according to claim 1, characterized by a rotary lock of the plug-in cartridge with respect to the housing.

15. A dispenser according to claim 14, characterized in that the rotary lock of the plug-in cartridge with respect to the housing is achieved by a slot/rib engagement orientated in the longitudinal direction of the housing.

16. A dispenser according to claim 15, characterized in that the plug-in cartridge carries a rib on its circumferential surface, and the housing has a slot which is open towards the upper end rim and extends at least over the stroke travel.

17. A dispenser according to claim 16, characterized by locking between the rib and slot in the outwardly directed basic position of the plug-in cartridge.

18. A dispenser according to claim 1, characterized in that the resetting of the support plate is achieved from a locking connection between the plunger and the support plate seated on a column extendable in the axial direction.

19. A dispenser according to claim 18, characterized in that the column consists of a plurality of parts that can be extended telescopically with respect to one another and are ratchet-secured.

20. A dispenser according to claim 18, characterized in that a sprung foot ring that moves the plug-in cartridge back into the basic position is assigned to the foot of the column.

21. A dispenser according to claim 19, characterized in that the parts of the column can be returned into the shortened column length by a crank drive.

22. A dispenser according to claim 21, characterized in that the crank drive is arranged covered at the lower end of the housing of the dispenser.

23. A dispenser according to claim 21, characterized by an overload protection in the crank drive.

24. A dispenser according to claim 19, characterized in that the telescopic movement of the parts of the column is achieved by a threaded engagement of the parts with one another in conjunction with rotary lock of the part of the column adjacent to the plunger.

25. A dispenser according to claim 24, characterized in that the threaded engagement is formed by resilient lugs of the parts forming the column, the resilient avoidance capability of which lugs represents an overload protection.

26. A dispenser according to claim 24, characterized in that the rotary lock is achieved by means of a resilient tongue, which is directed radially outwards from the said part of the column and is in form-locking longitudinal engagement with respect to the housing inner wall on at least one side.

27. A dispenser according to claim 27, characterized in that the locking connection is achieved as a pushbutton connection between a male part of the support plate and a female cavity of the plunger.

28. A dispenser according to claim 20, characterized in that the foot ring is rotationally locked by means of form-locking engagement with respect to the housing wall.

29. A dispenser according to claim 1, characterized by a clip-shaped undergrip between the rim of the plug-in cartridge and the housing inner wall in the basic position of the plug-in cartridge.

30. A dispenser according to claim 20, characterized in that a longitudinal engagement is achieved by means of a longitudinal rib of the housing wall, which longitudinal rib merges at the lower end just above the foot ring into a radially projecting protuberance that serves the rim of the plug-in cartridge as an undergrip.

31. A dispenser according to claim 21, characterized in that the crank drive is formed by a ratchet disc having a hold-out crank arm.

32. A dispenser according to claim 18, characterized by two resilient tongues bent in opposite directions as a rotary lock for the part of the column that carries them.

33. A dispenser according to claim 24, characterized by different lead angles of the thread, with the highest degree of lead at the part of the column remote from the crank.

34. A dispenser for delivering a pasty compound, comprising a tubular housing, an insert assigned thereto in an axially displaceable fashion, of which the section projecting beyond one housing end has an actuating surface and the delivery mouthpiece, and comprising a plunger moving stepwise in the direction of the mouthpiece upon being actuated, which insert is configured as a plug-in cartridge guiding the plunger and the advance of the plunger is achieved by means of displacement of the plug-in cartridge against a support plate of the housing resettable in the direction of the delivery mouthpiece and arranged on the end of a telescopic column of shortenable length, the support plate and plunger being in form-locking engagement with respect to one another, and a foot ring, to which there is assigned a return spring which moves the plug-in cartridge back into the basic position characterized in that the parts of the column which can be displaced telescopically with respect to one another, can be telescoped in a rotation angle setting.

35. A dispenser according to claim 34, characterized in that the rotation angle settings of the telescopic parts are limited by stops.

36. A dispenser according to claim 34, characterized in that the inner wall and the circumferential wall of the telescopic parts are composed of ratcheting toothed profiled parts and smooth sliding sections, which are located one after another in the circumferential direction.

37. A dispenser according to claim 34, characterized in that the uppermost telescopic part is rotationally locked with respect to the housing.

38. A dispenser according to claim 37, characterized in that the rotary lock is achieved by means of a tongue directed radially outwards, which is in longitudinal engagement with respect to at least one longitudinal rib of the housing inner wall, which longitudinal rib reaches as far as the upper end rim of the housing and by means of form-locking engagement in a foot ring collar of the plug-in cartridge likewise locks the latter rotationally.

39. A dispenser according to claim 38, characterized in that the rib entry cross-sections at the foot ring collar form an individuating index for the plug-in cartridge.

40. A dispenser according to claim 34, characterized in that the support plate possesses teeth, which project upwards in the form of a crown and engage with the plunger in a rotationally locking fashion.

41. A dispenser according to claim 34, characterized in that the lowermost telescopic part is directly continued into a rotary manipulator for changing the rotation angle setting of the other telescopic parts.