GB2189863A - A differential screw and a web forming die - Google Patents
A differential screw and a web forming die Download PDFInfo
- Publication number
- GB2189863A GB2189863A GB08707367A GB8707367A GB2189863A GB 2189863 A GB2189863 A GB 2189863A GB 08707367 A GB08707367 A GB 08707367A GB 8707367 A GB8707367 A GB 8707367A GB 2189863 A GB2189863 A GB 2189863A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spool
- nut
- web
- rods
- differential screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000007493 shaping process Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 239000011295 pitch Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- SUBDBMMJDZJVOS-UHFFFAOYSA-N 5-methoxy-2-{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole Chemical compound N=1C2=CC(OC)=CC=C2NC=1S(=O)CC1=NC=C(C)C(OC)=C1C SUBDBMMJDZJVOS-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/005—Set screws; Locking means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
- B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0216—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the position of the plates to be connected being adjustable
- F16B5/0233—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the position of the plates to be connected being adjustable allowing for adjustment perpendicular to the plane of the plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/97—Constructional details of connections not covered for in other groups of this subclass having differing thermal expansion coefficients
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A differential screw mechanism has an externally and internally threaded adjusting nut 2 which has a plurality of slots 19 formed along its length. The internal threads of the nut 2 co-operate with an externally threaded rod 1, fixed to the lip 14 of a die. A spool 3 has a threaded bore which receives the nut 2 and has a slot 16 along its length. The spool 3 has a head 18 having a flattened portion 17 engageable by a plate 7 mounted on a clamp bar 5. The internal threads of nut 2 are of a different pitch from the external threads, so that rotation of the nut 2 moves the rod 1 axially. <IMAGE>
Description
SPECIFICATION
A differential screw and a web forming die
The present invention relates to a differential screw mechanism, and also to web manufacturing dies incorporating such mechanisms to shape and control the die aperture for the thickness of the web.
U.S. Patent No. 4,507,073 (Shelton) discloses web manufacturing apparatus in which a flexible shaping member engages fluid material from which the web is formed. A support extending parallel to the shaping member and a plurality of thermal expansion rods extending between the shaping member and the support are disclosed. The use of the thermal expansion rods and the support is such that the shaping member is flexed to control the web thickness profile by means of electrical heaters on the thermal expansion rods.
Each thermal expansion rod is fixed to the shaping member and is secured to the support via a differential screw mechanism that includes a driven screw and an adjusting screw positioned in tandem in a threaded bore through the support. The driven screw can be turned by turning the adjusting screw. The driven and adjusting screws have internally threaded bores and one end of the thermal expansion rod screws into the bore of the driven screw. A jam screw is screwed into the bore of the adjusting screw to be screwed down against the end of the thermal expansion rod within the differential screw mechanism.
U.S. Patent No. 4,514,348 (Iguchi, et al) discloses an automatic system which measures the thickness of a web leaving the die, compares the measured thickness with a predetermined thickness, and automatically tightens adjusting screws to maintain the desired thickness. Rough adjustment is effected by tightening or loosening the adjusting screws while fine adjustment is achieved by heating tension bolts, both under automatic control.
As is known from the above prior art, in the manufacture of webs of plastic material it is necessary to provide control of the thickness of the web across its width. Where the web is formed from fluid material, this control can be accomplished by providing the machine that makes the web with an elongate shaping member that engages the web material at a location in the machine at which the material is in a plastic state and flexing the shaping member along its length which is traverse to the direction of movement of the web material, to profile one side of the material in a way that will cause the completed web to have a constant thickness throughout.
The flexing of the shaping member is effected by a series of rod-like devices arranged in a line down the length of the shaping member, the devices exerting forces on the shaping member under the control, for example, of a computer receiving signals from web thickness sensors positioned to determine the thickness of a completed web.
Another type of force exerting means to effect the flexing the shaping member is a thermal expansion rod which is a rod equipped with a heating element. Portions of the rod can be caused to expand by varying amounts to adjust the force the rod exerts on the shaping member engaged by the rod. One end of the rod is fixed and the other end bears against the shaping member so that the flexing of the shaping member can be controlled by the rate at which electrical energy is supplied to the heating elements on the rods.
Since the power supplied to each heating element can be precisely controlled, the thermal expansion rods offer a capability for precise control of the shape of the shaping member and the control is, in turn, utilized precisely to control the thickness of the web across its width. An example of such an apparatus is shown in U.S. Patent No. 4,454,084 (Smith et a).
While the above use of electrically stimulated expansion rods has shown substantial merit theoretically, its full potential practically has not been realized, due mainly to the problems associated with the mechanical adjustments and settings of the rods. These adjustments and settings are less precise than the control which is achievable by computer and selective electrical heating. These mechanical limitations arise from the coarseness of the mechanical adjustment and by the fact that a large number of rods are utilized. The practicality of sensitive computer control with a large number of rods in the presence of coarse mechanical adjustment is such that the errors inherent in the mechanical set up are much greater than the accuracies theoretically obtainable from the computer-controlled electrical heating system.
The present invention aims at solving the problems of thermal expansion rod control in the configuration of a shaping member of a web manufacturing machine by providing modifications to a known form of differential threaded die lip adjusting bolt assembly. The modifications may result in the elimination of inherent backlash in the adjusting assembly when the rod or bolt shifts from a pulling mode to a pushing mode. The modification is particularly advantageous when incorporated with temperature controlled die gap adjusting studs or bolts. The modification allows the differential thread adjusting assembly to be turned to provide a lip gap adjustment without undoing or loosening any type of nut locking device.
In this manner, a precise adjustment can be obtained without the necessity of adjusting any other parts which could cause further, larger changes in the positioning of the shaping member.
Accordingly, one aspect of this invention provides a differential screw mechanism comprising a slotted spool having an internallythreaded bore, and an adjusting nut having a slot formed therein, the adjusting nut having external threads formed in the region of the slot in the nut, and the external threads cooperating with the internally threaded bore of the slotted spool.
In a most preferred form of this invention, a differential screw mechanism comprises an internally-threaded spool having a substantially axial slot; an externally-threaded nut co-operable with the spool and also having a substantially axial slot, the nut having an internally threaded bore engageable with an externally threaded adjustment member, and the pitch of the internal threads of the nut being different from the pitch of the external threads thereof, and clamping means acting on the spool to close the spool to the nut and hence also the nut to the adjustment member.
Advantageously, the nut has a plurality of slots formed along its length. The spool may have a head with a flat thereon, which flat is engaged by a clamp plate, to limit rotation of the spool and resist reactive axial forces acting on the spool.
It will be appreciated that the dual clamping causes contraction of the spool on the nut and of the nut on the rod, so eliminating backlash, whilst still allowing adjustment of the rod simply by rotating the head of the adjustment nut. Since all the elements of the differential screw have the same axial positions, the rod is advanced by just the amount selected.
According to a second aspect of this invention, there is provided a web manufacturing machine comprising an elongate shaping member for controlling the thickness of the web which is to be formed thereby, a support extending parallel to the shaping member, and a plurality of thermal expansion rods mounted on the support and extending into the shaping member, in combination with a differential screw mechanism according to this invention as described above for each said rods, the spool of which mechanism is mounted on said support and the nut of which mechanism is engaged with a rod.
According to yet another aspect of this invention, there is provided a web forming die having an adjustable lip portion defining the thickness of the web and a support portion spaced from the adjustable lip portion, adjustment of the lip being performed by a plurality of thermally-responsive rods, in combination with means for mounting said rods in said support portion, said means for each rod comprising a nut having an internally-threaded bore co-operating with corresponding threads on the rod and also having an externally threaded portion, there being a plurality of
slots extending along the internally and exter
nally threaded portions, a spool having a body portion and a flattened head portion, the body portion of the spool having internal threads formed therein and being slotted along the entire length thereof the internal threads of the spool co-operating with the external threads of the nut, and means to limit rotation of the spool by clamping the spool against the flattened head portion thereof.
By way of example only, one specific embodiment of this invention will now be described in detail, reference being made to the accompanying drawings, in which:
Figure 1 is a perspective view of a preferred embodiment of web-manufacturing apparatus constructed in accordance with the present invention;
Figure 2 is a perspective view of one portion of the adjusting nut employed in the invention;
Figure 3 is a perspective view of the other portion of the adjusting nut employed with the invention; and
Figure 4 is a cross-section showing various elements of the web-manufacturing apparatus in schematic form.
Referring now to the drawings, and specifically Figure 1, a die 15 has an aperture 11 from which there is drawn a web of plastic material in a manner well known in the art.
The aperture 11 is formed between lip portions 12 and 14 of die 15. In the embodiment of Figure 1, the lip portion 14 of the die 15 is adjustable throughout its length and is the member which controls the thickness of the web. Lip portion 12 is fixed.
The thickness control is provided by adjusting studs 1 which are connected between the lip portion 14 and fixed bracket arm 13. A plurality of studs are shown, each affixed to the lip portion 14 by set screws 9 and/or lock-nuts 20 at the base of each adjusting stud.
As known in the prior art, the studs 1 are heated via electric heaters. Each of the studs
1 has electrical power fed via conductors 10 to a cartridge heater (not shown) within the stud, and are thus caused to expand or contract by the application of power, typically under control of a computer, not shown.
The studs are each threaded into an adjusting nut 2 which in turn is threaded into a spool 3 and the assembly is secured by a clamp bar 5 to the shoulder portion 13 of the die via screws or bolts 4. Bar 5 has a plurality of additional or secondary clamps 7 mounted thereon, one clamp for each stud 1. The clamps 7 are affixed to bar 5 via bolts 6. As can now be seen, the bar 5 is tightened down over stud 1 to hold same in place. As will be further explained, each clamp 7 is affixed over a flattened portion of the associated spool 3, to prevent the rotation thereof.
As shown in Figures 1 and 3, spool 3 hav ing internal threads and a slot 16 is threadedly engaged with one end of each of the studs 1.
This spool 3 is shown in more detail in Figure 3 as having slot 16 along one entire side of the spool and two flattened portions 17 formed on opposite sides of the head 18 of spool 3. In Figures 1 and 3, the flattened portion 17 is shown co-operating with clamp 7 whereby the engagement of the flattened portion 17 with the clamp will prevent the spool 3 from rotating.
As seen in Figure 4, the clamp 7 has an Lshape to accommodate the stepped portion 21 of the spool 3, adjacent the flattened portion 17. The co-operation of the end of the clamp with the stepped portion ensures that the spool will resist any reactive forces tending to raise the spool and/or the adjusting stud 1 axially.
Additionally, it is necessary for two flattened portions to be formed on the spool so that the spool engagement with the adjusting nut can be varied to provide proper registration of the members of the adjusting mechanism, as will be described below.
An adjusting nut 2 has both external and internal threads formed thereon and is threadedly engaged within the internal threads of spool 3. As shown in more detail in Figure 2, the nut 2 has a plurality of slots 19 formed therein. None of the slots 19 are cut for the full length of the nut but are cut for apprqximately three-quarters of the length of the nut.
The adjusting studs 1 coacting with the adjusting nut 2 and spool 3 are used to adjust the gap 11 between the lips 12 and 14 of the die. Die lip 14 is rigidly attached to the ends of the adjusting studs 1 by the set screws 9 and/or lock-nuts 22. The spool 3 is held rigid with respect to bracket arm 13 which is rigid whereas die lip 14 is movable. Therefore, movement of the adjusting stud relative to bracket arm 13 will move die lip 14 to adjust the gap of the die.
The movement of the stud 1 is controlled by means of the differential thread adjustment apparatus which consists primarily of stud 1 and adjusting nut 2 coacting with spool 3.
Adjusting nut 2 has internal threads which mate with the external threads of the stud and has external threads which mate with the internal threads of spool 3. The adjusting stud will move relative to the stationary spool in relation to the difference in the thread pitches of the internal and external threads on the adjusting nut or alternatively the difference between the thread pitches of the stud and the spool. When the pitch of the spool is less than the pitch of the adjusting stud, as for example 12 threads to the inch (about 2.17 mm thread pitch) for the spool versus 13 threads to the inch (about 1.96 mm thread pitch) for the adjusting stud, then tightening down the adjusting nut twelve turns will cause the stud to move 1/13 of an inch (about 1.96 mm) downward.Therefore, there is a differential of 1/13 of an inch movement (about 1.96mm) downward by movement of the adjusting nut one inch (about 25.4 mm) downward, with the ratios mentioned. Should the pitches be reversed so that the greater pitch is on the spool and the lesser is on the stud, then the stud would be backed off as the adjusting nut is moved down the stud.
Each spool is restrained from motion by a clamp 7 which is in turn secured by a bolt 6.
The spool clamping bar 5 is secured to the body of the die 8 via the screws 4, the tightening of which eliminates clearances between the spool 3, the adjusting nut 2, and the stud 1 by closing the slot 16 in spool 3 and the slots 19 in adjusting nut 2. The slot 16 preferably extends the length of spool 3 and is positioned intermediate the flats on the head 17 of the spool so that the plane of the slot will be parallel to the space between the clamping bar 5 and the bracket arm 13. The multiple slots 19 in the adjusting nut preferably extend partially up the length of the nut to be in registration with the length of the spool when in the operative position.Tightening the screws 4 will thus perform a clamping action on the spool and the adjusting nut, the slots 16 in the spool and 19 in the adjusting nuts allowing for deformation of the spool and the adjusting nut so that these parts fit snugly together and the adjusting nut fits snugly to the stud. The tight fit will minimize or eliminate any backlash between the elements.
It will be appreciated that the above described apparatus allows precise control of the thickness of the web produced by the web manufacturing machine. The differential adjusting mechanism is substantially free of backlash and capable of precise adjustment. The mechanism particularly lends itself to use with thermal expansion rods to modulate the setting of a die shaping member.
The differential screw adjusting mechanisms are relatively simple and economical to produce, and are reliable in operation. Once clamped, the mechanisms cannot accidentally be moved from their adjustment points, for example by shock or vibration. Apart from the clamping arrangements, no other locking mechanisms are needed to ensure that the required settings are accurately maintained.
Claims (12)
1. A differential screw mechanism comprising a slotted spool having an internallythreaded bore, and an adjusting nut having a slot formed therein, the adjusting nut having external threads formed in the region of the slot in the nut, and the external threads cooperating with the internally threaded bore of the slotted spool.
2. A differential screw mechanism according to claim 1, wherein the adjusting nut has a bore internally threaded in the region of the slotted external threads.
3. A differential screw mechanism according to claim 2, wherein the internal threads of the adjusting nut cooperatively engage an externally threaded member for which adjustment is to be provided.
4. A differential screw mechanism according to any of claims 1 to 3, wherein the spool has a flattened portion.
5. A differential screw mechanism comprising an internally-threaded spool having a substantially axial slot, an externally-threaded nut co-operable with the spool and also having a substantially axial slot, the nut having an internally threaded bore engageable with an externally threaded adjustment member and the pitch of the internal threads of the nut being different from the pitch of the external threads thereof, and clamping means acting on the spool to close the spool to the nut and hence also the nut to the adjustment member.
6. A differential screw as mechanism substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
7. A web-manufacturing machine comprising an elongate shaping member for controlling the thickness of a web which is to be formed thereby, a support extending parallel to the shaping member, and a plurality of thermal expansion rods mounted on the support and extending into the shaping member, all in combination with a differential screw mechanism according to any of claims 1 to 5, the spool of which mechanism is mounted on said support and the nut of which mechanism is engaged with said rods.
8. A die for generating a web of plastic material and having an aperture the width of which defines the thickness of the web of plastic material, said aperture being formed by a fixed lip portion and a movable lip portion and adjusting means connected to said movable lip portion for effecting the adjustment thereof which adjusting means comprises a plurality of rods anchored in the movable lip portion, the rods being electrically heated to expand and contract thereby adjusting said movable lip portion, in combination with a plurality of differential screw mechanisms eachaccording to any of claims 1 to 5 and each associated with one of said rod respectively whereby the rods can be adjusted mechanically, each spool having a flattened head portion and a radially extending portion and there being clamping means connected to each spool for clamping the same and preventing both rotational and axial movement by engaging said flattened portion and said radially extending portion.
9. A web-forming die having an aperture the shape of which is controlled by a plurality of rods, in combination with a plurality of differential screw mechanisms each according to any of claims 1 to 5 each for mechanically mounting one end of each of said rods, wherein there is provided clamping and compression means connected to the spool of each mechanism for tightening the spool by closing the slot thereof and for limiting rotation of the spool by presenting a flattened surface to the corresponding flattened portion of the spool.
10. A die according to claim 9, wherein the adjusting nut includes a plurality of slots formed therein whereby the adjusting nut is compressed by the spool upon the clamping and compression thereof, to limit backlash in the screw threads interconnecting the nut with the rod.
11. A web-forming die having an adjustable lip portion defining the thickness of the web and a support portion spaced from the adjustable lip portion, adjustment of the lip being performed by a plurality of thermallyresponsive rods, in combination with means for mounting said rods in said support portion, said means for each rod comprising a nut having an internally-threaded bore co-operating with corresponding threads on the rod and an externally threaded portion, there being a plurality of slots extending along the internally and externally threaded portions, a spool having a body portion and a flattened head portion, the body portion of the spool having internal threads formed therein and being slotted along the entire length thereof, the internal threads of the spool co-operating with the external threads of the nut, and means to limit rotation of the spool by clamping the spool against the flattened head portion thereof.
12. An adjustable die for a plastics webforming apparatus which die is constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84471386A | 1986-03-27 | 1986-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8707367D0 GB8707367D0 (en) | 1987-04-29 |
| GB2189863A true GB2189863A (en) | 1987-11-04 |
Family
ID=25293443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08707367A Withdrawn GB2189863A (en) | 1986-03-27 | 1987-03-27 | A differential screw and a web forming die |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS62227721A (en) |
| DE (1) | DE3641438A1 (en) |
| GB (1) | GB2189863A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2202299A (en) * | 1987-03-02 | 1988-09-21 | Derek George James Flower | Differential screw and nut mechanism |
| US7753626B2 (en) * | 2007-01-18 | 2010-07-13 | Kennametal Inc. | Micro-adjustable differential screw assembly |
| CN106931059A (en) * | 2017-04-13 | 2017-07-07 | 瑞安市爱得利液压制动有限公司 | A kind of disk brake caliper of height adjustable |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834720A1 (en) * | 1988-10-12 | 1990-04-26 | Hoechst Ag | Adjustment screw |
| CH677718A5 (en) * | 1989-02-21 | 1991-06-28 | Nestle Sa | |
| FR2681664A1 (en) * | 1991-09-20 | 1993-03-26 | Peugeot | ADJUSTABLE FIXING DEVICE THROUGH A THREADED CONNECTION. |
| US5466402A (en) * | 1994-05-13 | 1995-11-14 | Corma Inc. | Gap adjustment of a plastic flow channel in a plastic part forming device |
| WO2009035161A2 (en) * | 2007-09-14 | 2009-03-19 | Tonen Chemical Corporation | An extrusion die with manifold system and a method of extrusion |
| JP5107077B2 (en) * | 2008-02-03 | 2012-12-26 | 株式会社プラスチック工学研究所 | Thermal displacement T-die, heat actuator adjuster, and film or sheet manufacturing method |
| KR101064169B1 (en) * | 2009-05-19 | 2011-09-15 | 주식회사 나래나노텍 | An Improved Gap Adjusting Device for Slit Die, and A Slit Die and A Coating Apparatus Having the Same |
| JP5478529B2 (en) * | 2011-02-15 | 2014-04-23 | 三木プーリ株式会社 | Shaft coupling |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB261414A (en) * | 1925-11-16 | 1928-02-15 | Charles Terres Weymann | Improvements in or relating to feed-screw adjusting mechanism for swinging panels and the like |
| GB797594A (en) * | 1954-03-18 | 1958-07-02 | Ibm | Magnetic transducer head assembly |
| GB873680A (en) * | 1959-01-14 | 1961-07-26 | Marconi Wireless Telegraph Co | Improvements relating to adjustment devices |
| GB900593A (en) * | 1959-01-20 | 1962-07-11 | Graphic Technology Ltd | Gearing for adjusting the phase relationship between driving and driven shafts |
| GB1125576A (en) * | 1965-02-19 | 1968-08-28 | Commissariat Energie Atomique | A device for the transmission of movements |
| GB1286608A (en) * | 1970-05-19 | 1972-08-23 | Warner Electric Brake & Clutch | Linear positioning devices and the like |
| GB1454718A (en) * | 1974-05-17 | 1976-11-03 | Kubota Ltd | Rotary valve |
-
1986
- 1986-12-04 DE DE19863641438 patent/DE3641438A1/en not_active Withdrawn
-
1987
- 1987-01-13 JP JP62005877A patent/JPS62227721A/en active Pending
- 1987-03-27 GB GB08707367A patent/GB2189863A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB261414A (en) * | 1925-11-16 | 1928-02-15 | Charles Terres Weymann | Improvements in or relating to feed-screw adjusting mechanism for swinging panels and the like |
| GB797594A (en) * | 1954-03-18 | 1958-07-02 | Ibm | Magnetic transducer head assembly |
| GB873680A (en) * | 1959-01-14 | 1961-07-26 | Marconi Wireless Telegraph Co | Improvements relating to adjustment devices |
| GB900593A (en) * | 1959-01-20 | 1962-07-11 | Graphic Technology Ltd | Gearing for adjusting the phase relationship between driving and driven shafts |
| GB1125576A (en) * | 1965-02-19 | 1968-08-28 | Commissariat Energie Atomique | A device for the transmission of movements |
| GB1286608A (en) * | 1970-05-19 | 1972-08-23 | Warner Electric Brake & Clutch | Linear positioning devices and the like |
| GB1454718A (en) * | 1974-05-17 | 1976-11-03 | Kubota Ltd | Rotary valve |
Non-Patent Citations (1)
| Title |
|---|
| WO 80/00270 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2202299A (en) * | 1987-03-02 | 1988-09-21 | Derek George James Flower | Differential screw and nut mechanism |
| US7753626B2 (en) * | 2007-01-18 | 2010-07-13 | Kennametal Inc. | Micro-adjustable differential screw assembly |
| CN106931059A (en) * | 2017-04-13 | 2017-07-07 | 瑞安市爱得利液压制动有限公司 | A kind of disk brake caliper of height adjustable |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8707367D0 (en) | 1987-04-29 |
| DE3641438A1 (en) | 1987-10-01 |
| JPS62227721A (en) | 1987-10-06 |
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