US3679336A - Dry lubricant coating of extruded tubing - Google Patents
Dry lubricant coating of extruded tubing Download PDFInfo
- Publication number
- US3679336A US3679336A US47360A US3679336DA US3679336A US 3679336 A US3679336 A US 3679336A US 47360 A US47360 A US 47360A US 3679336D A US3679336D A US 3679336DA US 3679336 A US3679336 A US 3679336A
- Authority
- US
- United States
- Prior art keywords
- core pin
- tubing
- extruder
- die
- mica
- 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.)
- Expired - Lifetime
Links
- 239000000314 lubricant Substances 0.000 title claims abstract description 17
- 239000011248 coating agent Substances 0.000 title description 6
- 238000000576 coating method Methods 0.000 title description 6
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims description 11
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000010445 mica Substances 0.000 abstract description 30
- 229910052618 mica group Inorganic materials 0.000 abstract description 30
- 239000011800 void material Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Images
Classifications
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
- B29C37/0071—Dusting machines
-
- 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
-
- 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
- B29C48/04—Particle-shaped
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/001—Tubular films, sleeves
Definitions
- ABSTRACT A dry lubricant is applied to the interior surface of an extruded tubing to assist in the placement of the tubing on piping. As the tubing is emerging from the extruder, mica powder is sprayed on the inside of the tubing. The mica powder is placed on the inside of the tubing by a rotating feed structure which forces the powder into the interior of the tube. A vibrating hopper is used to hold the mica powder in a nonpacked state. The apparatus is particularly useful with an in-line extruding head.
- the invention relates to an apparatus for lubricating the interior surface of an extruded tubing as it leaves the extruder.
- a void is formed in the center of the tubing; and unless this void is filled with air, the external atmospheric pressure will tend to collapse the tubing and possibly cause sticking of the sidewalls to form a permanent bond therebetween and, therefore, a flattencd tube.
- Soap stone, mica dust, zinc stearate and other dry dust lubricants have been used extensively in the prior art to eliminate the above problems. Also, many different apparatuses are available for applying the dry powders to the interior of the tubing. When mica dust is used, it is very important that the dust be kept as a powder because of the tendency of mica to pack itself into lump-like structures. The spraying of the mica powder on the interior walls will provide a good coating to the interior walls of the tubing. The pushing of lumps of mica into the interior of a piece of tubing will not provide a good coating to these interior walls; and, therefore, collapsed sidewall structures could tend to stick together and maintain the tube in a collapsed state.
- the object of the apparatus herein is to provide a mica dusting apparatus which provides a complete uniform coating to the interior wall of the tubing.
- the apparatus herein is for use with an in-line extruding head and differs substantially from that of the above-mentioned copending application which is directed to a cross-head extruder.
- the invention herein is directed to a mica dispensing apparatus for applying mica dust to the interior walls of an extruded tubing.
- a rotating drive structure forces the mica dust out to the core pin of the extruder so that the mica dust is sprayed onto the interior walls of the newly extruded tubing.
- the tendency of the mica dust to pack itself into lumps is eliminated by vibrating the hopper which contains the mica dust.
- the spring-like structure of the rotating drive structure breaks up any lumps that may exist in the mica powder.
- the mica dispensing apparatus is so positioned relative to an in-line extruder so that it does not interfere with the operation of the extruder in forming the extruded tube.
- FIGURE is a cross-sectional view of the extruder and lubricant feeding structure.
- the extruding head 3 has the conventional core structure 6 which is utilized to form the internal diameter of the extruded tube.
- the extrudate passes around the core pin 6 and out the opening 7 of the extruding head die.
- the core pin 6 forms the internal diameter of the extruded tubing while the outer diameter of the opening 7 forms the outer dimension of the extruded tubing.
- This apparatus is called an in-line extruding head structure because the core pin and extruder head die are directly in line with the feed of the extruder body 2 and feed screw 4.
- the internal diameter of the tubing 8 be coated with a substance which would prevent the internal walls from sticking together if the tubing should be squeezed together.
- the internal walls of the tubing be provided with a lubricant so that the tubing may be slid readily over a pipe structure.
- Mica powder is an excellent lubricant and antistick agent for use on the internal walls of the tubing.
- the mica powder For the mica powder to be of any value to prevent sticking, it must be applied to the internal walls of the tubing as soon as it leaves the extruding die. The placing of the mica powder on the internal walls of the tubing is accomplished by use of the dispensing mechanism 9 which has a mica feed structure 10 passing through the hollow core pin 6.
- the feed structure 10 is composed of a spring-like member 11 which is driven by a motor means 12 in a rotating manner.
- This spring means passes through a hopper 13 which contains the mica 14.
- a vibrating apparatus 15 vibrates the hopper to keep the mica in an agitated state so that it will not form lumps.
- the spring-like member 11 passes through the hopper of mica and picks up the mica and forces it down through a housing 16.
- the housing 16 is connected to the extruder body 2 and passes from the extruder body 2 to the core pin 6 through one of the support elements 17 which supports the core pin in position in the passageway of the extruder head die 3.
- the feed screw 11 turns within the core pin and passes through a bore of the core pin until it emerges at the opening 18 of the core pin.
- the rotating action of the spring-like element ll forces the mica from the hopper down through the extruder body and core pin and out the opening 18 where it is dusted against the inside wall of the extruded tubing 8.
- a core pin used to form the internal diameter of the tube while the extruder head die forms the external diameter of the tube, the core pin being placed within an opening in the head die, means in line with the core pin and die feeding extrudate directly to the core die and forcing the extrudate through the core die and around the core pin to form the hollow tubular device, the improvement comprising a passageway in the center of the core pin with an opening where an extruded tube emerges from the extruder head die, a curved passageway in the extruder structure connected with the passageway in the core pin, a vibrating hopper containing dry powder lubricant, and helical spring-like rotating means passing through the hopper of dry powder lubricant and through the passageways of the extruder structure and core pin to force dry lubricant from the vibrating hopper through the passageways and out the opening in the core pin to dust dry lubricating powder on the internal walls of an extruded tube.
Abstract
A dry lubricant is applied to the interior surface of an extruded tubing to assist in the placement of the tubing on piping. As the tubing is emerging from the extruder, mica powder is sprayed on the inside of the tubing. The mica powder is placed on the inside of the tubing by a rotating feed structure which forces the powder into the interior of the tube. A vibrating hopper is used to hold the mica powder in a nonpacked state. The apparatus is particularly useful with an in-line extruding head.
Description
United States Patent Bagley et al.
[ 51 July 25,1972
[54] DRY LUBRICANT COATING OF EXTRUDED TUBING [72] Inventors: Donald H. Bagley, East Freetown; Richard L. Erickson, Braintree, both of Mass.
[73] Assignee: Armstrong Cork Company, Lancaster, Pa.
[22] Filed: June 18, 1970 [21] Appl. No.: 47,360
52 us. Cl ..425/95, 425/380, 425/131,
425/200 51 Int. Cl ..B29d 23/04 58 FieldofSearch ..18/l4H, 12 SH; 222/198 [56] References Cited UNITED STATES PATENTS 2,199,425 5/1940 Waring ..18/l4 H X 2,576,444 11/1951 Clinefelter ..l8/l4 H X 2,905,365 9/1959 Thayer et al ..222/198 3,183,288 5/1965 Taylor et al. 1 8/14 H X 3,285,200 11/1966 Slaybaugh et al. ..18/12 SH UX Primary Examiner.l. Spencer Overholser Assistant Examiner-Michael 0. Sutton Attorney-Clifford B. Price [57] ABSTRACT A dry lubricant is applied to the interior surface of an extruded tubing to assist in the placement of the tubing on piping. As the tubing is emerging from the extruder, mica powder is sprayed on the inside of the tubing. The mica powder is placed on the inside of the tubing by a rotating feed structure which forces the powder into the interior of the tube. A vibrating hopper is used to hold the mica powder in a nonpacked state. The apparatus is particularly useful with an in-line extruding head.
1 Claim, 1 Drawing Figure DRY LUBRICANT COATING OF EXTRUDED TUBING CROSS-REFERENCE TO COPENDING APPLICATION The invention herein is a modification of the apparatus set forth in Application Ser. No. 793,488, filed .Ian. 23, 1969, in the name of Earl E. Heinzelman, now US. Pat. No. 3,579,732, issued May 25, 1971.
BACKGROUND OF THE INVENTION 1 Field of the Invention The invention relates to an apparatus for lubricating the interior surface of an extruded tubing as it leaves the extruder.
2. Description of the Prior Art In apparatus for extruding from rubber or plastic continuous lengths of tubular or closed cross-sectional material such as hoses, inner tubes, sealing gaskets, etc., it is usually necessary to insert a lubricant of some type into the interior of the extrusion to coat the surface so as to prevent the sticking together of the walls if they collapse. Also, with a tubing which is meant to slide over piping, it is desirable to have a lubricant on the internal surface of the tubing to assist in the sliding of the tubing over the piping. Also during the extruding, a void is formed in the center of the tubing; and unless this void is filled with air, the external atmospheric pressure will tend to collapse the tubing and possibly cause sticking of the sidewalls to form a permanent bond therebetween and, therefore, a flattencd tube.
Soap stone, mica dust, zinc stearate and other dry dust lubricants have been used extensively in the prior art to eliminate the above problems. Also, many different apparatuses are available for applying the dry powders to the interior of the tubing. When mica dust is used, it is very important that the dust be kept as a powder because of the tendency of mica to pack itself into lump-like structures. The spraying of the mica powder on the interior walls will provide a good coating to the interior walls of the tubing. The pushing of lumps of mica into the interior of a piece of tubing will not provide a good coating to these interior walls; and, therefore, collapsed sidewall structures could tend to stick together and maintain the tube in a collapsed state. Also, good lubrication is only secured when a mica powder completely coats the interior wall of the tubing. Therefore, the object of the apparatus herein is to provide a mica dusting apparatus which provides a complete uniform coating to the interior wall of the tubing. The apparatus herein is for use with an in-line extruding head and differs substantially from that of the above-mentioned copending application which is directed to a cross-head extruder.
SUMMARY OF THE INVENTION The invention herein is directed to a mica dispensing apparatus for applying mica dust to the interior walls of an extruded tubing. A rotating drive structure forces the mica dust out to the core pin of the extruder so that the mica dust is sprayed onto the interior walls of the newly extruded tubing. The tendency of the mica dust to pack itself into lumps is eliminated by vibrating the hopper which contains the mica dust. Also, the spring-like structure of the rotating drive structure breaks up any lumps that may exist in the mica powder. The mica dispensing apparatus is so positioned relative to an in-line extruder so that it does not interfere with the operation of the extruder in forming the extruded tube.
BRIEF DESCRIPTION OF THE DRAWING The FIGURE is a cross-sectional view of the extruder and lubricant feeding structure.
DESCRIPTION OF THE PREFERRED EMBODIMENT screw structure 4 which forces the extrudate through the passageway 5 toward the extruding head 3. The extruding head 3 has the conventional core structure 6 which is utilized to form the internal diameter of the extruded tube. The extrudate passes around the core pin 6 and out the opening 7 of the extruding head die. The core pin 6 forms the internal diameter of the extruded tubing while the outer diameter of the opening 7 forms the outer dimension of the extruded tubing. This apparatus is called an in-line extruding head structure because the core pin and extruder head die are directly in line with the feed of the extruder body 2 and feed screw 4.
It is desirable that the internal diameter of the tubing 8 be coated with a substance which would prevent the internal walls from sticking together if the tubing should be squeezed together. Also, it is desirable that the internal walls of the tubing be provided with a lubricant so that the tubing may be slid readily over a pipe structure. Mica powder is an excellent lubricant and antistick agent for use on the internal walls of the tubing. For the mica powder to be of any value to prevent sticking, it must be applied to the internal walls of the tubing as soon as it leaves the extruding die. The placing of the mica powder on the internal walls of the tubing is accomplished by use of the dispensing mechanism 9 which has a mica feed structure 10 passing through the hollow core pin 6.
The feed structure 10 is composed of a spring-like member 11 which is driven by a motor means 12 in a rotating manner. This spring means passes through a hopper 13 which contains the mica 14. A vibrating apparatus 15 vibrates the hopper to keep the mica in an agitated state so that it will not form lumps. The spring-like member 11 passes through the hopper of mica and picks up the mica and forces it down through a housing 16. The housing 16 is connected to the extruder body 2 and passes from the extruder body 2 to the core pin 6 through one of the support elements 17 which supports the core pin in position in the passageway of the extruder head die 3. The feed screw 11 turns within the core pin and passes through a bore of the core pin until it emerges at the opening 18 of the core pin. The rotating action of the spring-like element ll forces the mica from the hopper down through the extruder body and core pin and out the opening 18 where it is dusted against the inside wall of the extruded tubing 8.
What is claimed is:
1. In an extruder structure for forming hollow tubular devices, a core pin used to form the internal diameter of the tube while the extruder head die forms the external diameter of the tube, the core pin being placed within an opening in the head die, means in line with the core pin and die feeding extrudate directly to the core die and forcing the extrudate through the core die and around the core pin to form the hollow tubular device, the improvement comprising a passageway in the center of the core pin with an opening where an extruded tube emerges from the extruder head die, a curved passageway in the extruder structure connected with the passageway in the core pin, a vibrating hopper containing dry powder lubricant, and helical spring-like rotating means passing through the hopper of dry powder lubricant and through the passageways of the extruder structure and core pin to force dry lubricant from the vibrating hopper through the passageways and out the opening in the core pin to dust dry lubricating powder on the internal walls of an extruded tube.
Claims (1)
1. In an extruder structure for forming hollow tubular devices, a core pin used to form the internal diameter of the tube while the extruder head die forms the external diameter of the tube, the core pin being placed within an opening in the head die, means in line with the core pin and die feeding extrudate directly to the core die and forcing the extrudate through the core die and around the core pin to form the hollow tubular device, the improvement comprising a passageway in the center of the core pin with an opening where an extruded tube emerges from the extruder head die, a curved passageway in the Extruder structure connected with the passageway in the core pin, a vibrating hopper containing dry powder lubricant, and helical spring-like rotating means passing through the hopper of dry powder lubricant and through the passageways of the extruder structure and core pin to force dry lubricant from the vibrating hopper through the passageways and out the opening in the core pin to dust dry lubricating powder on the internal walls of an extruded tube.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4736070A | 1970-06-18 | 1970-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3679336A true US3679336A (en) | 1972-07-25 |
Family
ID=21948533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US47360A Expired - Lifetime US3679336A (en) | 1970-06-18 | 1970-06-18 | Dry lubricant coating of extruded tubing |
Country Status (1)
Country | Link |
---|---|
US (1) | US3679336A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3950122A (en) * | 1973-07-30 | 1976-04-13 | Colgate-Palmolive Company | Apparatus for finishing soap bars |
US4127372A (en) * | 1974-05-03 | 1978-11-28 | Colgate-Palmolive Company | Apparatus for manufacturing marbled and striped soap |
US4574067A (en) * | 1985-03-01 | 1986-03-04 | Ball Corporation | Crosshead with static mixers |
US5125819A (en) * | 1987-11-24 | 1992-06-30 | Warner-Lambert Company | Apparatus for making center-filled chewing gum |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2199425A (en) * | 1937-11-16 | 1940-05-07 | Pincus Rothberg | Method and means for making capsules |
US2576444A (en) * | 1949-03-29 | 1951-11-27 | James C Clinefelter | Art of treating plastic materials such as rubber |
US2905365A (en) * | 1956-06-08 | 1959-09-22 | Thayer Scale Corp | Fluent material agitator |
US3183288A (en) * | 1961-12-21 | 1965-05-11 | Goodyear Tire & Rubber | Method for extruding |
US3285200A (en) * | 1964-06-29 | 1966-11-15 | Kellog Co | Processing equipment |
-
1970
- 1970-06-18 US US47360A patent/US3679336A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2199425A (en) * | 1937-11-16 | 1940-05-07 | Pincus Rothberg | Method and means for making capsules |
US2576444A (en) * | 1949-03-29 | 1951-11-27 | James C Clinefelter | Art of treating plastic materials such as rubber |
US2905365A (en) * | 1956-06-08 | 1959-09-22 | Thayer Scale Corp | Fluent material agitator |
US3183288A (en) * | 1961-12-21 | 1965-05-11 | Goodyear Tire & Rubber | Method for extruding |
US3285200A (en) * | 1964-06-29 | 1966-11-15 | Kellog Co | Processing equipment |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3950122A (en) * | 1973-07-30 | 1976-04-13 | Colgate-Palmolive Company | Apparatus for finishing soap bars |
US4127372A (en) * | 1974-05-03 | 1978-11-28 | Colgate-Palmolive Company | Apparatus for manufacturing marbled and striped soap |
US4574067A (en) * | 1985-03-01 | 1986-03-04 | Ball Corporation | Crosshead with static mixers |
US5125819A (en) * | 1987-11-24 | 1992-06-30 | Warner-Lambert Company | Apparatus for making center-filled chewing gum |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2120003A (en) | Dusting apparatus | |
US3679336A (en) | Dry lubricant coating of extruded tubing | |
DE3163873D1 (en) | Process and apparatus for forming ice confection products, and products formed thereby | |
NZ219682A (en) | Extruding smooth-bore pipes with external ribs | |
US5988461A (en) | Dry lube dispenser | |
GB1315661A (en) | Plastics extrusion process and apparatus | |
US3496605A (en) | Apparatus for extruding ribbed plastic pipe | |
US3122786A (en) | Apparatus for internally lining pipes | |
US2620515A (en) | Extrusion method and apparatus | |
US3579732A (en) | Dry lubricant coating of extruded tubing | |
US2889581A (en) | Method of extruding plastic material | |
US3065097A (en) | Method of dusting flexible film tubing internally | |
JP2011510846A (en) | Apparatus and method for lining an inner surface of an elongated member | |
JP2000326384A (en) | Intermittent extruder, intermittent extrusion method and production of catheter | |
MY106759A (en) | Apparatus for producing spiral pipes with rib | |
US3030623A (en) | Method for making blown rubber | |
US2351688A (en) | Extrusion apparatus | |
US1891744A (en) | Soap making | |
JP2922094B2 (en) | Release agent application mechanism | |
JPH05131526A (en) | Manufacture of resin pipe and molding die device for the pipe | |
IE37763B1 (en) | Large bore pipe made from thermoplastic synthetic materialparticularly for use underground and process and apparatus for manufacturing such a pipe | |
JP2500705B2 (en) | Method and apparatus for applying release agent to inner peripheral surface of rubber hose | |
GB705789A (en) | Improvement in extrusion of thermoplastic materials | |
SU143226A1 (en) | Method of making thermoplastic pipes | |
JPS5827101B2 (en) | Steel pipe coating method and equipment |