GB1361835A - Method of and apparatus for removing static charge from webs of material - Google Patents
Method of and apparatus for removing static charge from webs of materialInfo
- Publication number
- GB1361835A GB1361835A GB4166171A GB4166171A GB1361835A GB 1361835 A GB1361835 A GB 1361835A GB 4166171 A GB4166171 A GB 4166171A GB 4166171 A GB4166171 A GB 4166171A GB 1361835 A GB1361835 A GB 1361835A
- Authority
- GB
- United Kingdom
- Prior art keywords
- web
- wires
- corona
- counter
- electrode
- 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
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices
Landscapes
- Elimination Of Static Electricity (AREA)
Abstract
1361835 Discharging static electricity from webs of material KALLE AG 7 Sept 1971 [10 Sept 1970] 41661/71 Heading H1X A statically charged web of material is uniformly discharged to the extent of at least 99% of the original charge by bombardment, over the entire width of the web, under conditions having no deleterious effect on the said material, with charge carriers (i.e. gas ions and electrons) which are produced by a highfrequency A.C. voltage of 1 to 1000 Kcs/sec. and having a current intensity of between a few Á amp and several hundred Á amp/cm. of web width. Apparatus for performing the method in. cludes at least one corona wire having a thickness of less than 100 Á. Alternative wire arrangements described comprise:- a single wire mounted adjacent an earthed counter-electrode (Fig. 1, not shown); a plurality of wires secured by tensioning springs to a rectangular frame (Fig. 2, not shown) with additional transverse supporting strips, if necessary (Fig. 4, not shown) and an optional protective grid (Fig. 6, not shown); a single wire wound zig-zag around supports on a frame and tensioned by a single spring (Fig. 3, not shown); a plurality of tensioned wires staggered in relation to each other to enable the width of the web to be covered by shorter wires (Fig. 5, not shown). The wires may be mounted in channels of rectangular or semicircular cross-section in a protective member (Figs. 7 and 8, not shown) which may form a counter-electrode, a lining of synthetic film being fitted between the corona wires and the interior of the protective elements. In the arrangement shown the web 7 is passed over a roll consisting of rods 18 enclosing corona wires 5 which preferably rotate with the roll but may alternatively be stationary in which case they need only be provided along the looping arc of the web 7 (Fig. 10, not shown). A curved counter-electrode consists of a protective element 14 with a number of corona wires 5. An arrangement for discharging both sides of the web comprises four rolls with curved counterelectrodes arranged alternately on opposite sides (Fig. 11, not shown). The charge carriers are normally produced in air, but may be produced in an inert gas which may be heated.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7238535A FR2159925A5 (en) | 1971-09-07 | 1972-10-31 | Isostatic compression moulding machine - with mobile easily dismounted moulds which move through a number of work stations |
SE7214081A SE390496B (en) | 1971-09-07 | 1972-10-31 | DEVICE FOR ISSTATICALLY PRESSING PARTICULAR MATERIAL FOR A CONNECTED BODY |
IT7253742A IT973348B (en) | 1971-09-07 | 1972-10-31 | DEVICE FOR THE ISOSTATIC COMPRESSION OF MATERIALS IN PARTICLE FORM TO OBTAIN BODIES WITH DISCRETE PATTI |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702044828 DE2044828C (en) | 1970-09-10 | Method and device for unloading material webs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1361835A true GB1361835A (en) | 1974-07-30 |
Family
ID=5782091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4166171A Expired GB1361835A (en) | 1970-09-10 | 1971-09-07 | Method of and apparatus for removing static charge from webs of material |
Country Status (7)
Country | Link |
---|---|
US (1) | US3790854A (en) |
BE (1) | BE772316A (en) |
CA (1) | CA942374A (en) |
FR (1) | FR2106420B1 (en) |
GB (1) | GB1361835A (en) |
LU (1) | LU63884A1 (en) |
NL (1) | NL7111963A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2399874A1 (en) * | 1977-08-10 | 1979-03-09 | Continental Group | ELECTROSTATIC CHARGING DEVICE FOR COATING THE ENDS OF METAL BOXES |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027201A (en) * | 1975-10-06 | 1977-05-31 | International Business Machines Corporation | Apparatus and method for neutralizing static charges in sheet/web feeding devices |
DE2556228A1 (en) * | 1975-12-13 | 1977-06-16 | Hoechst Ag | CORONA DEVICE |
US4064548A (en) * | 1976-01-27 | 1977-12-20 | Burlington Industries, Inc. | Means for improving ionization efficiency of high-voltage grid systems |
DE2643772C2 (en) * | 1976-09-29 | 1985-01-17 | Hoechst Ag, 6230 Frankfurt | Corona facility |
USRE31382E (en) * | 1977-03-10 | 1983-09-13 | E. I. Du Pont De Nemours And Company | Static charge neutralizer and process |
US4110810A (en) * | 1977-03-10 | 1978-08-29 | E. I. Du Pont De Nemours And Company | Static charge neutralizer and process |
US4130852A (en) * | 1977-07-29 | 1978-12-19 | Eastman Kodak Company | Grounded grid static discharge apparatus |
GB2040594B (en) * | 1978-11-23 | 1982-12-22 | Payne J M | Device for electrostatically charging sheet material |
JPS614082A (en) * | 1984-06-18 | 1986-01-09 | Canon Inc | Corona discharging device |
JPH0982486A (en) * | 1995-09-07 | 1997-03-28 | Fuji Photo Film Co Ltd | Static eliminating device for web |
US6368675B1 (en) | 2000-04-06 | 2002-04-09 | 3M Innovative Properties Company | Electrostatically assisted coating method and apparatus with focused electrode field |
US6475572B2 (en) | 2000-04-06 | 2002-11-05 | 3M Innovative Properties Company | Electrostatically assisted coating method with focused web-borne charges |
US20090080956A1 (en) * | 2007-09-26 | 2009-03-26 | Montfort David B | In-line printing media treatment for printing on non-paper printing media and thick printing media |
CN109563662B (en) | 2016-08-02 | 2020-08-28 | 博爱德国有限公司 | System and method for making polylactic acid nonwoven fabrics |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US844300A (en) * | 1906-02-12 | 1907-02-12 | Chapman Electric Neutralizer Company | Process of neutralizing static electricity. |
US2867912A (en) * | 1956-05-11 | 1959-01-13 | Horace Dawson | Method for the decontamination of metal foils |
US2879396A (en) * | 1957-05-03 | 1959-03-24 | Plastics-treating apparatus | |
GB1100414A (en) * | 1964-05-19 | 1968-01-24 | Ici Ltd | Treatment of plastics surfaces with an electrical discharge to improve their bonding properties |
FR2088816A5 (en) * | 1969-06-03 | 1972-01-07 | Progil |
-
1971
- 1971-08-31 NL NL7111963A patent/NL7111963A/xx not_active Application Discontinuation
- 1971-09-07 GB GB4166171A patent/GB1361835A/en not_active Expired
- 1971-09-07 US US00178313A patent/US3790854A/en not_active Expired - Lifetime
- 1971-09-07 BE BE772316A patent/BE772316A/en unknown
- 1971-09-08 FR FR717132362A patent/FR2106420B1/fr not_active Expired
- 1971-09-08 CA CA122,297A patent/CA942374A/en not_active Expired
- 1971-09-09 LU LU63884A patent/LU63884A1/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2399874A1 (en) * | 1977-08-10 | 1979-03-09 | Continental Group | ELECTROSTATIC CHARGING DEVICE FOR COATING THE ENDS OF METAL BOXES |
Also Published As
Publication number | Publication date |
---|---|
DE2044828B2 (en) | 1972-12-14 |
CA942374A (en) | 1974-02-19 |
NL7111963A (en) | 1972-03-14 |
US3790854A (en) | 1974-02-05 |
DE2044828A1 (en) | 1972-04-06 |
BE772316A (en) | 1972-03-07 |
LU63884A1 (en) | 1973-03-09 |
FR2106420A1 (en) | 1972-05-05 |
FR2106420B1 (en) | 1973-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |