FR2292560A1 - Perforating endless lengths of material by electrical discharges - fibrous webs, expanded films etc, pass between rotary electrodes - Google Patents

Perforating endless lengths of material by electrical discharges - fibrous webs, expanded films etc, pass between rotary electrodes

Info

Publication number
FR2292560A1
FR2292560A1 FR7536128A FR7536128A FR2292560A1 FR 2292560 A1 FR2292560 A1 FR 2292560A1 FR 7536128 A FR7536128 A FR 7536128A FR 7536128 A FR7536128 A FR 7536128A FR 2292560 A1 FR2292560 A1 FR 2292560A1
Authority
FR
France
Prior art keywords
electrode
electrical discharges
fibrous webs
perforating
pass
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.)
Granted
Application number
FR7536128A
Other languages
French (fr)
Other versions
FR2292560B3 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BXL Plastics Ltd
Original Assignee
Bakelite Xylonite Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bakelite Xylonite Ltd filed Critical Bakelite Xylonite Ltd
Publication of FR2292560A1 publication Critical patent/FR2292560A1/en
Application granted granted Critical
Publication of FR2292560B3 publication Critical patent/FR2292560B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B26F1/28—Perforating by non-mechanical means, e.g. by fluid jet by electrical discharges

Abstract

Continuous lengths of matl. ranging from fibrous webs and paper to polymer films or sheets, ready formed, possibly expanded into a cellular structure or extruded and stretched from a mixt. of a linear polymer with an expanding agent, fed directly from the extruder, are perforated by electrical discharges. The run is passed through an electrode system consisting of a first and second electrode between which there is a high frequency potential difference. Electrical discharges take place between the points of the first and second electrode which are in the closest proximations. At least one electrode is rotated and is formed so that a zone on its surface which at any monent is closest to the surface of the other electrode, approaches in a direction having a component parallel to the axis of rotation. Severe corrosion of the electrodes causing irregularities of the pattern, are avoided. The gap between the electrodes does not allow energy to be absorbed but is adequate for the passage of the goods without possibility of damage.
FR7536128A 1974-11-26 1975-11-26 Perforating endless lengths of material by electrical discharges - fibrous webs, expanded films etc, pass between rotary electrodes Granted FR2292560A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5123774 1974-11-26

Publications (2)

Publication Number Publication Date
FR2292560A1 true FR2292560A1 (en) 1976-06-25
FR2292560B3 FR2292560B3 (en) 1979-06-15

Family

ID=10459197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7536128A Granted FR2292560A1 (en) 1974-11-26 1975-11-26 Perforating endless lengths of material by electrical discharges - fibrous webs, expanded films etc, pass between rotary electrodes

Country Status (4)

Country Link
JP (1) JPS5177997A (en)
AU (1) AU8699075A (en)
DE (1) DE2552919A1 (en)
FR (1) FR2292560A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036630A1 (en) * 1980-03-25 1981-09-30 Softal Elektronik Erik Blumenfeld KG Apparatus and method for perforating paper, in particular paper for cigarettes
US20110309544A1 (en) * 2010-06-21 2011-12-22 Matthew Todd Hupp Method for providing a web with unique perforations
US8268429B2 (en) 2010-06-21 2012-09-18 The Procter & Gamble Company Perforated web product
US8283013B2 (en) 2010-06-21 2012-10-09 The Procter & Gamble Company Uniquely perforated web product
US8287977B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8287976B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8443725B2 (en) 2010-06-21 2013-05-21 The Procter & Gamble Company Method of perforating a web
US8468938B2 (en) 2010-06-21 2013-06-25 The Procter & Gamble Company Apparatus for perforating a web material
US8535483B2 (en) 2010-06-21 2013-09-17 The Procter & Gamble Company Apparatus for uniquely perforating a web material
US8757058B2 (en) 2010-06-21 2014-06-24 The Procter & Gamble Company Process for perforating a web
US8763526B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Apparatus for perforating a web material
US8763523B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Method of perforating a web material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029234A (en) * 1983-07-11 1985-02-14 Mitsubishi Electric Corp Wire electrode for wire cut electrical discharge machining
JP2529811B2 (en) * 1993-07-28 1996-09-04 栄電子工業株式会社 Small-diameter hole drilling apparatus and small-diameter hole drilling method using the same

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036630A1 (en) * 1980-03-25 1981-09-30 Softal Elektronik Erik Blumenfeld KG Apparatus and method for perforating paper, in particular paper for cigarettes
US20110309544A1 (en) * 2010-06-21 2011-12-22 Matthew Todd Hupp Method for providing a web with unique perforations
US8268429B2 (en) 2010-06-21 2012-09-18 The Procter & Gamble Company Perforated web product
US8283013B2 (en) 2010-06-21 2012-10-09 The Procter & Gamble Company Uniquely perforated web product
US8287977B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8287976B2 (en) 2010-06-21 2012-10-16 The Procter & Gamble Company Uniquely perforated web product
US8443725B2 (en) 2010-06-21 2013-05-21 The Procter & Gamble Company Method of perforating a web
US8468938B2 (en) 2010-06-21 2013-06-25 The Procter & Gamble Company Apparatus for perforating a web material
US8535483B2 (en) 2010-06-21 2013-09-17 The Procter & Gamble Company Apparatus for uniquely perforating a web material
US8757058B2 (en) 2010-06-21 2014-06-24 The Procter & Gamble Company Process for perforating a web
US8763526B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Apparatus for perforating a web material
US8763523B2 (en) 2010-06-21 2014-07-01 The Procter & Gamble Company Method of perforating a web material
US9259848B2 (en) 2010-06-21 2016-02-16 The Procter & Gamble Company Method for providing a web with unique lines of weakness

Also Published As

Publication number Publication date
DE2552919A1 (en) 1976-06-10
AU8699075A (en) 1977-06-02
FR2292560B3 (en) 1979-06-15
JPS5177997A (en) 1976-07-06

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Legal Events

Date Code Title Description
ST Notification of lapse