AU614665B2 - Creación de Inventos y Patentes con Inteligencia Artificial

AU614665B2 – Apparatus for partially slitting absorbent boards
– Google Patents

AU614665B2 – Apparatus for partially slitting absorbent boards
– Google Patents
Apparatus for partially slitting absorbent boards

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Publication number
AU614665B2

AU614665B2
AU41325/89A
AU4132589A
AU614665B2
AU 614665 B2
AU614665 B2
AU 614665B2
AU 41325/89 A
AU41325/89 A
AU 41325/89A
AU 4132589 A
AU4132589 A
AU 4132589A
AU 614665 B2
AU614665 B2
AU 614665B2
Authority
AU
Australia
Prior art keywords
board
rolls
roll
absorbent
teeth
Prior art date
1988-09-12
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

Application number
AU41325/89A
Other versions

AU4132589A
(en

Inventor
Jean-Marc Believeau
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.)

Johnson and Johnson Inc

Original Assignee
Johnson and Johnson Inc
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.)
1988-09-12
Filing date
1989-09-12
Publication date
1991-09-05

1989-09-12
Application filed by Johnson and Johnson Inc
filed
Critical
Johnson and Johnson Inc

1990-03-15
Publication of AU4132589A
publication
Critical
patent/AU4132589A/en

1991-09-05
Application granted
granted
Critical

1991-09-05
Publication of AU614665B2
publication
Critical
patent/AU614665B2/en

1992-01-23
Assigned to JOHNSON & JOHNSON INC.
reassignment
JOHNSON & JOHNSON INC.
Alteration of Name(s) of Applicant(s) under S113
Assignors: MCNEIL-PPC, INC.

2009-09-12
Anticipated expiration
legal-status
Critical

Status
Expired
legal-status
Critical
Current

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Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B26—HAND CUTTING TOOLS; CUTTING; SEVERING

B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING

B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor

B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising

A—HUMAN NECESSITIES

A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE

A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS

A61F13/00—Bandages or dressings; Absorbent pads

A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators

A61F13/15577—Apparatus or processes for manufacturing

A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping

A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing

B—PERFORMING OPERATIONS; TRANSPORTING

B26—HAND CUTTING TOOLS; CUTTING; SEVERING

B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING

B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor

B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work

B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis

B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter

B26D1/24—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter

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

B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material

B26F1/22—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material to form non-rectilinear cuts, e.g. for tabs

B—PERFORMING OPERATIONS; TRANSPORTING

B26—HAND CUTTING TOOLS; CUTTING; SEVERING

B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING

B26F3/00—Severing by means other than cutting; Apparatus therefor

B26F3/04—Severing by squeezing

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T225/00—Severing by tearing or breaking

Y10T225/30—Breaking or tearing apparatus

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T225/00—Severing by tearing or breaking

Y10T225/30—Breaking or tearing apparatus

Y10T225/329—Plural breakers

Description

11111111114.ii1 .1 i.i COMMONWEALTH OF AUSTRALI6 1 4 6 6 PATENTS ACT 1952 Form COMPLETE SPECIFICATION FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art:
.B
TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: McNEIL-PPC, ING. -Hlc iA DV U Van Liew Avenue, Milltown, NEW JERSEY, PFU’,, L 1 Pl^ »/OO+¢oiu Sj hC L CCF^ i Jean-Marc Beliveau GRIFFITH HACK CO. 71 YORK STREET SYDNEY NSW 2000 AUSTRALIA
N
Complete Specification for the invention entitled: APPARATUS FOR PARTIALLY SLITTING ABSORBENT BOARDS The following statement is a full description of this invention, including the best method of performing it known to me/us:- 6864A:rk I i -lA- APPARATUS FOR PARTIALLY SLITTING ABSORBENT BOARDS Field of the Invention This invention relates to apparatus useful in modifying absorbent material for products such as sanitary napkins, diapers, tampons and the like, and more particularly in partially slitting an absorbent board to provide flexibility to the board while maintaining a unitary product.
Background of the Invention Absorbent materials in the form of relatively dense sheet-like structures resembling heavy weight paper, blotter paper or paperboard are referred to as absorbent boards. This terminology distinguishes such absorbents from loose, bulky materials such as wood pulp, fluff and the like. Absorbent boards may be formed of a variety of materials of natural and/or synthetic origin. For example, absorbent boards may be prepared from wood pulp, peat moss and mixtures thereof, optionally including other components such as reinforcing synthetic textile fibers, natural fibers, binders, surfactants and the like. Such boards are commonly prepared by wet laying a slurry of the solid components of the board on conventional papermaking equipment.
For example, U.S. 4,507,122 discloses a laminate structure comprising a thin layer of kraft paper and a heavier layer &J-126 7 2 of a mixture of peat moss and wood pulp. The materials are sequentially deposited from an aqueous slurry in a wet process on conventional paper making equipment. The deposit solids are dewatered, partially dried and compressed to a density from about 0.2 to 1.0 g/cc. The resulting absorbent board is relatively stiff, and flexibility may be increased by mechanical working such as embossing microcreping or micro-corrugating. The reference suggests that the flexibility of the board may also be increased by slitting.
The present invention is concerned with a novel apparatus for improvement of an absorbent structure composed of peat moss, wood pulp, mixtures thereof or other compacted friable absorbent material. The apparatus provides increased flexibility in at least one direction to absorbent boards.
Summary of the Invention o 0 ooo According to a first aspect, the present invention provides o 0 0 20 an apparatus for partially slitting an absorbent board comprising: c0oc a pair of spaced parallel rolls having longitudinal axes, mounted for rotation about said axes; circumferential surfaces on each of said rolls which mate width the circumferential surface of the other roll to form a nip between said rolls; means for rotating said rolls to pull said absorbent board through said nip; slitting means on said circumferential surfaces which displace portions of said absorbent board at least partially out of the plane of said board as said rolls rotate to move said board through said nip, said slitting means including: a plurality of circumferential teeth on each roll with the teeth on one of the rolls being offset from similar teeth on the other roll in said pair of rolls, said teeth having a pair of surfaces A /SI..
~~~/KLS/11.06.91 r 3 0o o o ao 0 o 0 c, o eesa oe 00 forming a circumferential apex which displaces a portion of the absorbent board in a direction away from the axis of the roll as an adjacent tooth on the other roll prevents movement of an adjacent portion of the absorbent board in the same direction, partially tearing a slit between the two adjacent portions, a first of said pair of surfaces being perpendicular to the axis of the roll and the second surface forms an angle of less than 90′ with the axis; and (ii) a flat longitudinal surface extending between said two circumferentially extending surfaces at a point radially below the apexes of the teeth formed in part by the surfaces which said flat longitudinal surface extends between.
In a second aspect, the present invention provides an apparatus for partially slitting an absorbent board made from a mixture of short and long fibres comprising: 20 a pair of spaced parallel rolls having longitudina axes mounted for rotation about said axes; circumferential surfaces on each of said rolls which mate with the circumferential surfaces of the other roll to form a nip between said rolls; -slitting means on said circumferential surfaces which displace portions of said absorbent board and at least partially out of the plane of said board to tear the short fibres of the board as said rolls rotate to move said board through said nip and having a gap large enough to permit passage of long fibres without severing all of the long fibres, said slitting means comprising: a plurality of circumferential teeth on each roll with the teeth on one of the rolls being offset from similar teeth on the other roll in said pair of rolls, said teeth having a pair of surfaces forming a circumferential apex which displaces a 20S/KLS/11.06.91 3oportion of the absorbent board in a direction away from the axis of the roll as an adjacent tooth on the other roll prevents movement of an adjacent portion of the absorbent board in the same direction, partially tearing a slit between the two adjacent portions; (ii) each of said teeth is shaped with two circumferentially extending surfaces which meet to form the apex, a first surface is perpendicular to the axis of the roll and the second surface forms an angle of less than 90′ with the axis; (iii) a flat longitudinal surface extending between said two circumferentially extending surfaces at a point radially below the apexes of the teeth formed in part by the surfaces which said flat longitudinal surface extends between; and means for rotating said rolls to pull said o0 absorbent board through said nip.
In order to prevent the absorbent board from wrapping around S one of the rolls, a pair of doctor blades may be provided.
son The doctor blades each have a leading edge which is disposed close to the surface of one or the other of the rolls. The edge can be shaped to fit the roll and closely follow its surface. The doctor blades extend at an acute angle to the plane of the absorbent board at the point where the board exits the nip of the roll.
The absorbent structure fed into the apparatus is preferably composed of peat moss and is formed as a board by air or wet laying and calendering to obtain a relatively thin, ie. from about 0.01 to 0.05 inch thick, relatively dense, ie. from about 0.2 to 1.0 g/cc sheet-like structure. The structure may include a layer of kraft tissue laminated on one or both surfaces of the peat moss layer. The absorbent board thus formed is a 1.06.91 -4relatively thin but stiff structure similar to those described in the above-described reference.
As used herein «partially slit» means to cut, separate or tear the short fibers of the peat moss or wood pulp while leaving intact a number of longer staple fibers. The fibers which remain intact, bridge the slit formed by the cutting, separating or tearing of the structure to provide integrity to the unit.
Brief Description of the Drawings The apparatus will now be described in detail with reference to the accompanying figures wherein: FIGURE 1 is a partial perspective view of the apparatus of the invention; FIGURE 2 is a perspective view of an absorbent board after slitting by the apparatus; FIGURE 3 is an enlarged view of a portion of the slit absorbent board with adjacent board portions pulled apart; FIGURE 4 is a cross-sectional view of FIGURE 3 along line 4-4; FIGURE 5 is a partial end view of the nip of the rolls of one embodiment of the invention; FIGURE 6 is an enlarged view of the nip of FIGURE FIGURE 7 is a partial end view of the nip of the rolls of an alternate embodiment of the invention; J&J-1267 1 -4relatively thin but stiff structure similar to those described in the above-described reference.
As used herein «partially slit» means to cut, separate or tear the short fibers of the peat moss or wood pulp while leaving intact a number of longer staple fibers. The fibers which remain intact, bridge the slit formed by the cutting, separating or tearing of the structure to provide integrity to the unit.
B3rief Description of the Drawings The apparatus will now be described in detail with reference to the accompanying figures wherein: FIGURE 1 is a partial perspective view of the apparatus of the invention; FIGURE 2 is a perspective view of an absorbent board after slitting by the apparatus; FIGURE 3 is an enlarged view of a portion of the slit absorbent board with adjacent board portions pulled apart; FIGURE 4 is a cross-sectional view of FIGURE 3 along line 4-4; FIGURE 5 is a partial end view of the nip of the rolls of one embodiment of the invention; FIGURE 6 is an enlarged view of the nip of FIGURE FIGURE 7 is a partial end view of the nip of the rolls of an alternate embodiment of the invention; J&J-1267 FIGURE 8 is a partial top elevation of the rolls and doctor blade; and FIGURE 9 is a cross-section along line 9-9 of FIGURE 8.
Detailed Description of the Invention Referring now to FIG. 1, a pair of spaced rolls 10,11 are positioned with their longitudinal axes parallel to each other. The rolls are driven in opposite directions as indicated by arrows X. The rolls may be driven in any suitable manner, for example, an electric motor 12 may drive an endless belt 13. The belt 13 travels a serpentine path about pulleys 14 to provide the opposite rotation of the rolls. Alternatively, the belt 13 may be replaced by a chain which drives sprockets to rotate the rolls.
An absorbent board 15 is fed into the nip 16 of rolls 10,11. The board 15 may have spaced embossments 17 extending transversely of board 15. Embossments 17 provide additional flexibility to the board about an axis parallel to the embossments 17 after slitting, a pair of doctor blades 18 assists the removal of the slit board from the nip 16.
After treatment by the rolls 10,11, the board 15 appears as shown in FIG. 2. The board has slits 19 extending longitudinally through the board. The slits 19 partially separate strip-like portions 20. As seen more clearly in FIG. 3, the strip-like portions are interconnected by longer fibers 21 in the board. In FIGS. 3 and 4, the slit 19 is shown in a condition in which adjacent strip-like portions 20a, 20b are pulled apart. The strip-like portions are substantially discrete sections. However, in ‘&J-1267 i -6order to maintain the integrity of the board, fibers 21 extend between adjacent strip-like portions to interconnect them. In cross-section, the slitted board has a saw-toothed desin. The adjacent strip-like portions having been shifted vertically to create the slits without cutting the long fibers which interconnect the adjacent strip-like portions 20a,20b. However, this saw-toothed design is merely a function of the tooth shape and is not necessarily the shape of the final product.
o 0 *r 4r 0 *4a In order to create the slits 19, the rolls 10,11 are provided with an outer circumferential surface as shown in FIG. 5. The surface has circumferential teeth 22 which each form an apex 23 at the juncture of sloped surface 24 and perpendicular surface 25. However, in the preferred embodiment, the teeth have flat lands 23a. The rolls 10,11 have substantially the same tooth shape. However, the rolls are positioned with their axes parallel but extending in opposite directions so the teeth mate longitudinally in a spaced configuration (FIG. Thus, the teeth define a plurality of saw-toothed pockets for the board to pass through.
Perpendicular surface 25 extends substantially perpendicular to the axis of rotation of the rolls. The sloped surface 24, however, forms an angle m with the roll axis. This angle may be approximately 300. The rolls are preferably positioned so the apex or the flat of the teeth of one roll extend slightly past the plane of the apex or flat of the teeth of the other roll. That is, the separation dimension D in the range of 0.01 inch to minus 0.006 inch. This range is for a 300 g/m 2 basis weight peat moss board. Different dimensions may be I&J-1267 -7necessary for other products. For thick products, the dimension may even be positive.
The dimensions of the teeth will now be described with respect to slitting a peat moss board having a thickness of about 0.02-0.10 inches. The board has long fibers or fibrous components which are preferably a synthetic fiber such as polyester fiber having a denier of from 1 to 5 and staple length of from 0.5 to 1.5 inches. The polyester fiber is blended with the peat moss and/or wood pulp to form a uniform mixture before forming the board. The polyester fiber is preferably added in an amount equal to from 2 to 20% by weight of the dry components of the absorbent board, and most preferably in an amount from about 4 to 8% by weight. The board has a final thickness of approximately .015 inch if calendered and about .038 inch if microcreped.
The rolls are preferably about two inches in diameter and are positioned so adjacent perpendicular faces are 4 separated by 0.002 inch (dimension The teeth have a height B of approximately 0.036 inch and a tooth length E of approximately 0.080 inch. These dimensions change 4, depending on the board being slit. Dimension is generally greater than the size of the long fibers plus 0.0015 inch, The embodiment shown in FIGS. 5 and 6 has flat lands 26 which permit a wider distance between slits without greatly disturbing the tooth dimensions. The lands 26 Smate with flats 23a of the opposing roll to give support to adjacent board portions as the slit is formed. The lands 26 may be eliminated as in FIG. 7 in which case J&J-1267
I?
000 0 o a oo oO o 4 0 0 0 00 0 -8rolls having the dimensions described above would have a tooth length of 0.063 inch.
In order to guide the slit board out of the roller nip 16, a pair of doctor blades 27,28 are provided. The doctor blades have a leading edge 29 which closely follows the surface shape of the rolls. The lower blade 27 forms an angle 01, of 50 with the plane of the material. The upper blade 28 forms an angle 02 of 150 with the plane of the material.
In operation, an absorbent board 15 is fed into the nip 16 of the rolls 10,11. In the nip, adjacent board portions are separated by sloped surface 24 pushing one edge of the portion 20a in one direction out of the plane of the board while the sloped surface of an adjacent tooth on the opposite roll pushes the adjacent edge of the adjacent portion 20b in the opposite direction out of the plane of the board. Thus, each adjacent portion is twisted slightly in the same direction, tearing open the slits.
The gap between the teeth of opposing rolls, however, permits the long fibers to pass unsevered. The board may stick to the roll’s surface or may delaminate if the board is not guided off the roll surface. Therefore, the doctor blades gently guide the board off the rolls and direct it for further processing.
The invention has been described with reference to its preferred embodiment and preferred board construction.
However, variations to this embodiment may be made while remaining within the spirit of the invention.
J&J-1267

Claims (5)

2. An apparatus for partially slitting an absorbent board made from a mixture of short and long fibres comprising: a pair of spaced parallel rolls having longitudinal axes mounted for rotation about said axes; circumferential surfaces on each of said rolls which mate with the circumferential surfaces of the other roll to form a nip between said rolls; slitting means on said circumferential surfaces which displace portions of said absorbent board and at least partially out of the plane of said board to tear the short fibres of the board as said rolls rotate to move said board through said nip and having a gap large enough to permit passage of long fibres without severing all of the long fibres, said slitting means comprising: a plurality of circumferential teeth on Q neach roll with the teeth on one of the rolls being o offset from similar teeth on the other roll in said pair of rolls, said teeth having a pair of surfaces forming a circumferential apex which displaces a portion of the absorbent board in a direction away ~from the axis of the roll as an adjacent tooth on the other roll prevents movement of an adjacent portion of the absorbent board in the same direction, partially tearing a slit between the two adjacent portions; (ii) each of said teeth is shaped with two circumferentially extending surfaces which meet to form the apex, a first surface is perpendicular to the axis of the roll and the second surface forms an angle of less than 90 with the axis; (iii) a flat longitudinal surface extending between said two circumferentially extending surfaces at a point radially below the apexes of the teeth formed in part by the surfaces which said flat longitudinal surface extends between; and means for rotating said rolls to pull said P Llq absorbent board through said nip. S8 20S/KLS/11.06.91 11

3. The apparatus according to claim 1 or claim 2 further comprising at least one doctor blade on one side of the nip to guide the at least partially slit absorbent board off the rolls.

4. The apparatus according to claim 3, wherein there are two doctor blades and each is disposed adjacent a different roll.

5. The apparatus according to claim 4, wherein the doctor blades each have a leading edge which is shaped to follow the outer surface of its roll.

6. The apparatus according to claim 5 wherein the doctor blades extend at an acute angle to the partially slit absorbent board when the board exits the nip of the rolls. o 7. An apparatus for partially slitting an absorbent board substantially as herein described with reference to the accompanying drawings. DATED this 12th day of June 1991 MCNEIL-PPC, INC By their Patent Attorneys GRIFFITH HACK CO OS/KLS/11.06.91

AU41325/89A
1988-09-12
1989-09-12
Apparatus for partially slitting absorbent boards

Expired

AU614665B2
(en)

Applications Claiming Priority (2)

Application Number
Priority Date
Filing Date
Title

US07/242,274

US5038989A
(en)

1988-09-12
1988-09-12
Apparatus for partially slitting absorbent boards

US242274

1988-09-12

Publications (2)

Publication Number
Publication Date

AU4132589A

AU4132589A
(en)

1990-03-15

AU614665B2
true

AU614665B2
(en)

1991-09-05

Family
ID=22914146
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

AU41325/89A
Expired

AU614665B2
(en)

1988-09-12
1989-09-12
Apparatus for partially slitting absorbent boards

Country Status (19)

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Link

US
(1)

US5038989A
(en)

EP
(1)

EP0360472B1
(en)

JP
(1)

JPH02243144A
(en)

CN
(1)

CN1020849C
(en)

AR
(1)

AR244075A1
(en)

AT
(1)

ATE113822T1
(en)

AU
(1)

AU614665B2
(en)

BR
(1)

BR8904597A
(en)

CA
(1)

CA1310480C
(en)

DE
(1)

DE68919314T2
(en)

ES
(1)

ES2066858T3
(en)

GR
(1)

GR1000742B
(en)

IE
(1)

IE66104B1
(en)

IN
(1)

IN170973B
(en)

MY
(1)

MY103774A
(en)

NZ
(1)

NZ230626A
(en)

PH
(1)

PH26598A
(en)

ZA
(1)

ZA896952B
(en)

ZW
(1)

ZW11189A1
(en)

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DE1938234A1
(en)

1968-08-05
1970-02-12
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Perforation method

US3577724A
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1969-01-27
1971-05-04
Phillips Petroleum Co
Method of fibrillating and twisting oriented film

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(en)

1970-06-09
1972-07-25
Monsanto Chemicals
Apparatus for the production of fibrous materials

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1974-10-30
1976-02-24
Monsanto Company
Wire extractor

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1979-12-03
1984-07-17
Beloit Corporation
Non-contacting slitter

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(en)

1985-06-26
1987-01-13
Teepak, Inc.
Methods and apparatus for perforating food casing film and casing produced thereby

1988

1988-09-12
US
US07/242,274
patent/US5038989A/en
not_active
Expired – Lifetime

1988-09-23
MY
MYPI88001065A
patent/MY103774A/en
unknown

1988-09-23
IN
IN796/CAL/88A
patent/IN170973B/en
unknown

1989

1989-09-11
DE
DE68919314T
patent/DE68919314T2/en
not_active
Expired – Lifetime

1989-09-11
ES
ES89309197T
patent/ES2066858T3/en
not_active
Expired – Lifetime

1989-09-11
IE
IE289989A
patent/IE66104B1/en
not_active
IP Right Cessation

1989-09-11
AT
AT89309197T
patent/ATE113822T1/en
not_active
IP Right Cessation

1989-09-11
EP
EP89309197A
patent/EP0360472B1/en
not_active
Expired – Lifetime

1989-09-11
ZW
ZW111/89A
patent/ZW11189A1/en
unknown

1989-09-11
CA
CA000610967A
patent/CA1310480C/en
not_active
Expired – Lifetime

1989-09-12
BR
BR898904597A
patent/BR8904597A/en
not_active
IP Right Cessation

1989-09-12
GR
GR890100578A
patent/GR1000742B/en
not_active
IP Right Cessation

1989-09-12
PH
PH39222A
patent/PH26598A/en
unknown

1989-09-12
AU
AU41325/89A
patent/AU614665B2/en
not_active
Expired

1989-09-12
CN
CN89108000A
patent/CN1020849C/en
not_active
Expired – Lifetime

1989-09-12
JP
JP1236806A
patent/JPH02243144A/en
active
Pending

1989-09-12
ZA
ZA896952A
patent/ZA896952B/en
unknown

1989-09-12
AR
AR89314912A
patent/AR244075A1/en
active

1989-09-12
NZ
NZ230626A
patent/NZ230626A/en
unknown

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1971-04-27
1975-02-25
Scott Paper Co
Absorbent pad and method for making same

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(en)

1972-01-05
1976-03-24
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Method and apparatus for the treatment of flexible sheets

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(en)

1973-09-21
1976-01-22
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Slitting and scoring apparatus

Also Published As

Publication number
Publication date

AR244075A1
(en)

1993-10-29

NZ230626A
(en)

1992-06-25

EP0360472A3
(en)

1991-01-16

ZA896952B
(en)

1991-05-29

EP0360472B1
(en)

1994-11-09

DE68919314D1
(en)

1994-12-15

IN170973B
(en)

1992-06-27

ZW11189A1
(en)

1991-06-12

EP0360472A2
(en)

1990-03-28

GR890100578A
(en)

1990-10-31

PH26598A
(en)

1992-08-19

BR8904597A
(en)

1990-04-24

ATE113822T1
(en)

1994-11-15

GR1000742B
(en)

1992-12-30

IE66104B1
(en)

1995-12-13

DE68919314T2
(en)

1995-04-06

US5038989A
(en)

1991-08-13

JPH02243144A
(en)

1990-09-27

CN1041127A
(en)

1990-04-11

CA1310480C
(en)

1992-11-24

MY103774A
(en)

1993-09-30

CN1020849C
(en)

1993-05-26

IE892899L
(en)

1990-03-12

AU4132589A
(en)

1990-03-15

ES2066858T3
(en)

1995-03-16

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