US3869950A - Apparatus for transverse cutting or perforating a continuously advancing web - Google Patents

Apparatus for transverse cutting or perforating a continuously advancing web Download PDF

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Publication number
US3869950A
US3869950A US33865973A US3869950A US 3869950 A US3869950 A US 3869950A US 33865973 A US33865973 A US 33865973A US 3869950 A US3869950 A US 3869950A
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US
United States
Prior art keywords
counterblade
cutting edge
blade
rotation
axis
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
Application number
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English (en)
Inventor
Arthur Bienvenu Dalla Serra
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.)
HERVE FILS PAPET SENTIER
HERVE AND FILS PAPETERIES DU SENTIER SA Ste
Original Assignee
HERVE FILS PAPET SENTIER
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
Priority claimed from FR7207826A external-priority patent/FR2175268A6/fr
Priority claimed from FR7305792A external-priority patent/FR2218743A6/fr
Application filed by HERVE FILS PAPET SENTIER filed Critical HERVE FILS PAPET SENTIER
Application granted granted Critical
Publication of US3869950A publication Critical patent/US3869950A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B26D1/25—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 non-circular cutting member
    • B26D1/34—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 non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—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 non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • B26D1/385—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 non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
    • 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
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4824—With means to cause progressive transverse cutting
    • 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
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4847—With cooperating stationary tool

Definitions

  • the invention concerns an apparatus permitting the severing or the making of detachable perforations on a continuously advancing web or strip. It is also to be understood that the invention contemplates the cutting and piercing of stacks of material. In the specification, the word cut will have the meaning cut or detachable perforations.
  • the elasticity of the steel blade permits the application of certain elastic deformations by stress at the moment of the shearing, without causing inconvenience.
  • the permissible limits of such deformations are, of course, very small near the points of fixation or attachment points, and attain their maximum value at the midpoint between two successive attachment points. It is clear that the deformations of the two blades are additive when these blades cross each other forcibly.
  • the very structure of the frame supporting the rotating blade is susceptible of elastic deformations and, further still, the rotational axis of such rotating blade is mounted in its bearings with necessary and non-negligible mechanical tolerances.
  • the stress be essentially zero at the moment when the rotating blade leaves the fixed blade, that is to say, at that end of this fixed blade which is opposite the last point of engagement. Since these considerations have been duly verified by a large number of tests, it is possible to construct a rotating cutting apparatus of simpler form, whose particular construction permits the solution of problems in format changes, that is to say, in the variation of the spacing of the cut.
  • One of the objects of the present invention is, therefore, to specify a rotating cutting apparatus with straight, inclined blades and in which the rotating blade is parallel to its axis of rotation so that its edge describes around that axis a cylinder of revolution which is effectively tangent to the moving plane of the web, while the counterblade which is obliquely positioned with reference to said axis of rotation has a slightly offset edge with reference to the plane of motion of the web, the two ends of said counterblade being situated on the surface of the imaginary cylinder described by the edge of the rotating blade.
  • the counterblade is mounted as rigidly as possible at its ends, whereas the adjustment screws 15 which are placed along its entire length, form stops to limit its flexing to a predetermined value which is a function of the angle of inclination of said blade with reference to the axis of rotation and also of the dimensional characteristics of the machine.
  • FIG. 1 is a perspective schematic view of the device according to the invention.
  • FIG. 2 shows the determination of the maximum flexure of the blade without respect to the angular scale
  • FIG. 3 shows the web as seen from above at the time of the cut; the angles being considerably enlarged.
  • FIG. 1 a device for progressive cutting is placed on a conveyor table on which a continuous web 1 having marginal perforations is fed in the direction of arrow F1.
  • a roller 2 and two pin conveyors 3a and 3b which engage the perforations in the margins of the web. It is to be understood, however, that additional conveyors are spaced transversely of those identified as 3a and 3b, the driving pins thereof being visible in the drawings of FIG. 1.
  • the cutting device is placed on a support 4 which is a part of the frame of the table between the two pairs of conveyors 3a and 3b as will be understood from the drawing.
  • This device comprises a frame or cage of which only the rectangular brackets 5a and 5b are represented, but it should be noted that those brackets are, in fact, rigidly connected with one another.
  • One of them, 5a slides freely on the support 4, and the other, 5b, carries a pivot 6 which is free to rotate in a seat provided in the support 4.
  • any lifting of the frame 5a, 5b with reference to support 4 is prevented.
  • a toothed wheel 8 is keyed to the end of shaft 7. This wheel 8 is intended to be driven in rotation in the direction of arrow F2 by means of a toothed belt, which is not shown, and by the same motor which also drives the conveyors 3a and 3b.
  • the driving pulleys (not shown) of these conveyors and that of the belt are preferably arranged respectively-on the two takeoffs" of a gear box 16.
  • the shaft 7 carries two flanges 9a and 9b between which blade 10 extends parallel thereto. Hence, this blade is rotated around shaft 7, and its edge generates the lateral surface of an imaginary cylinder of revolution of radius R.
  • the shaft 7 is placed at a distance R from the plane of motion of the web so that the edge of the mobile blade 10 brushes said plane at each revolution.
  • a fixed counterblade 11 is mounted transversely between the brackets a, 5b of the device within an opening extending transversely of the transport table with its ends being mounted as rigidly as possible on the base plates of said brackets 5a and 5b.
  • This counterblade includes an edge portion that extends the entire length of the spacing between the two flanges 9a and 9b. The end 11b of said edge is located within the plane of motion of web 1 and also lies on the line representing the geometrical projection of the axis of rotation of the mobile blade onto the plane of motion.
  • the blade 11 and this projection of the axis of rotation form a small angle whose maximum value will be evaluated hereinafter and the other end of the edge 11a is then slightly raised with reference to the plane of motion in such a way as to bring it back, as exactly as-possible, to a distance R from the axis of rotation.
  • the end 11a is displaced in the direction of arrow F1 relative to the end 11b.
  • the edge of the counterblade 11 represents a secant to the cylinder generated by the edge of blade 10; the two blades press against each other and flex lightly, these flexures attaining their maximum values when the blades cross each other midway of their length and then the flexure thereof decreases uniformly until it becomes null, this being achieved when the cooperation of the blades corresponds to the contact of extremities 10a and 11a, which are both situated at a distance R from the axis of rotation. An instant after attaining this position, the blades are no longer in contact until the following rotation.
  • FIG. 2 there is shown a geometric construction which permits the calculation of the maximum value of this displacement (for greater clarity, the angular scale has been considerably enlarged).
  • 0 represents an end view of the axis of rotation
  • P is the plane of motion of the web
  • C represents the cylinder of-radius R which is generated by the edge of the rotating blade
  • Oa represents the projection of axis 0 onto the plane of motion.
  • the extremity 11b of the counterblade lies in 0a.
  • the other extremity (11a) of the counterblade is first displaced in the direction of arrow F1 and arrives at 110' and then is brought to a distance R from O, at point 11a,
  • R a distance which. the counterblade 11 makes with the axis 0
  • L the length of the blades:
  • R is limited mechanically and L depends on the width of the webs (less than cm).
  • the ratio R/L may be as high as one-fourth. In that case, a can be at most 0.0374 radians, or a 210.
  • the mobile blade 10 in order to obtain a cut in the strip or webs which is perpendicular to the direction F1 of the motion thereof, the mobile blade 10 can be perpendicular to F1 only if its tangential speed is equal to the speed of motion thereof. This is possible if the apparatus is intended to make cuts of predetermined format. But, to make use of the aforementioned fact that the speeds can be made quite different, and in order to effect changes in the spacing of the cuts by varying the ratio of said speeds, particularly by means ofa gear box with two take-offs, (as has already been mentioned before), the mobile blade 10 is inclined by an angle B with respect to the perpendicular to F1.
  • FIG. 3 shows the web 1 resting on the counterblade l1 and the projection of the mobile blade 10 on said web at the moment where the two blades cross at A at the starting edge of the web.
  • y be the angle of inclination of the counterblade with respect to the straight line P which is perpendicular to F1.
  • the web 1 is cut progressively beginning at A until the blade 10 crossses the counterblade 11 at C.
  • the line of cut is therefore AC.
  • the ratio of the tangential speed of the blade 10 to the lateral speed of motion of the web is therefore given by p BC/AA'.
  • the shearing angle a be at least 1 so that by approaching the limiting angle of 2 10 calculated beforehand and beginning with a format 21TR with B 0 and 'y a 2, it is easy to obtain a format which is 5 times smaller, for example, all this while maintaining the perpendicularity of the cutting line, by taking 2/5 24 (/3 1 36) and by multiplying the tangential speed of the mobile blade by a factor of 5.
  • the shearing angle can be very small and, therefore, it is possible to do without the control of the inclination of the device on its support in order to reduce the cost.
  • the maximum displacement is: a X 18 X 10 X 5/24 or a X 3.75 X 10 and for a strip width of 400 mm, for example, this maximum displacement will be 0.15 mm, which is quite acceptable for commercial printing material, even if it is intended for an optical reader. (As a matter of fact, any type of reader may be used.)
  • one of the blades is provided with teeth which are generally of the order of 4 mm long and whose spacing is of the order of one millimeter (almost always equal to 1.2 mm). Since the edges of the blades have a width of at least approximately 0.3 mm, the flat blade will always bear against at least two teeth of the toothed blade as long as the angle a is less than the limit for which tan a 0.3/1.2 l/4, that is to say, as long as a is less than 14.
  • the blade would include an edge which gives two cutting lines, with one each of the cutting lines straddling the line of folding, such an arrangement would permit the faster removal of the narrow strips as they fall down.
  • pairs of conveyors such as 3a and 3b (FIG. 1) be replaced by one single conveyor extending across the cut, or at least one of the conveyors 3b may be in frictional engagement with the paper above it.
  • the marginal zones of strip 1 it is necessary only that the marginal zones of strip 1 not be cut, that is to say, one makes a out between the edges by limiting the length of the edge of at least that blade which is located underneath the web, so as to perform a cut of predetermined length across the web.
  • An apparatus for performing periodic, sequential penetrations in a continuously advancing material web comprising:
  • a transversely extending assembly pivotally mounted on said supporting frame and including: 1. laterally associated bracket members;
  • a straight-edged rotatable cutter blade having a cutting edge and mounted on and rotatable about said shaft in parallelism to said axis of rotation so that, when rotated, the cutting edge generates a rectangular cylinder of revolution;
  • a flexible straight-edged counterblade having a cutting edge including terminal end points and being held in its operative position solely by attachment of said end points to said bracket members and at an angle with respect to said axis of rotation and in such a position that at least said two end points of the cutting edge of the counterblade always lie on the surface of said cylinder of revolution, that portion of said counterblade between said end points being free of support; whereby during operation of the apparatus, the cutting edge of the counterblade cooperates with the cutting edge of the rotatable blade to perform the periodic, sequential penetrations of the material web and the flexibility of the counterblade alone permits the passage of the rotating blade beyond the counterblade.
  • At least one of the cooperating cutter means has a longitudinal extent of lesser length than the width of the material to be severed to thereby retain parallel uncut areas on oppositely disposed edges of the material to thereby sustain continuous, uninterrupted travel thereof.
  • bracket members is mounted adjustably relative to the direction of motion of the continuously traveling material by a micrometric means to thereby control the angle of cut with respect to the travel of the material, with the angle a formed by the rotary blade and the counterblade remaining constant.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shearing Machines (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
US33865973 1972-03-07 1973-03-07 Apparatus for transverse cutting or perforating a continuously advancing web Expired - Lifetime US3869950A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7207826A FR2175268A6 (en, 2012) 1972-03-07 1972-03-07
FR7305792A FR2218743A6 (en, 2012) 1973-02-19 1973-02-19

Publications (1)

Publication Number Publication Date
US3869950A true US3869950A (en) 1975-03-11

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US33865973 Expired - Lifetime US3869950A (en) 1972-03-07 1973-03-07 Apparatus for transverse cutting or perforating a continuously advancing web

Country Status (8)

Country Link
US (1) US3869950A (en, 2012)
JP (1) JPS48101686A (en, 2012)
AU (1) AU5293073A (en, 2012)
CA (1) CA991073A (en, 2012)
DD (1) DD102944A5 (en, 2012)
GB (1) GB1382961A (en, 2012)
IT (1) IT983496B (en, 2012)
NL (1) NL7303091A (en, 2012)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805501A (en) * 1986-10-15 1989-02-21 Fobelmac Consulting Ag System for processing a web
US5186090A (en) * 1991-06-28 1993-02-16 B. Bunch Company, Inc. Sheeting apparatus
US5765460A (en) * 1995-12-18 1998-06-16 Wathieu; Patrick Paper cutter for variable format
WO2000021723A1 (de) * 1998-10-12 2000-04-20 Schober Gmbh Werkzeug- Und Maschinenbau Variable querschneideeinrichtung
US6131496A (en) * 1996-10-21 2000-10-17 Koenig & Bauer-Albert Aktiengesellschaft Sheet processing machine with a chain conveyor
US20080041212A1 (en) * 2004-03-29 2008-02-21 Matt Kortuem Perforation machine for manufacturing adjustable vent baffles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019107063A1 (de) * 2019-03-20 2020-09-24 Bw Papersystems Hamburg Gmbh Messertrommel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062737A (en) * 1935-11-17 1936-12-01 Clark Aiken Company Paper cutting apparatus
US2592268A (en) * 1949-07-02 1952-04-08 Comet Envelope & Paper Co Inc Cutting device for moving strip
US3073196A (en) * 1962-07-05 1963-01-15 Marcalus Nicholas Progressive cutter for a web winding machine
US3359843A (en) * 1966-05-05 1967-12-26 Lamb Grays Harbor Co Inc Blade adjusting mechanisms for rotary paper cutters
US3401585A (en) * 1965-03-31 1968-09-17 Schmermund Alfred Cutting arrangements for cutting longitudinally moving webs
US3552251A (en) * 1968-12-03 1971-01-05 Bobst Champlain Inc Rotary slit cutter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062737A (en) * 1935-11-17 1936-12-01 Clark Aiken Company Paper cutting apparatus
US2592268A (en) * 1949-07-02 1952-04-08 Comet Envelope & Paper Co Inc Cutting device for moving strip
US3073196A (en) * 1962-07-05 1963-01-15 Marcalus Nicholas Progressive cutter for a web winding machine
US3401585A (en) * 1965-03-31 1968-09-17 Schmermund Alfred Cutting arrangements for cutting longitudinally moving webs
US3359843A (en) * 1966-05-05 1967-12-26 Lamb Grays Harbor Co Inc Blade adjusting mechanisms for rotary paper cutters
US3552251A (en) * 1968-12-03 1971-01-05 Bobst Champlain Inc Rotary slit cutter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805501A (en) * 1986-10-15 1989-02-21 Fobelmac Consulting Ag System for processing a web
US5186090A (en) * 1991-06-28 1993-02-16 B. Bunch Company, Inc. Sheeting apparatus
US5765460A (en) * 1995-12-18 1998-06-16 Wathieu; Patrick Paper cutter for variable format
US6131496A (en) * 1996-10-21 2000-10-17 Koenig & Bauer-Albert Aktiengesellschaft Sheet processing machine with a chain conveyor
WO2000021723A1 (de) * 1998-10-12 2000-04-20 Schober Gmbh Werkzeug- Und Maschinenbau Variable querschneideeinrichtung
US20080041212A1 (en) * 2004-03-29 2008-02-21 Matt Kortuem Perforation machine for manufacturing adjustable vent baffles
US8079293B2 (en) * 2004-03-29 2011-12-20 Brentwood Industries, Inc. Perforation machine for manufacturing adjustable vent baffles

Also Published As

Publication number Publication date
AU5293073A (en) 1974-09-12
GB1382961A (en) 1975-02-05
JPS48101686A (en, 2012) 1973-12-21
NL7303091A (en, 2012) 1973-09-11
IT983496B (it) 1974-10-31
CA991073A (fr) 1976-06-15
DD102944A5 (en, 2012) 1974-01-05

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