US3823636A - Punching apparatus - Google Patents

Punching apparatus Download PDF

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Publication number
US3823636A
US3823636A US25258872A US3823636A US 3823636 A US3823636 A US 3823636A US 25258872 A US25258872 A US 25258872A US 3823636 A US3823636 A US 3823636A
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US
United States
Prior art keywords
roller
press according
center post
axis
roller press
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
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English (en)
Inventor
E Spengler
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.)
Roeder and Spengler OHG
Original Assignee
Roeder and Spengler OHG
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 DE19717119648 external-priority patent/DE7119648U/de
Priority claimed from DE19712156829 external-priority patent/DE2156829A1/de
Application filed by Roeder and Spengler OHG filed Critical Roeder and Spengler OHG
Application granted granted Critical
Publication of US3823636A publication Critical patent/US3823636A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B26F1/42—Cutting-out; Stamping-out using a press, e.g. of the ram type having a pressure roller
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B5/00—Clicking, perforating, or cutting leather
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/11—Machines or apparatus for cutting or milling leather or hides
    • C14B2700/113—Cutting presses
    • 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
    • Y10T83/788—Tool pair comprises rotatable anvil and fixed-type tool
    • Y10T83/793—Anvil has motion in addition to rotation [i.e., traveling anvil]
    • Y10T83/798—Additional motion is along fixed arcuate path

Definitions

  • the present roller press has a base, a center post, material supporting means, and roller means arranged in such a manner that the roller means or the material supporting means or both may be journaled about the center post whereby a relative movement between the material supporting means and the roller means is accomplished either by hand operation or by driving means, which movement follows a circular path around-said center axis.
  • the spacing between the supporting means and the roller means is adjustableto determine the cutting pressure and to accomodate material of different widths.
  • the present invention relates to a roller press, more specifically, to a press which is operable as a cutting machine to progressively cut shapes out of relatively flat material by meansof steel strip knives.
  • the present cutting machine is useful for a wide variety of flat materials such as plastic sheets, leather, textiles, and'even flat pieces of meat to be cut into goulash cubes.
  • Punching or cutting presses for cutting shapes out of flat material are well known in the art.
  • One type comprises a bridge or gantry for supporting a punch which is movable vertically up and down.
  • Another type comprises a so called swivel arm.
  • a roller type of cutting apparatus has also been recently developed.
  • the cutting knives in the so called bridge and swivel arm presses are attached to the under surface of a pressure plate.
  • the cutting knives are attached to the outer surface of a roller.
  • the cutting knives may be loosely placed on top of the material to be cut whereby a so called sandwich packet is formed comprising'the material to be cut, the cutting knives, and a pressure plate.
  • roller press which advantageously combines the features of a conventional roller press and of a swivel arm press whereby the cutting knives may be placed in the above describedv sandwich manner between a swiveling means and an abutment means and whereby the abutment means may also bed the swiveling type;
  • roller type press which is suitable for a wide variety of purposes, for example, for the cutting of felt or rubber gaskets and also for the cuttingof flat pieces of meat into goulash cubes;
  • roller press the construction of which is such that its price will be within the range of the small shopkeeper such as the operator of a shoe repair shop
  • a roller press which combines in it the features of a swivel arm press and a roller press.
  • a roller which exerts the progressive cutting pressure or an abutment means or dinal axis of said centerpost.
  • the entire'roller or the entire abutment means follow the circular path through a range corresponding to the desired cutting range so that the concerted movement of a plurality of small diameter roller rods is avoided.
  • the required contact pressure in a machine according to the invention is surprisingly small so that the present roller press may easily be actuated by an operator by simply pulling the swivel arm across the abutment means or vice versa.
  • the present roller press will comprise but a single roller which may be made up of a plurality of cylindrical disks arranged on a common axis, or which may be a conical frustum roller pointing with its smaller diameter end toward the center axis of said center post.
  • the presser roller may be arranged above or below a material supporting table which may be of the flexible type.
  • the conical presser roller has the advantage that slipping is avoided because due to the decreasing diameter of the conical roller from its outer end toward the center post, the circumferential speeds are adapted to the decreasing radius of the circular path travelled by the particular portion of the roller around the center post.
  • cylindrical rollers made up of a plurality of independently rotatable disks also avoid the above problem becauseeach disk may rotate at its own speed.
  • the presser roller or rather the frame means which support the presser roller or even the abutment means may be positively-driven, for example, by a rotary piston hydraulic drive means.
  • a material supporting punch table forms .part of a base to which is attached an upright post.
  • the presser roller is journaled in a frame and the frame in turn is journaled to the upright post.
  • the table may also be journaled to said post so that a relative motion may be accomplished between the roller and the table whereby the longitudinal axis of the roller extends radially through the longitudinal center axis of the upright post and preferably at a right angle thereto.
  • the material supporting table should be stationary, and the roller should be moved along said circular path, it is quite possible to move the table alongsaid path and keep the rollers rotating in a stationary position of its frame.
  • the embodiment according to the invention in which the presser rollers are arranged beneath a material supporting table is especially suitable for making such table from a flexible steel sheet.
  • the invention teaches to provide an aperture in the abutment means so that, for
  • FIG. 1 is a top plan view of one half of a roller press according to the invention wherein two presser rollers of cylindrical shape are employed each presser roller including a plurality of spaced disks;
  • FIG. 2 is a side view of the roller press according to FIG. 1;
  • FIG. 3 is a front view of the roller press illustrated in FIGS. 1 and 2;
  • FIG. 4 illustrates a modified embodiment wherein a conical frustum is employed as a presser roller which is'arranged underneath a flexible material supporting table;
  • FIG. 5 is a front view of the embodiment according to FIG. 4;
  • FIG. 6 is a top plan view onto an embodiment also with a conical presser roller but arranged above a material supporting table;
  • FIG. 7 is a side view of the embodiment according to FIG. 6;-
  • FIG. 8 is a front view of the embodiment according to FIGS. 6 and 7;
  • FIGS. 9, l0, and 11 illustrate an embodiment quite similar to that of FIGS. 6, 7 and 8 except that an auxiliary cylindrical roller of relatively small diameter and comprising a plurality of individually rotatable disks is arranged on each side of the main presser roller;
  • FIG. 12 illustrates a side view of an embodiment comprising a cylindrical roller made up of a plurality of individual disks and arranged below a flexible material supporting table;
  • FIG. 13 is a front view of the embodiment according to FIG. 12;
  • FIG. 14 illustrates a side view of an embodiment comprising two rollers both of which are journaled to the center post, one of which is arranged below a flexible table and the other one is arranged above such ta- 1
  • FIG. 15 is a front view of the apparatus according to FIG. 14;
  • FIG. 16 is a side view of an embodiment where the supporting table is journaled to the center post and the abutment means comprises a roller arranged above the material supporting table;
  • FIG. 17 is atop view onto the embodiment according to FIG. 16.
  • the upper bushing member 6 is closed except for a threaded hole 8 through which extends a threaded bolt 9, the lower end 10 of which is secured against axial displacement to the upper end of the center post 2.
  • the lower end 10 of the threaded bolt 9 is rotatable relative to the center post 2 by means of a handle 11 whereby the elevation of the unitary structure comprising the frame 4 and the bushings 5 and 6 may be adjusted relative to the center post 2.
  • the frame structure comprises a cross plate 12 which is secured to the outer or free end 13 of the main frame member 14 extending radially away from the center post 2.
  • the inner end of the main frame member 14 is, for example, welded to the bushings 5 and 6.
  • Handle means 15 are attached to the cross plate 12 in any conventional manner.
  • the frame structure 4 supports two cylindrical presser rollers 16 and 17. Each of these rollers is made up of a plurality of cylindrical disks l8 rotatably supported on'a respective common axes 19 and 20.
  • the rotational axes of the disks 18 are supported with their outer ends in the cross plate 12 and with their inner end in the bushing 5 as shown at 21 in FIG. 2.
  • the axes l9 and 20 are preferably not rotatable. However, each disk 18 is freely rotatable on the respective axes and inscribed in detail only once in order to avoid repetition.
  • FIGS. 1, 2 and 3 there is shown a base 1 to which is secured an upright post 2, for example, by
  • the center post 2 defines a cendependently of the adjacent disk.
  • the disks 18 of each roller arespaced from each other and the rollers are arranged in such a manner relative to each other that the disks of one roller are in register with the spacings between the disks of the other roller or vice versa. In this manner uniform cutting pressure is assured over the entire surface area of the flat material to be cut.
  • the longitudinal axes l9 and 20 of the rollers 16 and 17 are supported by the frame structure 4 in the same horizontal plane and in such a manner that these axes extend at an angle relative to each other as best seen from FIG. 1 and radially relative to the center axis 3 of the post 2.
  • the extensions of the axes l9 and 20 intersect with each other and with the center axis 3.
  • the base 1 comprises a material supporting table 22 which is arranged to extend horizontally underneath the circular path of the rollers 16 and 17.
  • the strip steel knives 23 and the material to be cut 24 are arranged in the fonn of a sandwich on top of the supporting table 22 and in the path of the circular movement of the roller l6 and 17.
  • the outer end of the rollers will cover such a radius that the entire material is completely cut.
  • a gear 26 is secured to the, for example, lower end-of the bushing 5.
  • a piston cylinder arrangement 27 drives, for example, through gearing means not shown in detail a further gear 28.
  • the gears 26 and 28 are interconnected, for example, by a chain drive 29 whereby the entire frame structure may be journaled back and forth across the supporting table 22.
  • the table 22 may be connected to the cylinder of the piston cylinder arrangement 27 by means of arms 30. These arms may form part of the base 1.
  • the steel strip knives 23 face the table 22 and that the material 24 to be cut is placed on top of the steel strip knives so that the material faces the rollers, whereby the rollers contact the material to be cut directly.
  • the reverse arrangement is also possible whereby, if desired, a pressure plate may be inserted between the knives and the rollers.
  • the frame structure 4 is the same as that in FIGS. 1 to 3.
  • the frame structure 4 in FIG. 4 supports an abutment member 31 rather than the roller which in the embodiment of FIG. 4 is arranged in a further frame structure 32 underneath a flexible table 33.
  • the further frame structure 32 is secured to further journal means 34 which are rotatable about the center post 2.
  • the journal means 34 are supported against downward displacement and for rotational movement by roller bearings 35 which rest on a shoulder 36 around the lower end of the center post 2.
  • the latter may be bolted, as through a flange 37 to the base 1.
  • Drive means 26, 27, 28 and 29 are provided for rotating the journal means 34 in the same manner as has been described above with reference to FIG. 2.
  • the chain wheel 26 is connected to the bushing 34 by links 38. Further the chain wheel 26 is rotatable relative to the center post 2.
  • the further frame structure 32 comprises an upright member 39 for supporting the outer end of the, axis 40 of the presser roller 41 which in the embodiment of FIG. 4 has a conical frustum shape.
  • the frame structure 32 has attached to its outer end a guide or track roller 42 which runs on the base 1, preferably ona track 43.
  • the strip steel knives 23 may be directly attached to the abutment plate 31. Underneath the strip steel knives 23 there is stretched across the base 1 a flexible table 22 on which is supported the material 24 to be cut.
  • the base 1 is provided with upright members 44 to which two opposite edges of the flexible table 22 are attached by adjustable tightening means such as a turnbuckle 45 or a bolt and wing nut 46.
  • the axis 40 of the conical roller 41 extends'radially toward the center axis 3 and at such an angle relative to the horizontal, that the generatrix of the conical roller 41 extends substantially horizontally and in contact with the flexible table 22.
  • the frame structure 32 for the roller 41 may comprise, for example, two substantially vertically extending parallel bars'47 which at their inner ends are rigidly secured, for example, by welding to the journal bearing 34.
  • the two parallel bars 47 are connected'to each other, for example, by the upright member 39.
  • FIGS. 6, 7 and 8 The arrangement of FIGS. 6, 7 and 8 is similar to the embodiment shown in FIGS. 1, 2 and 3 except that the roller 48 is a conical roller arranged above the material supporting table 49 which is provided with an aperture 50 through which the cut pieces may drop downwardly.
  • the axis 51 of the roller 48 is secured against rotation at the one end in the journal means 34 and at the other endin the front end 52 of the frame structure 4.
  • the frame structure may comprise two parallel plates 53 and 54 interconnected at the front end by a cross piece 55 in which the axis 51 is supported.
  • the axis 51 forms an angle with the horizontal and extends radially relative to the center axis 3 of the upright post 2.
  • the extension of the axis 51 and the center axis 3 intersect with each other.
  • the angle between .the horizontal and the axis 51 is selected in such a manner that a generatrix of the roller 48' extends horizontally and thus in parallel to the table 49.
  • the shape of the frame structure 4 is adapted to the shape of the conical roller 48 so that the latter may freely rotate about its axis 51, or axis 51 may rotate.
  • FIGS. 9, 10 and 11 The embodimeent illustrated in FIGS. 9, 10 and 11 is quite simialr to that of FIGS. 6, 7 and 8, except that in FIGS. 9, 10 and 11 two auxiliary rollers are provided.
  • One auxiliary, cylindrical roller 56 is arranged on one side of the roller 48, whereas another cylindrical, auxiliary roller 57 is arranged on the opposite side of the roller 48.
  • the auxiliary rollers 56, 57 are also supported in the frame structure 4 in the same manner as the roller 48, except that the rotational axis of the rollers 56 and 57 extend horizontally rather than at an angle relative to the table 22.
  • the main roller 48 and the two auxiliary rollers are journalled for movement along the above mentioned circular path around the center axis 3.
  • FIGS. 9, 10 and 11 with its auxiliary rollers 56 and 57 is especially suitable for cutting relatively thick, flat material.
  • the vertical gap between the material to be cut and the auxiliary rollers may be somewhat larger than the gap between the horizontal generatrix of the roller 48 and the material to be cut.
  • the auxiliary rollers dependingon the direction of the circuit movement, will accomplish a pre-cut and the main roller 48 will complete the cut.
  • the auxiliary rollers 56 and 57 may also serve for yet another purpose, namely, to smooth out the material in front of the main roller 48.
  • the ends of the axis of the horizontal cylinder rollers 56 and 57 may be supported in slots provided in the journal means 34 and in the front plate 58. Spring means 59 may then bear against the respective axis end whereby the auxiliary rollers may yield slightly up and down for properly smoothing out the material in front of the main roller 48.
  • auxiliary rollers 56 and 57 are made up of a plurality of individual disks rotatablyarranged on their respective axis.
  • FIGS. 12 and 13 The embodiment illustrated in FIGS. 12 and 13 is quite similar to that of FIGS. 4 and 5, except that the conical roller 41 has been replaced in FIGS. 12 and 13 by a cylindrical disk roller 60.
  • the table 22 is also of the flexible type and it is stretched across the base as has been described above with reference to FIGS. 4
  • the frame structure 61 differs slightly from that described with reference to FIGS. 4 and 5 in that the frame structure 61 is adapted to the shape of the cylindrical roller 60.
  • FIGS. 14 and 15 illustrate an embodiment representing essentially a combination of the embodiment of FIG. 4 with that of FIG. 7 whereby the conical roller 41 is used in combination with the conical roller 48. Both rollers are journalled for movement along a circular path about the center axis 3 of the post 2.
  • either the lower or the upper roller may be rotated for the cutting operation.
  • interlocking pins 62 may be provided which in a disengaged position do not reach into respective recesses 63 in the journal 34.
  • the pins reach into said recesses 63.
  • FIG. 16 shows an embodiment wherein the material supporting table 64 is journalled to the upright post 2 at 65.
  • the journal 65 and a guide roller 66 support the table 64 for a rotational movement about the center axis 3 when the talbe is operated, for example by its handle 67.
  • the frame -4 is again journalled to the upright post 2 so that the roller 68 takes up the position as described above relative to a strip steel knife 69 having, for example, a grid type pattern.
  • the material to be cut is, for example, a flat piece of meat 70 and movement of the table 64 in the direction of the arrow 65 will result in cutting the piece of meat 70 into a plurality of cubes in one stroke so to spreak.
  • the frame 4 is adjustable up and down the post 2 by first loosening the set screw 71 and than thightening it again when the frame 4 with the roller 68 has assumed the desired position.
  • the post 2 is provided with a groove 72 in which the end of the set screw 71 is received to prevent lateral displacement of the frame 4.
  • Other convenient means for fixing the position of the frame 4 may be provided.
  • the table 64 When the cutting stroke is completed, the table 64 will be in a position for convenient removal of the cut cubes.
  • a roller press for progressively cutting shapes out of relatively flat material by means of steel strip knives comprising a base, a center post secured to said base and defining a center axis, means for supporting said flat material, main roller means, frame means for rotatably supporting said main roller means relative to said center post so that said main roller means provide a line of contact between a generatrix of said main roller meansand said flat material, said generatrix extending radially and substantially perpendicularly toward said center.
  • journal means journaled to said center post for permitting a relative movement between said material supporting means and said main roller means whereby said relative movement follows a circular. path having its center located in said center axis, and two auxiliary, substantially cylindrical rollers supported by 8 said frame means so that one auxiliary roller is arranged alongside of each side of said main roller means.
  • roller press according to claim 1, further comprising means for also rotatably supporting said auxiliary rollers in said frame means for movement along said circular path together with the main roller means.
  • auxiliary rollers comprise longitudinal axes
  • means for supporting the auxiliary rollers comprise guide slots in said frame means, said longitudinal axes of the auxiliary rollers having ends riding in said guide slots and resilient means pressing against the respective axis end whereby said auxiliary rollers are pressed downwardly and yield upwardly.
  • each of said auxiliary rollers comprise a plurality of disks rotatably supported on a respective commonaxis.
  • roller press according to claim 1, further comprising power drive means operatively connected to mon longitudinal cylinder'axis means on which the disks rotate independently of each other.
  • the base includes upright members, said material supporting means comprising flexible table means, means for stretching said flexible table means between said upright base members and for connecting the flexible table means to said upright base members, said journal means joumaling said frame means to said center post in such a position that the main roller means are located below said flexible table means, abutment means and further journal means for joumaling said abutment means to said center post .whereby said abutment means are located above said flexible table means.
  • said frame means comprise guide roller means arranged to run on said base along a circular path aroundthe center post.
  • said abutment means comprise a further roller means rotatably supported by said abutment means and having a rotational axis pointing substantially radially toward said center axis.
  • roller'pr'ess according to claim 12, wherein said further roller means comprise a conical roller pointing substantially radially toward said center axis.
  • said material supporting means comprise a table, means for journaling said table to said center post, means for adjustably securing said frame means to said center post, support roller means for supporting said table on said base, and means for tilting said table about said'center post whereby said support roller means run along a circular path around said center post.
  • roller press according to claim 1, further comprising adjustment means arranged for cooperation with said frame means and said center post whereby said frame means are adjustable up'and down along said center post.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Shearing Machines (AREA)
US25258872 1971-05-19 1972-05-12 Punching apparatus Expired - Lifetime US3823636A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717119648 DE7119648U (de) 1971-05-19 1971-05-19 Presse zum ausstanzen
DE19712156829 DE2156829A1 (de) 1971-11-16 1971-11-16 Verfahren und vorrichtung zum ausstanzen

Publications (1)

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US3823636A true US3823636A (en) 1974-07-16

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ID=25762025

Family Applications (1)

Application Number Title Priority Date Filing Date
US25258872 Expired - Lifetime US3823636A (en) 1971-05-19 1972-05-12 Punching apparatus

Country Status (6)

Country Link
US (1) US3823636A (it)
AT (1) AT312785B (it)
FR (1) FR2138038B1 (it)
GB (1) GB1339696A (it)
IT (1) IT955604B (it)
NL (1) NL7205617A (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494435A (en) * 1983-09-23 1985-01-22 Ned Lindsay Cutting device
NL1020212C2 (nl) * 2002-03-20 2003-09-23 Cornelis Hermanus Ponsteen Snij-inrichting voor het snijden van een plaat uit een baan van een vouwbaar plaatmateriaal.
US20120006172A1 (en) * 2010-07-10 2012-01-12 Zahoransky Ag Device for separating packages from a carrier belt having successively arranged blister bubbles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US668959A (en) * 1899-08-05 1901-02-26 Eugene H Davis Machine for cutting cigar-wrappers.
US1011127A (en) * 1905-02-21 1911-12-05 Eugene H Davis Cigar-machine.
DD96446A2 (it) * 1971-08-19 1973-03-20

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US668959A (en) * 1899-08-05 1901-02-26 Eugene H Davis Machine for cutting cigar-wrappers.
US1011127A (en) * 1905-02-21 1911-12-05 Eugene H Davis Cigar-machine.
DD96446A2 (it) * 1971-08-19 1973-03-20

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494435A (en) * 1983-09-23 1985-01-22 Ned Lindsay Cutting device
NL1020212C2 (nl) * 2002-03-20 2003-09-23 Cornelis Hermanus Ponsteen Snij-inrichting voor het snijden van een plaat uit een baan van een vouwbaar plaatmateriaal.
WO2003078116A1 (en) * 2002-03-20 2003-09-25 Cornelis Hermanus Ponsteen Cutting device for cutting a sheet comprising a frame and a pressure roller
US20120006172A1 (en) * 2010-07-10 2012-01-12 Zahoransky Ag Device for separating packages from a carrier belt having successively arranged blister bubbles

Also Published As

Publication number Publication date
FR2138038A1 (it) 1972-12-29
NL7205617A (it) 1972-11-21
GB1339696A (en) 1973-12-05
IT955604B (it) 1973-09-29
AT312785B (de) 1974-01-25
FR2138038B1 (it) 1973-07-13

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