EP0280959A1 - Ouvre-boîtes, de préférence à moteur électrique - Google Patents

Ouvre-boîtes, de préférence à moteur électrique Download PDF

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Publication number
EP0280959A1
EP0280959A1 EP88102267A EP88102267A EP0280959A1 EP 0280959 A1 EP0280959 A1 EP 0280959A1 EP 88102267 A EP88102267 A EP 88102267A EP 88102267 A EP88102267 A EP 88102267A EP 0280959 A1 EP0280959 A1 EP 0280959A1
Authority
EP
European Patent Office
Prior art keywords
cutting
knife
edge
opener according
opener
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
EP88102267A
Other languages
German (de)
English (en)
Other versions
EP0280959B1 (fr
Inventor
Reinhard Kurz
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.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Priority to AT88102267T priority Critical patent/ATE65765T1/de
Publication of EP0280959A1 publication Critical patent/EP0280959A1/fr
Application granted granted Critical
Publication of EP0280959B1 publication Critical patent/EP0280959B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/30—Hand-operated cutting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/38—Power-operated cutting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/30—Hand-operated cutting devices
    • B67B7/32—Hand-operated cutting devices propelled by rotary gears or wheels around periphery of container

Definitions

  • the invention relates to a can opener for separating the lid from a can with a drive, preferably electrically operated, and with a transport wheel which can be driven by the drive and is rotatably mounted on a housing and which grips under the flanged rim of the can from the outside at the point of engagement with a at a fixed distance from the transport wheel on the housing on an axis of rotation, which can be pivoted from a starting position into a cutting position and which has a piercing tip and a cutter adjoining the piercing tip with a cutting point which engages with the lid in the cutting position, with a can opener on the can opener the can is designed to guide the first stop, which is arranged in the direction of movement of the can behind the point of engagement on the can opener.
  • the knife In the case of an electric can opener of this type (US Pat. No. 4,622,749), the knife is initially in a starting position (FIG. 19B), in which the can rim of a tin can formed by a flange edge can be attached to the transport wheel. By actuating an operating element connected to the knife, the knife is then pivoted in the direction of the cutting position until it initially lies with its piercing tip on the top of the lid of the can (FIG. 19C). The knife delimits the radially inner wall of the can rim from the outside, so that the flanged edge is held stationary on the side by the knife on the transport wheel, and as a result the can is almost coupled to the can opener.
  • the knife When the control element is pivoted further by hand, the knife then becomes - without it continuing to move relative to the cover twisted - biased by a spring against the lid until the control element switches on the electrical switch and the electric motor sets the transport wheel and thus also the can.
  • the piercing tip of the knife penetrates automatically due to the predetermined cutting geometry and the resilient contact pressure of the knife on the lid.
  • the knife rotates around the pivot formed on the operating element until it strikes the elongated hole formed on it on the pin protruding laterally on the actuating member. Due to the cutting process now starting, cutting forces are exerted on the knife by the can lid, which results in a torque acting clockwise on the knife. This torque is transmitted via the pin formed on the operating element and from there to the housing of the can opener (Fig. 19E).
  • a second stop is provided on the can opener, that the second stop is formed on the knife and that the second stop in the cutting position of the can opener from above onto the flanged edge works.
  • the second stop makes it possible for the torque which is produced on the knife due to the cutting forces to no longer be supported directly on the housing of the can opener, but rather, according to the invention, to act on the flanged edge of the can. This ensures that the tin can is always just sufficiently well transported by the transport wheel.
  • Cans with thicker sheets have higher cutting forces; however, these can only be achieved if greater effort is required to transport the can.
  • a higher expenditure of force is only possible if the flanged edge is pressed more strongly against the transport wheel by the second stop so that it penetrates deeper into the teeth of the transport wheel, so as to increase the frictional or frictional connection between these parts.
  • the automatic pressure control at the second stop only uses as much energy as is necessary to remove the lid from the can, i.e. again, the deformation work caused by the contact pressure and which arises between the transport wheel and the flange edge, but which consumes energy, is just so great that there is sufficient frictional engagement and / or positive locking between the transport wheel and the flange edge.
  • the can stop on the knife according to the invention thus creates a can opener which requires considerably less energy than conventional can openers, ie in the case of a rechargeable battery Driven can openers can open more cans in less time with the same loading capacity.
  • each can can be removed particularly easily from the can opener even after an interruption of a cutting process or at the end of a cutting process, without this, as from the prior art Technically known, the knife from the hand holding the can opener - the other hand must hold the can - must be levered out of the can with great effort.
  • it is only necessary to pivot the can around the point of engagement in the direction of rotation of the transport wheel such that the flanged edge of the can moves the second stop upward and thereby swivels the knife back out of the can into its starting position.
  • This arrangement according to the invention is particularly advantageous in the case of manually operated can openers and is also advantageous when the direction of rotation of the transport wheel is directed toward the hand. Then, when swiveling, the can is pivoted away from the hand holding the can opener so that the hand holding the can opener is not hindered.
  • the second stop also advantageously ensures that the cutting edge always assumes the same position with one and the same can type, ie, always comes into cutting engagement with the cover at the same point.
  • the knife is now only oriented over the edge of the can and is therefore not drawn deeper into the can, which would result in an undesirable increase in cutting forces due to the changing cutting geometry, such as the cutting angle, and thus a higher energy consumption by the can opener.
  • a further development of the invention provides that one of the knife acting on the flanged edge via the second stop for guiding the tin can during the cutting operation Pressure force occurs and that the pressure force, seen in the direction of movement of the flange edge, acts on the flange edge before the point of engagement.
  • the flanged edge in the area of the first and second stop forms a lever which is rotatably mounted at the point of engagement of the transport wheel and which is balanced during the cutting process in that the first and second stop from above and the transport wheel act on the flanged edge from below and the sum of the moments to the left and right of the point of engagement is zero.
  • the points of contact of the flanged edge with the first and second stops and the transport wheel are arranged in such a way that the cover with the cutting edge gives the cutting angle in the cutting position.
  • the second stop also serves to ensure that the cutting edge runs at a precisely predetermined angle to the can lid, so that only the minimally required cutting work required to separate the lid from the can can be maintained during the cutting process.
  • the second stop acts in front of the point of engagement on the flanged edge, it is possible to choose the distance between the second stop and the point of engagement so that, despite a relatively low pressing force on the second stop, sufficient friction / positive engagement already at the point of engagement for the safe transportation of the tin.
  • the driving force of the transport wheel is determined by the second stop not significantly changed since its application forces are small due to the selected knife geometry.
  • the pressing force acts on the flange edge in front of the cutting point.
  • the can is given particularly good guidance during the cutting process by the stops which are far apart from one another with respect to the point of engagement.
  • the flanged rim of a can can be pressed according to the invention without additional manual force alone by the drive of the can opener sufficiently firmly against the transport wheel if the pressing force is formed by a torque formed on the knife, which results from the cutting forces and dimensions present on the knife during the cutting process.
  • the pressing force arises only from an additional torque exerted by hand on the knife, which is introduced, for example, on the operating element to be actuated and the electric drive is switched on.
  • the pressing force it is also possible for the pressing force to be formed on the one hand by a torque which results on the knife during the cutting process and on the other hand by a second torque which acts on the knife by hand.
  • the latter handling has the advantage that the tin can is held perfectly between the two stops and the transport wheel even when the lid is not cut open.
  • Another advantage of this operation is that if the pressing force resulting from the cutting forces at the second stop is not sufficient to evenly transport the can, the operating element can still be subjected to an additional force by hand.
  • the from the Be Control element which can be transferred to the second stop by hand, is limited by a spring switched into the transmission path from the operating element to the knife, so that the piercing process does not take place by applying too much manual force, but by automatic plunge cutting due to the cutting and bearing geometry specified on the knife.
  • the second stop on the knife is particularly simple when it is formed by a sheet metal which projects laterally on the knife on the side facing the transport wheel.
  • the attachment of this second stop to the knife can be achieved, for example, by deforming the knife, by welding, screwing or similar fastening means known in mechanical engineering. But there is also the possibility of integrally molding the knife with the second stop, for example as a die-cast part. In order to enable simple operation of the knife from the front by hand, it is advantageous that the second stop protrudes laterally on both sides of the knife.
  • a projection directed towards the flange edge is formed on the second stop.
  • the projection can be designed as a bead, groove, knob, etc.
  • the center point of the axis of rotation of the knife viewed in the direction of movement of the flanged edge, lies at a distance x behind the point of the cutting intervention that the resulting force, which results during the cutting process at the cutting point of the knife from the cutting forces acting there, runs through the axis of rotation of the knife.
  • the position of the cutting edge according to the invention with respect to the axis of rotation of the knife also has the advantage that the knife is not held in the cutting position by a positive fit, but only by the frictional forces which occur on the cutting edge during the cutting process. If the cutting process is interrupted, these frictional forces can easily be overcome so that the knife can be pivoted back into its attachment position and the can opener can be removed from the can. The cutting process can thus also be interrupted before the cover is completely removed, which is desirable in many cases.
  • the distance b is at least half the distance between the cutting point and the piercing tip corresponds.
  • the second stop is arranged on the knife so that in the cutting position the piercing tip and the center of the transport wheel lie on a straight line which is essentially perpendicular to the upper edge of the flanged edge of the tin. This measure has shown that the cutting resistance resulting during the cutting process is further reduced.
  • the can opener according to the invention can achieve an advantageously low drive torque on the transport wheel and a favorable cutting behavior if the angle of incidence a of the cutting edge relative to the can lid to be separated does not exceed 30 °, in particular in a range between 15 ° and 30 °. lies. Particularly low cutting forces have been obtained with an angle of attack of 27.5 °.
  • the cutting results are also particularly favored if the distance between the center points of the transport wheel and the axis of rotation of the knife in the direction of movement of the flanged edge is in the range of 5 to 10 mm, preferably 6.5 mm, and if the distance perpendicular to the direction of movement is in the range of 15 to 30 mm, preferably 24 mm, runs.
  • An advantageously low cutting force is further achieved according to the invention in that a guide surface is connected to the cutting edge of the knife on the back and a first separating surface on the front and in that both surfaces enclose an angle d which is between 70 ° and 85 °.
  • the relatively large angle d ensures that the knife does not wedge in the cutting gap of the can lid when cutting, but rather strives to push the knife upwards out of the cutting gap.
  • the cutting point seen in the direction of movement of the flanged edge, lies in front of the point of engagement and at the same time a separating surface is formed on the knife, guidance of the can is achieved so that it does not oscillate back and forth around the point of engagement. This measure also reduces the energy consumption of the can opener.
  • the first separating surface takes on the largest part of the cutting energy right at the beginning of the cutting process, the can lid essentially from the knife at the cutting point more torn open or cut than is cut. Therefore, the cutting edge is not sharp, so that injuries are excluded.
  • the second parting surface is therefore necessary so that in the second phase of the parting process only the material on both sides of the cutting point is predominantly pressed away with as little energy expenditure as possible.
  • An advantageous knife shape is further achieved according to the invention in that the first and second separating surfaces run to the piercing tip of the knife.
  • the two separating surfaces thus taper from the inlet side of the can to the piercing tip of the cutting edge, which facilitates the piercing process and also the pivoting back of the knife into the starting position.
  • an open space adjoins the puncture tip which encloses an obtuse angle with the cutting edge.
  • a good guidance of the can rim and thus also the can on the can opener is advantageously ensured by the fact that, in the cutting position, the edge areas of the cutting edge and the free area, which laterally delimit, rest with their edge areas on the inner wall of the flange edge.
  • This measure prevents that, seen in plan view of the can, it does not swing back and forth during the cutting process around the point of engagement, so that an almost parallel to the flanged edge and clean cut is created.
  • the end faces run essentially perpendicular to the upper edge of the flanged edge.
  • a vertical distance y between the end faces of 6 to 10 mm, preferably 8 mm has proven to be advantageous.
  • the lateral ends of the end faces are rounded or chamfered. This measure also reduces the energy expenditure during the cutting process.
  • the piercing tip in the cutting position and in the direction of movement of the can edge lies behind the solder which is formed with the cutting edge and passes through the center of the axis of rotation of the knife.
  • teeth are formed on the circumferential edge of the transport wheel that point radially outwards and that run like saw teeth. This is because the greater the angle between two tooth flanks, the less the teeth engage in the underside of the flanged edge and the less the deformation work to be done.
  • the deformation work that occurs when the saw teeth are clawed into the flanged edge can continue can be reduced if the teeth are formed by tooth flanks of different lengths, it being essential that the longer and flatter tooth flank is arranged in front of the shorter and steeper tooth flank of a tooth in the direction of rotation of the transport wheel.
  • the shorter tooth flank achieves a better form and / or frictional connection between the transport wheel and the flanged edge, while the longer tooth flank enables the respective tooth to slide better out of the depression formed by the toothing in the flanged edge.
  • the diameter of the transport wheel is chosen to be as large as possible so that as many teeth as possible engage in the underside of the flanged edge. With a diameter of the transport wheel of 10 to 20 mm, preferably 15 mm, there is already a good engagement without the pressing force of the second stop being too great.
  • FIGS. 1 to 4 To avoid repetitions, the same reference numerals have been used in FIGS. 1 to 4 for correspondingly identical components.
  • the can opener shown in FIG. 1 consists of a housing 1, on which, at a distance from one another, an axis of rotation 13 of a knife 3 and a transport wheel 4, which can be pivoted from a starting position 20 (shown in broken lines) into a cutting position 28, are mounted.
  • the transport wheel 4 is driven in the direction of rotation 40 by a transmission (not shown in the drawing) and an electric motor.
  • the knife 3 is in FIGS. 1 to 4 in its cutting position 28, in which its cutting edge 8 at the cutting point 9 cuts through the lid 10 in the immediate vicinity of the flange edge 6.
  • the slightly downwardly bent edge of the separated cover 10 is designated 11.
  • the cutting edge 8 has an angle of attack "a" of 27.5 ° in the cutting position 28 shown.
  • the setting or cutting angle "a” is determined by the cutting edge 8 and formed by the horizontal shown in Figures 1 and 2, which simultaneously forms the cover 10.
  • the exact pivoting position of the knife 3 in the cutting position 28 is determined by a second stop 15, which is attached to the inlet side 46 of the knife 3 and is designed as a stop plate, and which lies on the upper edge 35 of the flanged edge 6 in the cutting position 28.
  • the position of the knife 3 can thus be easily adapted to different heights of the edge 6 of the bundle.
  • the cutting edge 8 is adjoined at the top by a first separating surface 14 which, with the guide surface 30 formed on the rear of the knife 3 and running essentially parallel to the wall surface 48 of the housing 1, encloses the angle "d".
  • the first parting surface 14 is followed by a second parting surface 21, which includes the angle "f" with the guide surface 30.
  • the guide surface 30 lies in the cutting position 28 according to FIG. 3 on the inner wall 39 of the wall 5 and on the radially outer interface 59 of the cover 10.
  • edges 49, 50 which arise at the transitions from the first separating surface 14 to the second separating surface 21 and at the second separating surface 21 to the front 31 of the knife 3, run parallel to the cutting edge 8.
  • these edges 49 run , 50 not parallel to the cutting edge 8, but they approach the piercing tip 17 and cut it.
  • the piercing tip 17 forms the point closest to the center 33 of the transport wheel 4 at the end of the cutting edge 8.
  • the disk 22 is mounted on the drive shaft 25 driving the transport wheel 4.
  • the drive shaft 25 penetrates the housing wall 51 via the bore 52 and is connected to the drive motor via a gear, not shown in the drawing.
  • the transport wheel 4 is rotatably connected to the drive shaft 25.
  • bracket 23 On the wall surface 48, there is a bracket 23 which overlaps the transport wheel 4 and is fastened to the housing 1.
  • the U-shaped bracket 23 serves to support particularly low food cans 24, such as oil sardine cans.
  • a bar 53 is formed below the bracket 23 on the wall surface 48, which serves to support high cans 24.
  • the cutting edge 8 is followed in FIG. 1 by a free surface 16 towards the outlet side 48, which includes the angle "e” with the cutting edge 8.
  • the cutting edge 8 is delimited on the inlet side 46 by the end face 18, which extends vertically upwards in the drawing.
  • the end face 19 connects, which ver parallel to the end face 18 running.
  • the two end faces 18, 19 run at a distance "y" from one another which is dimensioned so large that the inner wall 39 of the wall 5 bears against the sections 36, 37 designed as corners.
  • the sections 36, 37 are rounded, but this is not shown in the drawing.
  • the cutting point 9 lies to the left of the axis of rotation 26 of the transport wheel 4, while the piercing tip 17 in the cutting position 28 (see FIG. 1) extends approximately perpendicularly above the axis of rotation 26. Furthermore, it can be seen that the distance from the end face 18 to the axis of rotation 26 is smaller than the distance from the end face 19 to the axis of rotation 26. This arrangement was therefore chosen so that during the cutting process from the teeth 27 to the lower edge 43 of the engagement point 29 radially outer flanged edge 6 (FIG. 3) transmitted circumferential force U1, which exerts a torque rotating counterclockwise according to FIG.
  • FIG. 2 it can be seen that the cutting point 9 is arranged on the knife 3 to the left of the vertical straight line 34 running through the center 33 of the transport wheel 4.
  • the solder L1 formed on the cutting edge 8, which cuts the cutting point 9, runs at a distance "b" in front of the center point 2 of the axis of rotation 13 of the knife 3. This strives for the cutting force acting perpendicularly on the cutting edge 8 at the cutting point 9, Swivel knife 3 clockwise. This endeavor is counteracted by the frictional forces acting on the cutting edge 8, so that the knife 3 is in practice moved counterclockwise during the cutting process, that is to say into the can 24.
  • the control element can, for example, be a lift mounted on the housing 1, which is actuated by hand and serves on the one hand to pivot the knife 3 into the cutting position 28 and on the other hand serves to switch on the electric motor and thus the can opener, which is not shown in the drawing .
  • Fig. 1 is further arranged on the housing 1 on the outlet side 47 a U-shaped handle 38 which facilitates the handling of the can opener.
  • the operation of the can opener according to the invention is as follows:
  • a can 24 is placed on the peripheral surface 45 of the transport wheel 4 with its lower edge 43 (FIG. 3) formed on the flanged edge 6 on the radially outer circumference.
  • the flange 6 is now tied between the knife 3 and the transport wheel 4 in such a way that the can 24 can no longer be removed from the can opener.
  • a torque acting counterclockwise on the knife 3 causes the piercing tip 17 to press with prestress on the top of the cover 10.
  • the transport wheel 4 now begins to rotate in the direction of rotation 40 and thereby rotates the can 24 in the direction of movement 12. Because of the larger angle of attack "a" of the cutting edge 8 and the shifted point of application of the forces on the piercing tip 17, the piercing process is effected automatically and is required therefore no significant force from the control element.
  • the knife 3 After inserting the cover 10, the knife 3 penetrates into the cover 10 through the cutting pressure and the cutting friction on its cutting edge 8 until the second stop 15 bears against the upper edge 35 of the flanged edge 6. Due to the predetermined cutting geometry, a resulting force "R” acts on the cutting point 9, which exerts a counterclockwise torque on the knife 3. This torque is supported in the form of the force "N” via the second stop 15 on the upper edge 35 of the flanged edge 6. As a result, the can 24 experiences a torque which rotates counterclockwise to the left in FIG. 1 and which in turn is supported on the transport wheel 4 and on the first stop 7. The greater the sheet thickness of the cover 10, the greater the force N and the more the flanged edge 6 is pressed against the transport wheel 4.
  • This self-reinforcement always ensures that the transport of the can 24 and thus a continuous cutting process is ensured without the operator having to use additional force. Even when the distances from the upper edge 35 of the flanged edge 6 to the surface of the cover 10 differ, the knife 3 always adjusts itself automatically, so that the angle of attack "a" does not assume impermissible values.
  • the flanged edge 6 is guided in the circumferential direction of the can 24 during the cutting process by the side surfaces 18, 19 of the knife 3 which are perpendicular to the direction of movement and face the flanged edge 6.
  • the movement of the knife 3 into the starting position 20 is therefore only braked by the frictional engagement between the cover 10 and the flanged edge 6, which, however, can be easily overcome due to the first and second separating surfaces 14, 21 which are advantageous on the knife 3.
  • the piercing tip 17 also does not hinder the pivoting out of the knife 3, since it does not touch the uncut area of the cover 10 either.
  • the knife 3 can be swiveled out of the can 24 in the same way as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Discharge Heating (AREA)
EP88102267A 1987-02-27 1988-02-17 Ouvre-boîtes, de préférence à moteur électrique Expired - Lifetime EP0280959B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102267T ATE65765T1 (de) 1987-02-27 1988-02-17 Dosenoeffner, vorzugsweise mit elektrischem antrieb.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3706414 1987-02-27
DE3706414 1987-02-27
DE3710884 1987-04-01
DE3710884 1987-04-01

Publications (2)

Publication Number Publication Date
EP0280959A1 true EP0280959A1 (fr) 1988-09-07
EP0280959B1 EP0280959B1 (fr) 1991-07-31

Family

ID=25852990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102267A Expired - Lifetime EP0280959B1 (fr) 1987-02-27 1988-02-17 Ouvre-boîtes, de préférence à moteur électrique

Country Status (7)

Country Link
US (1) US4901441A (fr)
EP (1) EP0280959B1 (fr)
KR (1) KR910006137B1 (fr)
AT (1) ATE65765T1 (fr)
CA (1) CA1303839C (fr)
DE (1) DE3863941D1 (fr)
ES (1) ES2023225B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2669912B1 (fr) * 1990-11-29 1993-07-30 Moulinex Sa Ouvre-boites.
US6516524B1 (en) 2000-10-23 2003-02-11 Hamilton Beach/Proctor-Silex, Inc. Battery operated portable can opener

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863483A (en) * 1927-10-03 1932-06-14 Glenn L Jackson Can opener
DE579192C (de) * 1932-03-19 1933-06-22 Grodetzky & Polak Vorrichtung zum Aufschneiden, insbesondere von Konservenbuechsen
US2024449A (en) * 1934-01-13 1935-12-17 Ernest J Hileman Can opener
CH505024A (de) * 1968-01-08 1971-03-31 Metallindustrie Denkingen Gebr Elektrisch betriebener Dosenöffner
US3706135A (en) * 1969-11-08 1972-12-19 Matsushita Electric Ind Co Ltd An electrically powered can opener
US4622749A (en) * 1984-05-07 1986-11-18 Kabushikikaisha Aichidenkikosakusho Electric can opener

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975515A (en) * 1959-12-21 1961-03-21 Elvin S Land Can opener

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863483A (en) * 1927-10-03 1932-06-14 Glenn L Jackson Can opener
DE579192C (de) * 1932-03-19 1933-06-22 Grodetzky & Polak Vorrichtung zum Aufschneiden, insbesondere von Konservenbuechsen
US2024449A (en) * 1934-01-13 1935-12-17 Ernest J Hileman Can opener
CH505024A (de) * 1968-01-08 1971-03-31 Metallindustrie Denkingen Gebr Elektrisch betriebener Dosenöffner
US3706135A (en) * 1969-11-08 1972-12-19 Matsushita Electric Ind Co Ltd An electrically powered can opener
US4622749A (en) * 1984-05-07 1986-11-18 Kabushikikaisha Aichidenkikosakusho Electric can opener

Also Published As

Publication number Publication date
KR880012477A (ko) 1988-11-26
ATE65765T1 (de) 1991-08-15
DE3863941D1 (de) 1991-09-05
KR910006137B1 (ko) 1991-08-16
EP0280959B1 (fr) 1991-07-31
CA1303839C (fr) 1992-06-23
US4901441A (en) 1990-02-20
ES2023225B3 (es) 1992-01-01

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