EP1024110B1 - Improved can opener with circular blade and assembly method thereof - Google Patents
Improved can opener with circular blade and assembly method thereof Download PDFInfo
- Publication number
- EP1024110B1 EP1024110B1 EP99125150A EP99125150A EP1024110B1 EP 1024110 B1 EP1024110 B1 EP 1024110B1 EP 99125150 A EP99125150 A EP 99125150A EP 99125150 A EP99125150 A EP 99125150A EP 1024110 B1 EP1024110 B1 EP 1024110B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- pivot
- opener
- levers
- lever
- 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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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
- B67B7/34—Hand-operated cutting devices with rotatable cutters
Definitions
- the present invention relates to a can opener with a rotating circular blade of the type used to open ordinary tin cans containing food preserves and the like.
- the invention also relates to a method for assembling the can opener.
- Conventional can openers having a circular blade generally include two levers made of metal plate that are pivoted in a scissor-like fashion toward one end and are provided with grip handles at the opposite ends.
- a knurled traction roller and a circular blade are mounted, respectively on the two levers, between the ends that lie opposite to the handles and the pivoting point, in positions that are equidistant from the pivoting point; during use of the can opener, the roller and the blade interact with the edge of the like of the can to be opened.
- the roller is connected to an actuation knob, generally by an axial pivot which is rotatably inserted into a frictionless bush associated with the respective lever.
- Italian utility model application no. VI94U000053 discloses a can opener having a flat reinforcement member fixed to the end of the lever of metal plate body that supports the roller.
- the reinforcement member is parallel and partially spaced relative to the lever body, so as to form a guiding slot for the corresponding end of the lever.
- Both the circular blade and the roller are generally coupled to meshing toothed wheels to transmit the motion between the two components.
- toothed wheels are usually mounted on the respective members with an interference mounting, by means of the pressure exerted by a screw, or by keying the toothed wheel on an axial appendage of the member.
- These types of mounting require very precise working tolerances and a particular care in assembling. It is also required to manipulate very small and numerous parts.
- a first drawback of conventional can openers is their high production cost also due to the fact that the assembly requires great labor and is scarcely automated.
- a further drawback is the poor reliability of the interference connection of the toothed wheels with their respective support members.
- FR 2296357 discloses a can opener having all of the features mentioned in the preamble of the enclosed claim 1, in which the drive assembly includes four separate pieces, namely a pivot, a gear, a blade and a nut.
- the main aim of the present invention is to eliminate the drawbacks mentioned above by providing a can opener that has a simple and economic structure and is constituted by a few and easily assembled parts.
- a further object is that of providing an assembly method of the can opener which can be performed with automatic apparatus in a reduced time and with minimum labor.
- a can opener with circular blade according to the invention comprises:
- a method for assembling can openers of the type comprising a pair of mutually associated levers having respectively a drive assembly and a cutting assembly adapted to interact, comprising the steps of:
- the configuration of the can opener according to the invention allows to considerably reduce production and assembly costs, ensuring higher reliability and strength with respect to known existing can openers.
- the can opener of FIG. 1 generally designated by the reference numeral 1, includes two levers or plates 2 and 3 made of pressed and/or drawn metal plate.
- Levers 2 and 3 are pivoted in a scissor-like fashion at a front end by a rivet 4 and are provided, at the opposite ends, with two handles 5 and 6 that have an elongated shape to be gripped by a user.
- levers 2 and 3 respectively rotatably support a drive assembly 7, that is suitable to interact with the edge of a can to make it rotate, and a cutting assembly 8 that includes a circular blade 9 that is meant to score the lid of the box, cooperating with the drive assembly 7.
- a particular characteristic of the can opener resides in that the drive assembly 7 is constituted only by a pair of mutually connected members mounted on the respective lever 2.
- drive assembly 7 is constituted by a knurled roller 10 that is connected to an actuation knob 11 by an axial pivot 12 that passes through a hole of the corresponding lever 12 and is arranged transversally to the surface thereof.
- Pivot 12 had an end rigidly associated with knob 11 and an opposite threaded end 12' engaged in an internal threading of knurled roller 10.
- Knob 11 of a per se known type, is made of plastic and has a central body 13, in which the head of axial pivot 12 is embedded, and a pair of wings 13' radially protruding from the central body.
- circular blade 9 is rotatably mounted on lever 3 on a rotation axis that is tilted with respect to the axis of knurled roller 10 of drive assembly 7, so that the cutting edge of the blade grazes the outer face thereof.
- Circular blade 9 is fixed to lever 3 by a second pivot 14 with an enlarged head and having an opposite end with lever3.
- drive assembly 7 before being mounted on lever 2, is formed by a toothed wheel 15 rigidly associated with knurled roller 10.
- cutting assembly 8 is formed by a second toothed wheel 16 rigidly associated with circular blade 9.
- Toothed wheels 15 and 16 are shaped so as to mutually mesh, in order to simultaneously turn roller 10 and blade 9 during the actuation of knob 11 by the user.
- Each one of the toothed wheels 15 and 16 has an axial polygonal, or square, hole 17, 18 for the insertion of respective tubular protrusions, or appendages, 19 and 20 formed on knurled roller 10 and on a circular blade 9 protrudes axially from them.
- the torsional locking of toothed wheel 15 and 16, respectively on roller 10 and on blade 9, is obtained by inserting the corresponding tubular protrusions 19 and 20 in the axial holes 17 and 18 of toothed wheels 15 and 16 and by punching and/or riveting the ends of protrusions 19 and 20 so as to expand them inside the holes 17 and 18 and form respectively a roller assembly 21 and a blade assembly 22, shown in FIG.s 4 and 5.
- FIG.s 6 and 7 illustrate the embodiment of the can opener according to the invention, which is simplified and cheaper than the preceding one and differs in the absence of toothed wheels coupled to the knurled roller and to the circular blade and in that the knurled roller and the axial pivot connecting to the knob are formed monolithically in one piece and define a single roller-pivot member 23, formed, for example, by matching and/or punching.
- Another particular characteristic of the invention resides in that the knurled roller 10' and the axial pivot for connection to the knob are formed monolithically, forming a monolithic roller-pivot part 23.
- Roller-pivot member 23 includes a roller portion 10' that is joined to a pivot portion 12' that is provided with longitudinal grooves 24 and is keyed in an axial hole 25 of a plastic knob 11'.
- Roller-pivot 23 can be rotatably mounted on the respective lever 2 without any intermediate member, such as for example the antifriction bushes used in the conventional can openers.
- Circular blade 9' on lever 3 is driven in its rotation by the friction exerted by the lid of the can on the blade itself during cutting.
- the structure of the can opener according to the invention allows a considerable constructive simplification and a reduction of the component parts. Besides reducing the assembly and production costs the can opener according to the invention is more reliable than similar conventional products.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Opening Bottles Or Cans (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Description
- The present invention relates to a can opener with a rotating circular blade of the type used to open ordinary tin cans containing food preserves and the like. The invention also relates to a method for assembling the can opener.
- Conventional can openers having a circular blade generally include two levers made of metal plate that are pivoted in a scissor-like fashion toward one end and are provided with grip handles at the opposite ends.
- A knurled traction roller and a circular blade are mounted, respectively on the two levers, between the ends that lie opposite to the handles and the pivoting point, in positions that are equidistant from the pivoting point; during use of the can opener, the roller and the blade interact with the edge of the like of the can to be opened.
- The roller is connected to an actuation knob, generally by an axial pivot which is rotatably inserted into a frictionless bush associated with the respective lever.
- Italian utility model application no. VI94U000053 discloses a can opener having a flat reinforcement member fixed to the end of the lever of metal plate body that supports the roller. The reinforcement member is parallel and partially spaced relative to the lever body, so as to form a guiding slot for the corresponding end of the lever.
- Both the circular blade and the roller are generally coupled to meshing toothed wheels to transmit the motion between the two components.
- These toothed wheels are usually mounted on the respective members with an interference mounting, by means of the pressure exerted by a screw, or by keying the toothed wheel on an axial appendage of the member. These types of mounting require very precise working tolerances and a particular care in assembling. It is also required to manipulate very small and numerous parts.
- A first drawback of conventional can openers is their high production cost also due to the fact that the assembly requires great labor and is scarcely automated.
- A further drawback is the poor reliability of the interference connection of the toothed wheels with their respective support members.
- FR 2296357 discloses a can opener having all of the features mentioned in the preamble of the enclosed claim 1, in which the drive assembly includes four separate pieces, namely a pivot, a gear, a blade and a nut.
- The main aim of the present invention is to eliminate the drawbacks mentioned above by providing a can opener that has a simple and economic structure and is constituted by a few and easily assembled parts.
- A further object is that of providing an assembly method of the can opener which can be performed with automatic apparatus in a reduced time and with minimum labor.
- This aim and this object are achieved by a can opener with circular blade according to claim 1 and by an assembling method according to
claim 2. - A can opener with circular blade according to the invention comprises:
- a pair of levers or plates that are mutually pivoted in a scissor-like fashions toward one end and are provided, at the opposite end, with two handles;
- a can drive assembly, which is mounted on one of the levers;
- a cutting assembly with a circular blade, which is mounted on the other one of the levers;
- the can opener being characterised in that the drive assembly is constituted by a first roller pivot member having an enlarged portion defining a knurled roller and a reduced portion defining a pivot for the interference coupling of a knob, the roller-pivot member being a monolithic member produced by machining or stamping and having longitudinal grooves on its reduced portion adapted to force into a dead hole of the knob.
-
- Further in accordance with the present invention, there if provided a method for assembling can openers of the type comprising a pair of mutually associated levers having respectively a drive assembly and a cutting assembly adapted to interact, comprising the steps of:
- a) forming a first lever;
- b) mounting a blade assembly, comprising at least one circular blade rotating at a pivot on the lever;
- c) forming a second lever;
- d) mounting a drive assembly on the lever, the drive assembly being constituted by a first roller pivot member having an enlarged portion defining a knurled roller and a reduced portion defining a pivot for the interference coupling of a knob, the roller-pivot member being a monolithic member produced by machining or stamping and having longitudinal grooves on its reduced portion adapted to force into a dead hole of the knob;
- e) pivoting the first and second levers at a connecting rivet.
-
- The configuration of the can opener according to the invention allows to considerably reduce production and assembly costs, ensuring higher reliability and strength with respect to known existing can openers.
- Further characteristics and advantages will become apparent from the detailed description of one of the preferred but not exclusive embodiments of the can opener according to the invention, with the aid of the accompanying drawings, wherein:
- FIG. 1 is a schematic side view of a can opener which is useful for understanding the invention;
- FIG. 2 is an exploded perspective view of two details of the can opener of FIG.1;
- FIG. 3 is an exploded perspective view of two further details of the can opener of FIG.1;
- FIG. 4 is a perspective view of the assembly formed by the parts shown in FIG.2 assembled together;
- FIG. 5 is a perspective view of the assembly formed by the parts shown in FIG.3 assembled together;
- FIG. 6 is an exploded side view of an alternative embodiment of a subassembly of the can opener of FIG.1, before assembly, which alternative embodiment forms the subject matter of the present invention as defined in the appended claims;
- FIG.7 is a side view of the subassembly of FIG.6 after assembly.
-
- With references to the above figures, the can opener of FIG. 1, generally designated by the reference numeral 1, includes two levers or
plates 2 and 3 made of pressed and/or drawn metal plate.Levers 2 and 3 are pivoted in a scissor-like fashion at a front end by a rivet 4 and are provided, at the opposite ends, with two handles 5 and 6 that have an elongated shape to be gripped by a user. - Between the front end and the pivoting rivet 4, levers 2 and 3 respectively rotatably support a drive assembly 7, that is suitable to interact with the edge of a can to make it rotate, and a cutting assembly 8 that includes a circular blade 9 that is meant to score the lid of the box, cooperating with the drive assembly 7.
- A particular characteristic of the can opener resides in that the drive assembly 7 is constituted only by a pair of mutually connected members mounted on the
respective lever 2. - Namely, drive assembly 7 is constituted by a
knurled roller 10 that is connected to anactuation knob 11 by anaxial pivot 12 that passes through a hole of thecorresponding lever 12 and is arranged transversally to the surface thereof. -
Pivot 12 had an end rigidly associated withknob 11 and an opposite threaded end 12' engaged in an internal threading ofknurled roller 10. -
Knob 11, of a per se known type, is made of plastic and has acentral body 13, in which the head ofaxial pivot 12 is embedded, and a pair of wings 13' radially protruding from the central body. - In the cutting assembly 8, circular blade 9 is rotatably mounted on lever 3 on a rotation axis that is tilted with respect to the axis of
knurled roller 10 of drive assembly 7, so that the cutting edge of the blade grazes the outer face thereof. Circular blade 9 is fixed to lever 3 by asecond pivot 14 with an enlarged head and having an opposite end with lever3. - In a first embodiment of the can opener of figure 1, drive assembly 7, before being mounted on
lever 2, is formed by atoothed wheel 15 rigidly associated withknurled roller 10. Similarly, cutting assembly 8 is formed by a secondtoothed wheel 16 rigidly associated with circular blade 9. -
Toothed wheels roller 10 and blade 9 during the actuation ofknob 11 by the user. - Each one of the
toothed wheels hole knurled roller 10 and on a circular blade 9 protrudes axially from them. - The torsional locking of
toothed wheel roller 10 and on blade 9, is obtained by inserting the corresponding tubular protrusions 19 and 20 in theaxial holes toothed wheels holes roller assembly 21 and ablade assembly 22, shown in FIG.s 4 and 5. - FIG.s 6 and 7 illustrate the embodiment of the can opener according to the invention, which is simplified and cheaper than the preceding one and differs in the absence of toothed wheels coupled to the knurled roller and to the circular blade and in that the knurled roller and the axial pivot connecting to the knob are formed monolithically in one piece and define a single roller-
pivot member 23, formed, for example, by matching and/or punching. - Another particular characteristic of the invention resides in that the knurled roller 10' and the axial pivot for connection to the knob are formed monolithically, forming a monolithic roller-
pivot part 23. - Roller-
pivot member 23 includes a roller portion 10' that is joined to a pivot portion 12' that is provided withlongitudinal grooves 24 and is keyed in anaxial hole 25 of a plastic knob 11'. - Roller-
pivot 23 can be rotatably mounted on therespective lever 2 without any intermediate member, such as for example the antifriction bushes used in the conventional can openers. - Circular blade 9' on lever 3 is driven in its rotation by the friction exerted by the lid of the can on the blade itself during cutting.
- The structure of the can opener according to the invention allows a considerable constructive simplification and a reduction of the component parts. Besides reducing the assembly and production costs the can opener according to the invention is more reliable than similar conventional products.
Claims (2)
- A can opener with circular blade, comprising: a pair of levers or plates (2, 3) that are mutually pivoted in a scissor-like fashion toward one end and are provided, at the opposite end, with two handles (5 ; 6); a can drive assembly (7), which is mounted on one of said levers (2); a cutting assembly (8) with a circular blade (9), which is mounted on the other one of the said levers (3); characterised in that said drive assembly (7) is constituted by a first roller pivot member (23) having an enlarged portion (10') defining a knurled roller and a reduced portion (12') defining a pivot for the interference coupling of a knob (11'), said roller-pivot member (23) being a monolithic member produced by machining or stamping and having longitudinal grooves (24) on its reduced portion (12') adapted to force into a dead hole (25) of said knob (11').
- A method for assembling scissor-like can openers of the type comprising a pair of mutually associated levers having respectively a drive assembly and a cutting assembly adapted to interact, comprising the steps of: a) forming a first lever; b) mounting a blade assembly, comprising at least one circular blade rotating at a pivot on said lever; c) forming a second lever; d) mounting a drive assembly on said lever, said drive assembly (7) being constituted by a first roller pivot member (23) having an enlarged portion (10') defining a knurled roller and a reduced portion (12') defining a pivot for the interference coupling of a knob (11'), said roller-pivot member (23) being a monolithic member produced by machining or stamping and having longitudinal grooves (24) on its reduced portion (12') adapted to force into a dead hole (25) of said knob (11'); e) pivoting said first and second levers at a connecting rivet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVI950062U | 1995-07-21 | ||
IT000062 IT239415Y1 (en) | 1995-07-21 | 1995-07-21 | IMPROVED CAN OPENER WITH DISC BLADE |
EP19960111496 EP0754647B1 (en) | 1995-07-21 | 1996-07-17 | Can opener with circular blade and assembling method thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960111496 Division EP0754647B1 (en) | 1995-07-21 | 1996-07-17 | Can opener with circular blade and assembling method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1024110A1 EP1024110A1 (en) | 2000-08-02 |
EP1024110B1 true EP1024110B1 (en) | 2003-04-02 |
Family
ID=11425753
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99125150A Expired - Lifetime EP1024110B1 (en) | 1995-07-21 | 1996-07-17 | Improved can opener with circular blade and assembly method thereof |
EP19960111496 Expired - Lifetime EP0754647B1 (en) | 1995-07-21 | 1996-07-17 | Can opener with circular blade and assembling method thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960111496 Expired - Lifetime EP0754647B1 (en) | 1995-07-21 | 1996-07-17 | Can opener with circular blade and assembling method thereof |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP1024110B1 (en) |
IT (1) | IT239415Y1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT239415Y1 (en) * | 1995-07-21 | 2001-02-26 | Barbara Gisolo | IMPROVED CAN OPENER WITH DISC BLADE |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0754647B1 (en) * | 1995-07-21 | 2000-10-18 | Barbara Gisolo | Can opener with circular blade and assembling method thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH589562A5 (en) * | 1974-12-23 | 1977-07-15 | Usbeck Monopolwerk & Soehne | |
NL8202461A (en) * | 1982-06-17 | 1984-01-16 | Wouden Adriaan Van Der | CAN OPENER. |
ATE159695T1 (en) * | 1990-08-03 | 1997-11-15 | Levene Ltd William | TIN OPENER |
GB9212170D0 (en) * | 1992-06-09 | 1992-07-22 | Mike & Kremmel Ltd | A can opener |
-
1995
- 1995-07-21 IT IT000062 patent/IT239415Y1/en active
-
1996
- 1996-07-17 EP EP99125150A patent/EP1024110B1/en not_active Expired - Lifetime
- 1996-07-17 EP EP19960111496 patent/EP0754647B1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0754647B1 (en) * | 1995-07-21 | 2000-10-18 | Barbara Gisolo | Can opener with circular blade and assembling method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0754647A1 (en) | 1997-01-22 |
EP1024110A1 (en) | 2000-08-02 |
IT239415Y1 (en) | 2001-02-26 |
EP0754647B1 (en) | 2000-10-18 |
ITVI950062V0 (en) | 1995-07-21 |
ITVI950062U1 (en) | 1995-10-21 |
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