CN1182405A

CN1182405A - Can opener

Info

Publication number: CN1182405A
Application number: CN 95197836
Authority: CN
Inventors: 约瑟夫·奥古斯丁·特伦斯·佩雷拉
Original assignee: William Levene Ltd
Current assignee: William Levene Ltd
Priority date: 1995-03-21
Filing date: 1995-03-21
Publication date: 1998-05-20
Anticipated expiration: 2015-03-21
Also published as: CN1066125C

Abstract

A can opener has two relatively pivotable body portions, one carrying a rotary cutting wheel and the other a rotary traction wheel having parallel axes, the opener being arranged to receive the rim of a can between the two wheels and to orbit the can as the traction wheel is rotated while the cutting wheel makes a peripheral cut, the traction wheel being shaped to distort the rim during cutting and the cutting wheel having an outwardly angled body portion, adjacent its cutting tip, the angled body portion being adapted to contact the outside of the rim below the cut to exert a force in the opposite direction to the traction wheel.

Description

Tin opener

The present invention relates to a kind of Tin opener lid, it can from outside incision can one end form upright have jar end wall and sidewall circumference change the limit part edge and the end wall or the lid of jar cut off.

This tin opener disclosed in European patent bulletin EP-A-169224.Opener comprises that one is equipped with shearing wheel with two base portions of bearing pin bonded assembly, and another is equipped with drive wheel, when using opener the edge of can be opened is between the two-wheeled.Wheel axis is parallel to each other.Cut around the whole periphery of edge even a problem of this opener is an opener, the end wall of cut-out still is difficult to take off.In above-mentioned patent, propose to be provided with to be independent of the device of shearing wheel in order to take off the end wall of cutting.Opener has the hook that gets loose in one embodiment for this reason, has the lever that can make the distortion of can sidewall in another embodiment.

In our International Patent Application WO 92/02445, we point out can and it be taken off easily from jar with the end wall cut-out by the shape of the part of the edge of suitable selection supporting can.

Therefore, the opener that in WO 92/02445, has proposed a kind of upright edge that can form at an end of jar from outside incision and end wall is cut off from tank body, edge comprises the repeatedly limit part of the end wall and the sidewall circumference of jar, tin opener comprises two base portions that can relatively rotate installation around an axle, one is equipped with rotating shearing wheel and another is equipped with rotating drive wheel, the axis of wheel is positioned at same vertical plane surface (also parallel with the main shaft of tank body when clipped position) parallel to each other, in use, the edge of jar is placed between the opener two-wheeled, opener rotated around jar when drive wheel rotated, meanwhile shearing wheel cuts out circumferential notch in the outside of jar edge, and the shape of drive wheel can make jar edge distortion and then make the repeatedly limit interlock between jar end wall and the sidewall loosening when shearing wheel is sheared the jar edge.

In order to make a jar edge distortion in use, the part surface of drive wheel preferably engages with the madial wall of edge, and this surface should be greater than the inclination angle of edge with respect to the inclination angle of the vertical axis of jar.

The change separating effect on limit of end wall that the shape that we find to change among the WO 92/02445 the tin opener shearing wheel that proposes can further be improved jar and sidewall interlock.

Therefore, the present invention proposes a kind of upright edge that can form at an end of jar from outside incision and with the tin opener of end wall with the tank body cut-out, the jar edge comprises the repeatedly limit part of the end wall and the sidewall circumference of jar, tin opener comprises two base portions that can relatively rotate installation around an axis, rotating shearing wheel is housed for base portion and another base portion is equipped with rotating drive wheel, the two-wheel axis is in vertical plane surface (in clipped position time also parallel with the main shaft of tank body) parallel to each other, in use, the jar edge is placed between the opener two-wheeled, opener rotated around jar when drive wheel rotated, meanwhile shearing wheel cuts out the otch along circumference in the jar edge outside, when shearing wheel is sheared the jar edge, thereby the shape of drive wheel can make jar edge distortion make the repeatedly limit interlock between jar end wall and the sidewall loosening, shearing wheel is having an outward-dipping part near the shear blade place, this part contacts with the jar edge outside under being positioned at shearing point, thereby applies an application force to the jar edge on the direction opposite with drive wheel.

Because the effect of this contact, jar is maintained at the stable position that its main shaft parallels with the two-wheeled axis.

Although the two-wheel axis is parallel to each other in a vertical surface substantially, the cutting head of shearing wheel can be in one second vertical plane surface, with drive wheel and tank body axis at angle, this angle is preferably between 5 ° to 12 °.

This measure has been arranged, can impel to be sheared the jar edge metallo-separation that wheel downcuts.

The part of band gradient is preferably around the whole circumference of shearing wheel.

In a preferred embodiment, the lower end of band gradient part is a flange or shoulder, and the outside face of flange is the periphery with the vertical shaft parallel of shearing wheel.Suitably choose the size of flange, can abut against the side of jar under jar edge so that tank body keeps stable at shear history flange outside face with respect to the shearing wheel shear blade.

In order to make a jar edge distortion, the part surface of drive wheel preferably engages with the madial wall of edge in use, and this surface should be greater than the inclination angle of jar edge with respect to the inclination angle of the vertical axis of jar.

The rotation of drive wheel preferably can drive shearing wheel and do passive rotation.

By selecting suitable being positioned to shear the shape of locating shearing wheel under the circumference, jar more firmly can be remained on the desired position and undesirable rotation or rotation can not occur.Shearing wheel jar relatively is in offset position, leans against on the better rigidity edge, like this than good on the thin-walled that leans against tank body.

To and narrate embodiments of the invention in conjunction with the accompanying drawings by example below.Accompanying drawing comprises:

Fig. 1 is the backplan of an embodiment of tin opener of the present invention;

Fig. 2 is the section-drawing along X-X line among Fig. 1;

Fig. 3 is the partial enlarged drawing of Fig. 2, is depicted as the detailed structure of the jar edge and the shearing wheel of the present invention that are in clipped position;

Fig. 4 is a partial view embodiment illustrated in fig. 1;

Fig. 5 is the part sectional view along Y-Y line among Fig. 2;

Fig. 6 a is that Fig. 6 b is the part sectional view of jar edge after cutting not by the part sectional view of the jar edge of tin opener incision among Fig. 1-5.

Fig. 6 a is depicted as can C to be opened, and it has the upright edge R along circumference, and edge has towards the top T of top with towards the bottom of below U.Edge R be by the end wall E of jar and jar the circumferential edges of end of the sidewall S part that coincides constitute.

Tin opener shown in the figure can be gripped by hand of user, and it comprises relatively large first base portion 1 and relative less second base portion 3 that has clamping lever part 4 that has handle portion 2 of size.Two base portions 1,3 are respectively casting spares.In the U type dimple of the bottom surface of main body 1, be equipped with screw 6 and be fixed on die cast metal inserts 5 on the main body 1.Connector bushing 5A on the inserts 5 passes two base portions two base portions is linked together in rotating repeatedly dress mode.

Two base portions 1,3 of tin opener can be done between relative off position and open position and relatively rotate, abut against each other at the handle 4 of graphic off position main body 3 and the handle 2 of main body 1, do not having two handles of graphic open position to remove.

Do rotatable the installation on the axle sleeve 9 of shearing wheel 7 in the groove 9A of damascene part 5.Shearing wheel 7 comprises ring-type shear blade body 10 that protrudes groove 9A and the flange 11 that outwards extends bottom.Sword body 10 comprises two inclined-

plane

10a and 10b, and as Fig. 3, intersection, two inclined-planes forms shear blade.These two parts are asymmetric, and promptly first half 10a inclination angle is less, and for example the angle with horizontal surface is 5 °, and lower part 10b is relative, and horizontal surface is steeper, and angle is preferably in about 55 ° between 45 °-65 °.It is good and shearing force is minimum that such configuration is proved the durability of shear blade.Also having its effect of inclined-plane 7a on shearing wheel 10a part is to produce a gap between shearing wheel and drive wheel, and this point back also can be described in detail.

Shearing wheel also has the 10c part below sword body portion 10, it to evagination, forms the inclined-plane on away from the direction of shear blade.This section band gradient part 10c is connected with foregoing flange 11 by the short less band gradient part 10d of gradient.

The leaning angle of chamfered portion 10c and shearing wheel longitudinal axis can be between 5 ° to 20 °, and the leaning angle of chamfered portion 10d can be between 25 ° to 35 °.

Flange 11 has the outer ring surface 11a parallel with the shearing wheel longitudinal axis.

Drive wheel 12 is included in the bearing pin 13 that passes main body 1 away from handle one end.Bearing pin 13 can rotate in axle sleeve 14.T type handwheel 15 is equipped with rotating drive wheel 12 in the top of bearing pin 13, between the bottom surface of handwheel 15 and first base portion 1 and its facing surfaces split circlip and spring washer is housed.Drive wheel 12 comprises down frusto-conical portion 17, as shown in Figure 3.

Can a jar edge R all be arranged for most of can of consumption at present, about 8 ° to 10 ° of the vertical axis deflection of its medial surface and jar.We find suitably to select the shape of drive wheel frusto-conical portion 17, so that make the crooked or angle bigger than this angle of deflection laterally of jar edge R when shearing, frictional engagement power residual between the jar edge wall of otch both sides can be destroyed.This flecition also can be destroyed glue or similar sealer and jar interior plastics or the similar coating material in jar edge.Thereby the oblique angle of 17 parts should be chosen as at least greater than about 10 °.The maximum inclination angle should make under this angle a crooked jar edge should not cause drive wheel to rotate effort, and this point is even more important, because of tin opener is a type hand.

Frusto-conical portion 17 has rib line 18 makes it have Clamping force.

Consult Fig. 4 and Fig. 5, the bottom surface of base portion 1 be equipped with substantially be the back plate 20 of plane U type, the centre portion 21 of U template be recessed into and perforate is arranged so that foregoing bearing pin 13 therefrom passes.The center that drive wheel 12 is contained in the U type reaches than the more lower slightly position of U template lowest surfaces.

As shown in Figure 4, shearing wheel partly is between two opening arms of U type when base portion is in the closed position, forms a gap d-d to put a jar edge R between two-wheeled.

As shown in Figure 5, back plate 20 has two opposed ends 22 as U type two ends arm.Its edge R is between drive wheel 12 and the shearing wheel 7 when can is put into, and the top that end 22 leans against jar with

contact point

23 and 24 is to guarantee lid or the end E of drive wheel axis perpendicular to jar.Contact point on the shearing point both sides has produced the downward pressure of crossing over drive wheel, and this power is illustrated as acting on the antagonistic force F/2 of the power F that makes progress that the balance shear history produces on each contact point in the drawings.

But be appreciated that curvature owing to jar, and the offset d-d between power F and the F/2, jar has the bevelled possibility, shown in arrow A among Fig. 4.The band gradient surface 10c of shearing wheel is close to the undesirable inclination rotation that jar edge can prevent that these factors from causing.Because be adjacent to a little is to lean against on jar edge rather than on the thin-walled of jar, jar can not be out of shape so can stop this inclination to be rotated.Owing to prevented the inclination of jar, jar edge can remain on stable position thereby shear blade can be sheared in correct position, distance edge top.

As shown in the figure, the axis vertical or rotation axis and drive wheel and tank body of shearing wheel is inclined to about 8 ° angle D mutually.

During use, the user at first rotates base portion to open position, and the edge R of jar C is placed gap between drive wheel and the shearing wheel, and promptly blade clearance d-d (Fig. 3) makes two base portions forward graphic closed condition to as using scissors then.

Forward closed condition fully to base portion, the top in shear blade contact and the incision jar edge R outside, frusto-conical portion 17 is supporting edge from the inside face of edge, and simultaneously the band gradient part 10c of shearing point below engages with the outside of edge R and it is applied to the inside power (Fig. 3).Two handle portions involutory plays locking action, and to prevent to act on power on the edge excessive and the horizontal clearance between drive wheel and the shearing wheel remained on fixing distance.

Drive passive shearing wheel when drive wheel 12 rotates, and owing to have the otch that shear blade 10 cuts out the spiral jar edge of incision vertically downward of existing of angle " D " the top margin T of edge upwards to be separated with the bottom of edge R until sword body portion 10a.Shearing wheel is proceeded to shear, and maintenance is parallel with the top of edge, and shear blade 10 can be separated end wall E and sidewall S notching edge in the mode of agricultural ploughshare.Frusto-conical portion 17 applies an outside downward component of force that makes edge R distortion or bending together with shear blade 10 to the jar edge, and the antagonistic force that surperficial 10c applied simultaneously also can strengthen being cut the separating effect of edge.Such power is synthetic can to remain on the jar edge settling position thereby shear blade 10 effectively and can cut off the outer of R and make and be cut part T and upwarp.Then can be with opener by taking off on the can, lid can be taken with hand and to stay bright and clean sheared edge.

Fig. 6 a and Fig. 6 b are depicted as before the unlatching and the contrast of the can after opening.Can know by Fig. 6 b and to see, shear trailing edge and produced appropriate distortion thereby only just end wall E can have been need not to use other accessories by taking off on the tank body with hand.

Claims

1. A can opener capable of separating the end wall from the body of the can by cutting into an upstanding rim formed at one end of the can from the outside, the rim comprising the lapped portion of the circumference of the end wall and the side wall of the can, the can opener comprising a Two main body parts that are relatively rotatably installed around an axis, one main body part is equipped with a rotatable shearing wheel and the other main body part is equipped with a rotatable driving wheel, and the axes of the two wheels are parallel to each other in the same vertical plane (in In the shearing position, it is also parallel to the main axis of the tank body). When in use, place the tank rim between the two wheels of the opener. When the driving wheel rotates, the opener rotates around the tank. The side cuts a circumferential incision, and the shape of the drive wheel can deform the can rim when the shear wheel shears the can rim, thereby loosening the overlapping seam between the can end wall and the side wall, and the shear wheel has a band near the cutting edge. The portion of the slope that contacts the outside of the rim below the shear point and thus exerts a force on the rim in a direction opposite to that of the drive wheel.

2. A can opener as claimed in claim 1 wherein the shear head of the shear wheel lies in a vertical plane at an angle to the drive wheel and the axis of the can body.

3. A can opener as claimed in claim 2 wherein the angle is between 5° and 12°.

4. A can opener as claimed in claim 1, 2 or 3 wherein the tapered portion surrounds the entire circumference of the shear wheel.

5. A can opener as claimed in any one of the preceding claims wherein the lower end of the tapered portion is a flange or shoulder surrounding the wheel, the outer surface of the flange or shoulder being parallel to the longitudinal axis of rotation of the shear wheel .

6. A can opener as claimed in any one of the preceding claims, wherein the drive wheel has a portion which, in use, has a surface which, in use, lies against the inside of the rim of the can, the surface being inclined at a greater angle to the vertical axis of the can than the The inclination of the edge to the axis.

7. A can opener according to any one of the preceding claims, wherein the rotation of the drive wheel can drive the shear wheel to rotate passively.

8. A can opener according to any one of the preceding claims, characterized in that the shearing wheel has an annular shearing blade body consisting of two sloped parts, the intersection of which forms a cutting edge, the two sloped parts Some are asymmetrical in shape.

9. The can opener according to claim 8, wherein the angle between the lower inclined surface and the horizontal plane is between 45°-65°, and the angle between the upper inclined surface and the horizontal plane is smaller.

10. A can opener as claimed in claim 5, 8 or 9, characterized in that the shearing wheel has a further portion below the blade portion which is outwardly convex away from the cutting edge and which passes through a The shorter, less tapered portion is connected to the flange.

11. A can opener as claimed in any one of the preceding claims wherein the drive wheel has a frusto-conical portion in contact with the rim of the can.

12. A can opener as hereinbefore described with reference to and shown in the accompanying drawings.