US3719991A - Can openers - Google Patents

Can openers Download PDF

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Publication number
US3719991A
US3719991A US00155998A US3719991DA US3719991A US 3719991 A US3719991 A US 3719991A US 00155998 A US00155998 A US 00155998A US 3719991D A US3719991D A US 3719991DA US 3719991 A US3719991 A US 3719991A
Authority
US
United States
Prior art keywords
cutter
spindle
roll
seam
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.)
Expired - Lifetime
Application number
US00155998A
Other languages
English (en)
Inventor
M French
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.)
Crown Packaging UK Ltd
Original Assignee
Metal Box PLC
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 Metal Box PLC filed Critical Metal Box PLC
Application granted granted Critical
Publication of US3719991A publication Critical patent/US3719991A/en
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
    • B67B7/34—Hand-operated cutting devices with rotatable cutters

Definitions

  • the cutter spindle is monted at an acute angle to the traction roll axis, such that the cutter axis is aparallel to a face of the traction roll that engages the chuck or rear wall of the can seam.
  • This invention relates to can openers of the kind having a rotatable cutter which cuts through the seaming wall of the double seam securing a can end to a can body.
  • a rotatable cutter arranged to cut through the seaming wall of a double end seam by which a can end is secured to a can body;
  • a traction roll (wheel) having a chuck wall engaging face and a peripheral surface parallel to the axis of the traction roll and arranged to engage a curved portion connecting the seaming and chuck walls of a can end seam;
  • the cutter spindle is mounted substantially at right angles to the roll spindle;
  • a first abutment substantially parallel with the roll spindle and extending from a face of the housing at the trailing end thereof (considered in the direction of movement of the housing during a cutting operation), this abutment being such as to engage the top of the can end seam soas to tilt the housing about the roll spindle when the said peripheral surface of the traction roll is engaged with the top of the can end seam, whereby to determine the dive angle, which for the purposes of the present specification can be defined as the angle between a first plane, parallel to the roll spindle and containing a tangent to the cutting edge of the cutter at the point of first contact between the cutter edge and he can end seam, and a second plane containing the top of the can end seam;
  • (j) Means for moving the roll spindle axially to facilitate location of the traction roll and cutter relative to the can end seam.
  • the present invention is concerned basically with a can 3,719,991 Patented Mar. 13, 1973 Opener having features (s), (i) and (j), and such a can opener will be called herein a can opener of the kind specified.
  • One object of the invention is to provide, in a can opener of the kind specified, means whereby a smaller applied torque need be applied than in the prior art arrangement.
  • Another object is to enable a traction roll of reduced diameter to be used.
  • a further object is to provide a better bearing support for the cutter spindle than in the prior art arrangement.
  • Another object is to increase the bearing surface of the cutter spindle.
  • a further object is to reduce the end thrust on the lower end of the cutter spindle.
  • Yet another object is to reduce any tendency of the cutter to tilt during cutting.
  • a still further object is to facilitate accurate setting of the gap between the traction roll and the cutting edge.
  • a can opener has a rotatable cutter which cuts through the seaming wall of the double seam securing a can end to a can body. More specifically, the can opener has the nine features specified under (a), (b), (c), (d), (f), (g), (h), (i) and (j) in the section hereinbefore headed Description of the Prior Art.
  • the can opener has the cutter spindle mounted at an acute angle with respect to the roll spindle, said angle being such that the axis of rotation of the cutter is substantially parallel to the chuck wall engaging face of the traction roll in a plane containing the point of contact between that face and the can seam.
  • the invention makes it possible to bring the cutting edge closer to the axis of the roll spindle adjacent the traction roll, so that a traction roll of reduced diameter, in both the chuck wall engaging face and the peripheral surface, can be used. This enables a smaller applied torque to be used.
  • the can opener according to the invention may in addition have a buttress surface located between the cutting edge of the cutter and the cutter axis, so as to engage the seam during cutting and to constrain the cutting edge against penetration thereof through a layer of the end seam other than the outer layer.
  • the buttress surface may be frusta-conical.
  • Can openers according to the invention may be provided with a handle for holding the opener in one hand while the other hand operates the rotating means recited in (g) above; or the handle may be omitted; the opener may be of a wall-mounted or base-mounted type; the rotating means in (g) above may be power operated or manually operated.
  • a rotatable cutter arranged to cut through the seaming wall 11 (FIG. 4) of a double end sea-m 12 by which a can end 13 is secured to a can body 14;
  • a traction roll 15 having a chuck wall engaging face 16 and a peripheral surface 17 parallel to the axis of the traction wall 15 and arranged to engage the top surface 18 of the can seam formed on a curved portion connecting the seaming wall 11 and chuck wall 19 of the end seam 12;
  • reverse rotation of the handle 23 to the position shown in FIG. 2 causes pin 40 to move in s ot 41 so to draw the traction roll 15 into contact with the end seam 12, this positionbeing shown in FIG. 4.
  • the cutter spindle 20 is mounted at an acute angle E (FIG. 2) with respect to the roll spindle 21, such that the axis of rotation of the cutter 10 is substantially parallel to the chuck wall engaging face 16 of the traction roll in the plane 30 containing the point of contact between that face 16 and the chuck wall 19 of the seam.
  • the cutter spindle 20 is rotatable in a simple top bearing 31 and bottom bearing 32 formed in the housing 22.
  • the cutter itself has a fr-usto-conical peripheral face 33 which, at its uppermost point 34 in FIG. 2, is preferably parallel with the axis of the roll spindle 21 and which terminates in the cutting edge-27.
  • FIG. 4 illustrates how the surface 35 engages the wall 11; it serves to constrain the cutting edge 27 against penetration thereof through more than the outer layer of the seam.
  • the buttress surface 35 could alternatively be formed on a separate member coaxial with the cutter, or it may be fixed with respect to the housing 22.
  • the traction roll 15 may be integral with its spindle, but in the embodiment shown it is a separate member, screwed by a self locking thread 36 to the spindle 21.
  • the spindle in this case is of precision ground unhardened steel, the traction roll 15 being of hardened steel.
  • the faces 16 and 17 of the traction roll are serrated.
  • the ratio of the diameter of the face 17 of the traction roll to that of the cutting edge 27 is 1/4.
  • the opener of FIG. 1 is provided with a handle 37 for holding the opener in one hand while the other hand operates the butterfly handle 23.
  • the opener shown in FIG. 3 is without the handle 37 and may have instead a second abutment pin 38, to steady the opener on the can seam during the cutting operation.
  • a can opener comprising a housing, a rotatable cutter to cut through the seaming wall of a double end seam by Which a can end is secured to a can body, a cutter spindle mounted in the housing and carrying the cutter, a rotatable traction roll having a chuck Wall engaging face and a peripheral surface parallel to the traction roll axis to engage a cured portion connecting the seaming and chuck walls of a said seam, a roll spindle mounted in the housing and carrying the traction roll, means associated with one of the said spindles to effect rotation thereof, a first abutment parallel with the roll spindle and extending from the trailing end of the housmg so as to engage the top of a said seam whereby to tilt the housing about the roll spindle when said peripheral surface of the traction roll is engaged with the top of said seam, a second abutment on the housing to engage the can side, and means for moving the roll spindle axially to facilitate location of the traction roll and cutter relative to a
  • a can opener accordng to claim 1 having a buttress surface located between the cutting edge of the cutter and the cutter axis so as to engage a said seam during cutting and to constrain the cutting edge against penetration thereof through a layer of the end seam other than the outer layer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
US00155998A 1970-06-24 1971-06-23 Can openers Expired - Lifetime US3719991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3061070 1970-06-24

Publications (1)

Publication Number Publication Date
US3719991A true US3719991A (en) 1973-03-13

Family

ID=10310358

Family Applications (1)

Application Number Title Priority Date Filing Date
US00155998A Expired - Lifetime US3719991A (en) 1970-06-24 1971-06-23 Can openers

Country Status (2)

Country Link
US (1) US3719991A (enrdf_load_stackoverflow)
GB (1) GB1301592A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781989A (en) * 1972-06-01 1974-01-01 Westinghouse Electric Corp Can opener
US3808917A (en) * 1971-10-26 1974-05-07 Imp Knife Ass Co Inc Electric can opener
US5193298A (en) * 1992-01-27 1993-03-16 Oneill James A Fishing rod apparatus
US5289638A (en) * 1993-02-19 1994-03-01 Jack Chase Safety can opener
US6101727A (en) * 1998-05-11 2000-08-15 Chong; Wun C. Hand pump-action can opener
US6158130A (en) * 1999-02-04 2000-12-12 Chong; Wun C. Industrial can opener
USD459962S1 (en) 2001-11-09 2002-07-09 Canpacific Engineering Inc. Household can opener
US6671970B2 (en) 2002-01-29 2004-01-06 Canpacific Engineering Inc. Can lid lifter for can opener
US6675487B2 (en) * 2001-12-28 2004-01-13 Shun So Can opener
US20070044325A1 (en) * 2005-08-31 2007-03-01 Canpacific Engineering Inc. Direct drive industrial can opener
USD538118S1 (en) 2005-08-31 2007-03-13 Canpacific Engineering Inc. Direct drive can opener
US20180118546A1 (en) * 2016-11-01 2018-05-03 Alston Technologies Development Co., Ltd. Adjustable can opener

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808917A (en) * 1971-10-26 1974-05-07 Imp Knife Ass Co Inc Electric can opener
US3781989A (en) * 1972-06-01 1974-01-01 Westinghouse Electric Corp Can opener
US5193298A (en) * 1992-01-27 1993-03-16 Oneill James A Fishing rod apparatus
US5289638A (en) * 1993-02-19 1994-03-01 Jack Chase Safety can opener
US6101727A (en) * 1998-05-11 2000-08-15 Chong; Wun C. Hand pump-action can opener
US6158130A (en) * 1999-02-04 2000-12-12 Chong; Wun C. Industrial can opener
USD459962S1 (en) 2001-11-09 2002-07-09 Canpacific Engineering Inc. Household can opener
US6675487B2 (en) * 2001-12-28 2004-01-13 Shun So Can opener
US6671970B2 (en) 2002-01-29 2004-01-06 Canpacific Engineering Inc. Can lid lifter for can opener
US20070044325A1 (en) * 2005-08-31 2007-03-01 Canpacific Engineering Inc. Direct drive industrial can opener
USD538118S1 (en) 2005-08-31 2007-03-13 Canpacific Engineering Inc. Direct drive can opener
US20180118546A1 (en) * 2016-11-01 2018-05-03 Alston Technologies Development Co., Ltd. Adjustable can opener
US10233066B2 (en) * 2016-11-01 2019-03-19 Alston Technologies Development Co., Ltd. Adjustable can opener

Also Published As

Publication number Publication date
GB1301592A (enrdf_load_stackoverflow) 1972-12-29

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