US3841029A - Apparatus for chamfering tablets - Google Patents

Apparatus for chamfering tablets Download PDF

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Publication number
US3841029A
US3841029A US00268106A US26810672A US3841029A US 3841029 A US3841029 A US 3841029A US 00268106 A US00268106 A US 00268106A US 26810672 A US26810672 A US 26810672A US 3841029 A US3841029 A US 3841029A
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US
United States
Prior art keywords
tablets
channels
angle
grinding
guiding member
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
US00268106A
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English (en)
Inventor
H Saeki
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.)
Shionogi and Co Ltd
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Shionogi and Co Ltd
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Filing date
Publication date
Application filed by Shionogi and Co Ltd filed Critical Shionogi and Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/22—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts
    • B24B5/225—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work for grinding cylindrical surfaces, e.g. on bolts for mass articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/005—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor for mass articles
    • 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
    • Y10T29/00—Metal working
    • Y10T29/44—Filing

Definitions

  • ABSTRACT An apparatus for chamfering the sharp circumferential edges of tableted article.
  • the apparatus has a rotating disk rotatably mounted on a stationary frame and having a grinding or abrading surface which is sufficiently hard and rough to scrape the tablets.
  • a guiding member which is disposed above said surface, is composed of two end working segments and an intermediate segment having a plurality of grooved channels extending over the full length of the guiding member.
  • the grooved channels are provided with inlets and outlets for the tablets at opposite ends of the channels, said channels being opened towards said grinding or abrading surface. Portions of each of said grooved channels which correspond to both of said working segments have a cross-section permitting unobstructed passage of the tablets while holding them.
  • each of said channels which corresponds to said intermediate segment is twisted in the direction of its length to change the orientation of the tablets from the position where one of its edges rests against the grinding or abrading surface to the position where the other edge rests against the grinding or abrading surface.
  • These channels also have a somewhat narrowed but deepened and continuously changing cross-section to smoothly permit said change of tablet orientation.
  • the present invention generally relates to an apparatus for preparatory treatment of tableted articles. More particularly, it concerns an apparatus for scraping sharp circumferential edges of the tablets formed by a tableting press as a thickset cylinder optionally with spherical ends, to improve the shape of such tablets so that they are more like ellipsoids or spheres.
  • tablets in general, are shaped such that each has an external form which resembles a sphere or an ellipsoid with a rounded sperical edge which facilitates coating with sugar or cellulosic material after they are molded.
  • the tablet which is to be coated has a shape wherein its sharp circular edges have been removed or at least the sharpness of the edge lines have been reduced.
  • a method wherein the shapes of the concave operative heads of the punches are modified so as to have a compound concave shape composed of a double or multiple sphere According to this method, however, the construction of the punches become very complicated with a consequent high production and/or tooling cost of the punches and shortening of the sevice life of the punches.
  • an apparatus for chamfering tableted articles comprising; a stationary frame, rotating disk rotatably mounted on said stationary frame and having a grinding or abrading surface which is sufficiently hard and rough to scrape the tablets, a means for driving said disk, and a guiding member disposed above said surface, being composed of two working segments with an intermediate segment disposed therebetwecn and having a plurality of grooved channels extending over the full length of the guiding member with inlets and outlets for the tablets at opposite ends of the channels and opened towards said grinding or abrading surface.
  • each of said grooved channels which correspond to both of said working segments have a cross-section permitting unobstructed passage of the tablets while holding the tablets oriented in a predominantly upright yet slightly inclined position with one of the sharp edges of the tablet being directed towards the surface of the disk.
  • a portion of each of said channels which corresponds to said intermediate segment is twisted in the direction of its length to change the orientation of the tablets from the position where one edge of the tablet rests against the grinding or abrading surface to the position where the other edge of the tablet rests against the grinding or abrading surface.
  • the channels in the intermediate segment have a somewhat narrowed but deepened and continuously changing cross-section to smoothly permit said change of the orientation.
  • a bracket is mounted on said stationary frame for holding said guiding member.
  • grinding members of hard stainless steel or tool steel treated with hard chrome plating, are generally preferred, although any roughened surfaces having sufficient hardness and ruggedness for scraping the circumferential edges of the compacted tablets can be employed.
  • the guiding member of the present invention is disposed closely above the grinding or abrading surface of the rotating disk, allowing a small clearance between them, which clearance is finely adjustable by a holding bracket fixedly mounted on the stationary frame.
  • the guiding member is composed of an integral body of functionally differentiated three segments, Le, a first working segment, an intermediate segment and a second working segment.
  • Each of the grooved channels formed on the guiding member and opened towards the grinding or abrading surface is one which is capable of holding the tablet in a generally upright but somewhat inclined posture or status, or in other words, holding the tablet in a generally upright position with a moderate angle of inclination with respect to the grinding or abrading surface.
  • either one or the other of the circular edges of the tablets is always in good contact with said surface in both of its working segments.
  • angle of orientation of the tablet may not be specifically restricted and may be varied with the original shape of the tablet so long as the sharp circular edges of the tablets can effectively be scraped during the transferring through the grooved channel, an angle between about and 40, preferably. one between about 20 and 35, with respect to a line perpendicular to the grinding or abrading surface is desirable for effective production and convenience of toolmg.
  • the angle of orientation may be varied over the length of the channel to obtain a rounded edge.
  • it is usually fixed for the convenience of tooling, and even in the case of a fixed orientation, a satisfactory result can be obtained because of the small clearance between the tablet and the side walls of the grooved channel.
  • each of the grooved channel which corresponds to the intermediate segment must be twisted in the direction of its length and have a somewhat narrowed but deepened and continously changing cross-section so that the angle of orientation of the travelling tablet is reversed within this portion.
  • each of the grooved channels which correspond to the both working segments must be capable of transferring said tablets therethrough in a direction which intersects the derection of movement of the grinding or abrading surface at an angle other than a right angle.
  • This angle of intersection is very important because it determines the component force due to the rotational movement of the grinding or abrading surface with which the tablets are in contact and exerted on the tablets. Therefore, an angle between about and 50, preferably one between about and 45 has been found to be particularly effective.
  • this angle of intersection may preferably be constant over the full length of the grooved channel used for chamfering.
  • each centerline of the grooved channels may preferably be spirally contoured so that they intersect, at every point which constitute the centerline, with tangents of the every circles which constitute the disk at a given angle, even through a simple straight line may optionally be used.
  • the apparatus of the present invention is used together with a tablet aligning means which is integrally annexed to the first working segment at the inlet portion of the grooved channels and including a plurality of twisted'tunnels.
  • the purpose and/or function of this means is to feed the tablets into the grooved channels by first evenly aligning the randomly stuffed or scattered tablets and then errecting them during their travels within the twisted tunnels.
  • these major components of the apparatus including the aligning means may preferably be tilted in order to insure the smooth transferring of the tablet through the grooved channels and tunnels, particularly through those within the aligning means and the intermediate segment of the guiding member.
  • the angle of such tilting with respect to the horizontal plane may be larger than about 45, preferably larger than about
  • rotating disk 1 is mounted on a stationary fame (F of FIG. 5) and has a grinding or abrading surface 12 disposed over the full surface thereof except on a mounting portion 11 of the core.
  • the disk is rotatably driven in the direction of the arrow by a driving means (not shown).
  • a guiding member 5 is disposed above said grinding or abrading surface 12 and is held in this position by a bracket (not shown) which can be fixedly mounted on the stationary frame. The clearance between the member 5 and the surface 12 is adjustable by said bracket.
  • the member 5 is an integral body of the functionally classifiable three segments; namely, a first working segment 51, an intermediate segment 52 and a second working segment 53.
  • the guiding member 5 also has five grooved channels 61, 62-65 (indicated generally by broken lines except the cut-out portions) which equally open toward said grinding or abrading surface 12 and run substantially parallel with each other, extending through the respective segments 51, 52 and 53 from inlets for the tablets 71, 72-75 at the end of the first working segment 51 to outlets 81, 82-85 at the opposite end of the second working segment 53.
  • Each centerline of the grooved channels 61, 62-65 is preferably spirally contoured, within both of the working segments 51 and 53, so that it intersects, at every point which constitutes the centerline, with the tangents of every circle which constitutes the disk at approximately 40.
  • a portion of each centerline which corresponds to the intermediate segment 52 of the guiding member 5 may be a straight line for connecting both curved portions which correspond to working segments 51 and 53, it may preferably be a gradual curve for smoothly connecting both of said curved portions as shown in the drawing.
  • each of the grooved channels 61, 62-65, within the portions of the both working segments 51 and 53, is so designed that it permit unobstructed passage of the tablet while holding the tablets oriented in a predominantly upright yet slightly inclined (about with respect to a line perpendicular to the grinding or abrading surface) position with one of its sharp edges inclined towards the surface 12 of the disk 1 as specifically shown in the sectional views of FIGS. 2 and 4, where the tablets are inclined in opposite directions.
  • each of the grooved channels 61, 62-65 which corresponds to the intermediate segment 52 of the guiding member 5 is designed to connect together those portions of said channels which correspond to the working segments 51 and 53 and to have the ability of reversing the angle of orientation of the tablets with respect to the grinding or abrading surface 12 during their conveyance through this portion, said portion must be twisted in the direction of its length.
  • each of the grooved channels 61, 62-65 is designed to have a somewhat narrowed but deepened and continuously changing crosssection. This facilitates errecting the tablets from their oriented postures and then inclining them from their upright postures to their oppositely oriented postures, as best shown in the sectional views of FIGS. 3a through Be.
  • the tablet T is then pushed into the portion of each of the grooved channels which corresponds to the intermediate segment 52 where its angle of orientation is reversed.
  • the tablet T is switched from this portion to the next portion of each of the grooved channels which corresponds to the second working segment 53, its other circular edge is scraped while being transferred along this portion.
  • the tablet is expelled from one of the outlets 81, 82-85.
  • a plane of the essential part of the apparatus including the annexed tablet aligning means 9 is actually tilted forward with respect to the horizontal plane at about a 60 angle. Therefore, the tablet can be even transferred smoothly by the aid of gravity through such portions as the tunnels of the aligning means and the portions of the grooved channels which correspond to the intermediate segment, where no component force due to the rotating movement of the grinding or abrading surface is exerted on the tablets.
  • An apparatus for chamfering the sharp edges of tableted articles comprising; a stationary frame, a rotating disk rotatably mounted on said stationary frame and having a grinding or abrading surface which is sufficiently hard and rough to scrape the tablets; a means for driving said disk; a guiding member disposed above said surface, being composed of a working segment on each side of an intermediate segment and having a plurality of grooved channels extending over the full length of the guiding member with inlets and outlets for the tablets at opposite ends of the channels, said channels being opened towards said grinding or abrading surface, with portions of each of said grooved channels which correspond to both of said working segments having a cross-section permitting unobstructed passage of the tablets while holding the tablets oriented in a predominantly upright yet slightly inclined position with one of the sharp edges being directed towards the surface of the disk, and a portion of each of said channels which corresponds to said intermediate segment being twisted in the direction ofits length to change the orientation of the tablets from a position where one edge is disposed against the grinding or abrading surface to
  • each center line of the grooved channel is spirally contoured within the working segments so that it intersect, at all the points which constitute the center line, with tangents of all the circles which constitute the disk at a substantially constant angle other than a right angle.
  • a tablet aligning means which is integrally annexed to the first working segment at the inlet portion of the grooved channels and which comprises a plurality of twisted tunnels which are capable of feeding the tablets into the grooved channels by first evenly aligning the randomly stuffed or scattered tablets and then errecting them during their travels within the twisted tunnels.
  • bracket for holding said guiding member is capable of adjusting the clearance between the guiding member and the abrading surface or the disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Basic Packing Technique (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US00268106A 1972-03-29 1972-06-30 Apparatus for chamfering tablets Expired - Lifetime US3841029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47031353A JPS4899079A (enrdf_load_stackoverflow) 1972-03-29 1972-03-29

Publications (1)

Publication Number Publication Date
US3841029A true US3841029A (en) 1974-10-15

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Application Number Title Priority Date Filing Date
US00268106A Expired - Lifetime US3841029A (en) 1972-03-29 1972-06-30 Apparatus for chamfering tablets

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US (1) US3841029A (enrdf_load_stackoverflow)
JP (1) JPS4899079A (enrdf_load_stackoverflow)
CA (1) CA964862A (enrdf_load_stackoverflow)
CH (1) CH546574A (enrdf_load_stackoverflow)
DE (1) DE2226356A1 (enrdf_load_stackoverflow)
FR (1) FR2177666B1 (enrdf_load_stackoverflow)
GB (1) GB1345990A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013103211A1 (de) 2013-03-28 2014-10-02 Endress + Hauser Flowtec Ag Magnetisch-induktives Durchflussmessgerät
DE102013114427A1 (de) 2013-12-19 2015-06-25 Endress + Hauser Flowtec Ag Anordnung und Verfahren zur Bestimmung einer durchflussbezogenen Messgröße

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182428A (en) * 1959-12-17 1965-05-11 Fafnir Bearing Co Apparatus for grinding a bevel on circular objects
US3348338A (en) * 1963-03-15 1967-10-24 Messerschmidt Scbastian Apparatus for lapping and grinding balls
US3561164A (en) * 1966-02-24 1971-02-09 Litton Industries Inc Abrasive adjustment control for double disc grinder
US3668751A (en) * 1969-06-30 1972-06-13 Shionogi & Co Apparatus for chamfering tablets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728045A (en) * 1971-09-22 1973-04-17 United Aircraft Corp Helicopter blade

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182428A (en) * 1959-12-17 1965-05-11 Fafnir Bearing Co Apparatus for grinding a bevel on circular objects
US3348338A (en) * 1963-03-15 1967-10-24 Messerschmidt Scbastian Apparatus for lapping and grinding balls
US3561164A (en) * 1966-02-24 1971-02-09 Litton Industries Inc Abrasive adjustment control for double disc grinder
US3668751A (en) * 1969-06-30 1972-06-13 Shionogi & Co Apparatus for chamfering tablets

Also Published As

Publication number Publication date
JPS4899079A (enrdf_load_stackoverflow) 1973-12-15
CA964862A (en) 1975-03-25
DE2226356A1 (de) 1973-10-18
FR2177666B1 (enrdf_load_stackoverflow) 1974-02-15
GB1345990A (en) 1974-02-06
CH546574A (de) 1974-03-15
FR2177666A1 (enrdf_load_stackoverflow) 1973-11-09

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