US3668962A - Web-cutting apparatus - Google Patents

Web-cutting apparatus Download PDF

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Publication number
US3668962A
US3668962A US36595A US3668962DA US3668962A US 3668962 A US3668962 A US 3668962A US 36595 A US36595 A US 36595A US 3668962D A US3668962D A US 3668962DA US 3668962 A US3668962 A US 3668962A
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US
United States
Prior art keywords
web
drum
cutter arm
slot
cam
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
US36595A
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English (en)
Inventor
Eric George Arthur Chapman
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford Ltd
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 Ilford Ltd filed Critical Ilford Ltd
Application granted granted Critical
Publication of US3668962A publication Critical patent/US3668962A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material
    • G03D15/04—Cutting; Splicing
    • G03D15/043—Cutting or splicing of filmstrips
    • G03D15/046—Automatic cutting
    • 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
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4734—Flying support or guide for work
    • 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
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4769—Work feeder mounted on tool support
    • Y10T83/4772—Gripper-type feeder
    • 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
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4812—Compound movement of tool during tool cycle

Definitions

  • web cutting apparatus comprising a rotary drum having a substantially radially inwardly extending shaped slot in its periphery, drive means for driving said drum, a cutter arm, cam means which is adapted to control the movement of said cutter arm and which is connected to be driven by said drive means, the control of the cam means and the shape of the cutter arm being such that in operation the cutter arm will cut through a web on said drum at said slot and will descend, together with the leading edge of the trailing portion of the cut web, into said slot and remain in the said slot for a predetermined period.
  • the control of the cam means is preferably such that, while in said slot, the cutter arm continues its descent to overrun the said leading edge, and thereafter, at a predetermined period, rises from said slot and guides the said leading edge into a position in which the latter is aligned with a dispensing aperture.
  • control of the cam means may be advantageously such that after the cutter arm has risen out of said slot, it is lifted so as to be well clear of the drum over an angle which is a function of the angle subtended by the normals drawn to the respective tangents of the web run-on and run-off positions on the drum.
  • the cam means preferably includes a stationary cam track, and a cam follower mounted on a lever attached to a shaft mounted through the drum for rotation therewith, there being a bevel gear connection between the mounting of the cam follower and the cutter arm.
  • the drum may have associated therewith cam-driven control means for positioning the web on the drum and for engaging the lateral edges of the web after the cutter arm has cut through the web.
  • the drum has preferably at least one set of peripheral teeth for co-operating with perforations in said web.
  • FIG. 1 is a longitudinal sectional view of the web cutting apparatus according to the present invention
  • FIG. 2 is a section taken along the line B-B of FIG. 1 and illustrating the stationary cam track
  • FIG. 3 is a section taken along the line E-E of FIG. 1,
  • FIG. 4 is a fragmentary perspective view of the cutter arm of the apparatus shown in FIG. 1, but on an enlarged scale, and
  • FIG. 5 is a view in half section of the cam-driven control means associated with the apparatus of FIG. 1 for positioning the web on the apparatus according to the present invention.
  • a web cutting apparatus which includes a central drive shaft 11 adapted to be connected and driven by a prime mover (not shown).
  • the web cutting apparatus 10 may form part of a larger apparatus (not shown) such as an auto-spooling machine which may include a stock of film which is continuously fed to a drum associated with cutting means, to be described below, for cutting the film into predetermined lengths while it is running, an indexing mechanism, a tape sticking mechanism associated with the indexing mechanism for feeding adhesive tape to a tape measuring drum, a tape cutter for periodically severing a predetermined length of tape ofi the tape on the drum and thereafter sticking that predetermined length of tape onto the trailing edge of a length of severed film so as to secure said film to a backing web, and thereafter feeding the film and the backing web to a spooling or winding mechanism and a spool-ejecting mechanism.
  • a larger apparatus such as an auto-spooling machine which may include a stock of film which is continuously fed to a drum associated with cutting means, to be described below, for cutting the film into predetermined lengths while it is running, an indexing mechanism, a tape sticking mechanism associated with the indexing mechanism
  • FIG. 1 shows a gear arrangement generally indicated at 12 for transmitting drive from the drive shaft 11 to at least some of the above-mentioned other parts of the larger apparatus.
  • the shah 11 is joumalled in a pair of spaced apart ball bearings 14 and 15 the outer races of which are connected to stationary support structure 16.
  • the support structure 16 has at its front end (i.e. the right-hand end as viewed in FIG. 1) an integral peripheralflange 17 to which issecured a stationary cam (the knife cam) 18 having a cam track 19 therein.
  • a stationary cam the knife cam
  • FIG. 2 One purely exemplary embodiment of the shape of the cam track 19 is shown in FIG. 2.
  • a drum 21 Keyed to the front end of the shaft 11 is a drum 21 having a set of angularly spaced apart peripheral teeth 22.
  • the web or film to be cut is fed by means not shown from a stock onto the drum 21 so that the perforations in the film engage over the teeth 22 on the drum 21 whereby accurately to position the web on the drum 21.
  • another cam 50 web positioning cam
  • FIG. 5 This is shown in greater detail in FIG. 5.
  • the drum 21 is provided with a radially extending slot 25 of substantially rectangular cross-section.
  • An arrow 26 indicates in FIG. 3 the direction of rotation of thedrum 21.
  • the slot 25 is formed with a rounded trailing edge 27 and with a substantially straight leading edge 28.
  • a stationary cutter element 29 is secured to the radially extending trailing face of the slot 25 and such that the operative edge of the stationary cutter 29 coincides with the longitudinal center line 30 of the slot 25.
  • a cutter arm generally indicated at 35, the actual shape of which can be seen better and on an enlarged scale on FIG. 4.
  • a bevel gear wheel 37 Secured to the base of the cutter arm 35 is a bevel gear wheel 37 which has, preferably, spiral teeth.
  • the bevel gear 37 is in meshing engagement with another bevel gear 38 of spiral teeth and mounted fixedly at the front end of a shaft 39 on the rear end of which is mounted a cam follower generally indicated at 40 which engages in the cam track 19.
  • the cutter arm 35 has at its free end a front or cutting edge 42 adapted to cut the web by co-operation with the stationary cutting element 29, and an enlargement 43 at its trailing edge.
  • FIG. 5 there is shown a fragmentary half sectional view of another stationary cam plate 50 having therein a cam track 51 in which is engaged a cam follower generally-indicated at 52.
  • the cam follower 52 is adapted to be driven by the drum 21, the connection being shown at 53.
  • From the connection 53 a respective pair of pivoted link arms 54, 55 extend to the two axial end faces of the drum 21, and the respective free ends of the pivoted link arms 54, 55 terminate in respective reciprocable fingers 56.
  • the fingers 56 are adapted to engage the lateral edges of the severed film 60 on the surface of the drum 21 by extending between a pair of adjacent teeth 22, so as to control the position of the film 60 on the drum 21.
  • the knife cam 18, the cam track 19 and the knife 35 are also indicated.
  • the operation of the web cutting apparatus is as follows.
  • perforated film is fed onto the drum 21 so that the perforations in the film engage over the teeth 22.
  • Shaft 11 causes the drum 21 to rotate, and this drive is transmitted also to the cutter arm 35 through the cam track 19 and the cam follower 40.
  • the shape of the cam track 19 is such that at the beginning of each cycle of operation the cutter arm 35 extends radially and well clear of the drum 21 and will move inwardly towards the drum 21.
  • the cutter arm 35 will engage the web and cut through it, and at this predetermined location the slot 25 in the drum 21 will be exactly opposite the cutter arm 35.
  • the cam and follower arrangement 50, 51 and 52 is such that that moment the fingers 56 engage the lateral edge of the severed film 60.
  • the cutter arm 35 will descend into the slot 25 and in doing so its enlarged trailing end 43 will engage the leading edge of the film on the drum to press that leading edge against the rounded edge 27 of the slot 25 to prevent it from interfering with a subsequent operation.
  • the cutter arm 35 in the slot 25 overruns the leading edge of the severed film 60, and after a predetermined period begins its return stroke and rises out of the slot.
  • the illustrated embodiment of the present invention provides a relatively simple web cutting apparatus capable of cutting off predetermined lengths from a continuous web while the latter is moving and in which the cutter arm performs the double function of cutting the web and thereafter controlling it so as to prevent it from interfering with previously cut lengths and then to guide it into a desired predetermined direction.
  • Web cutting apparatus comprising a rotary drum having a substantially radially inwardly extending shaped slot in its periphery, drive means for driving said drum, a cutter arm, cam means adapted to control the movements of said cutter arm and drivably connected to said drive means, the control of the cam means and the shape of the cutter arm being such that in operation the cutter arm cuts through a web on said drum at said slot and descends, together with the leading edge of the trailing portion of the cut web, into said slot and continues its descent to overrun the said leading edge, and thereafter, at a predetennined period, rises from said slot and guides the said leading edge into a position in which the latter is aligned with a dispensing aperture.
  • cam means includes a stationary cam track, and a cam follower mounted on a lever attached to a shaft mounted through the drum for rotation therewith, there being a bevel gear connection between the mounting of the cam follower and the cutter arm.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Replacement Of Web Rolls (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US36595A 1969-05-13 1970-05-12 Web-cutting apparatus Expired - Lifetime US3668962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24298/69A GB1262753A (en) 1969-05-13 1969-05-13 Web-cutting apparatus

Publications (1)

Publication Number Publication Date
US3668962A true US3668962A (en) 1972-06-13

Family

ID=10209482

Family Applications (1)

Application Number Title Priority Date Filing Date
US36595A Expired - Lifetime US3668962A (en) 1969-05-13 1970-05-12 Web-cutting apparatus

Country Status (6)

Country Link
US (1) US3668962A (enrdf_load_stackoverflow)
AU (1) AU1476370A (enrdf_load_stackoverflow)
BE (1) BE750362A (enrdf_load_stackoverflow)
DE (1) DE2023444A1 (enrdf_load_stackoverflow)
FR (1) FR2047672A5 (enrdf_load_stackoverflow)
GB (1) GB1262753A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983578A (en) * 1974-07-01 1976-09-28 International Business Machines Corporation Ticket information recording and web parting mechanism
US3995519A (en) * 1970-10-20 1976-12-07 Molins Limited Rod-making machines
US4188844A (en) * 1977-10-14 1980-02-19 Georgia-Pacific Corporation Dispenser for rolls of flexible sheet material and cutter mechanism for use therein
US5937718A (en) * 1994-08-29 1999-08-17 Granger; Maurice Folded/unfolded paper towel dispensing apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US13486A (en) * 1855-08-28 Improvement in preparations of wool-oil
US370672A (en) * 1887-09-27 bacon
US2379033A (en) * 1943-02-19 1945-06-26 United States Bedding Co Tape cutting machine
US2445843A (en) * 1945-03-28 1948-07-27 Rca Corp Film marker
US3069952A (en) * 1957-09-20 1962-12-25 Roksvaag Lars Cutting machine having rotatable pivotal shearing means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US13486A (en) * 1855-08-28 Improvement in preparations of wool-oil
US370672A (en) * 1887-09-27 bacon
US2379033A (en) * 1943-02-19 1945-06-26 United States Bedding Co Tape cutting machine
US2445843A (en) * 1945-03-28 1948-07-27 Rca Corp Film marker
US3069952A (en) * 1957-09-20 1962-12-25 Roksvaag Lars Cutting machine having rotatable pivotal shearing means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995519A (en) * 1970-10-20 1976-12-07 Molins Limited Rod-making machines
US3983578A (en) * 1974-07-01 1976-09-28 International Business Machines Corporation Ticket information recording and web parting mechanism
US4188844A (en) * 1977-10-14 1980-02-19 Georgia-Pacific Corporation Dispenser for rolls of flexible sheet material and cutter mechanism for use therein
US5937718A (en) * 1994-08-29 1999-08-17 Granger; Maurice Folded/unfolded paper towel dispensing apparatus

Also Published As

Publication number Publication date
DE2023444A1 (enrdf_load_stackoverflow) 1970-11-19
BE750362A (fr) 1970-10-16
FR2047672A5 (enrdf_load_stackoverflow) 1971-03-12
GB1262753A (en) 1972-02-09
AU1476370A (en) 1971-11-11

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