US3218218A - Sealing and severing device for packaging machines - Google Patents
Sealing and severing device for packaging machines Download PDFInfo
- Publication number
- US3218218A US3218218A US221975A US22197562A US3218218A US 3218218 A US3218218 A US 3218218A US 221975 A US221975 A US 221975A US 22197562 A US22197562 A US 22197562A US 3218218 A US3218218 A US 3218218A
- Authority
- US
- United States
- Prior art keywords
- sealing
- rolls
- members
- roll
- severing
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
- B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
- B65B61/08—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting using rotary cutters
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- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
- Y10T156/1378—Cutter actuated by or secured to bonding element
Definitions
- This invention relates to a device in packaging machines for effecting sealing and simultaneous severing of packages transversally to the feeding direction of the packages by means of two rotating rolls resiliently pressed against each other and against opposite sides of the package sheet material and having envelope surfaces designed to form narrow, mutually co-operating sealing zones parallel to the axes of the rolls, one of two co-operating zones being provided with a knife and the other with a striking bar having a counter surface perpendicular to the knife, both members extending all along the length of the zones.
- packaging machines of similar types having two sealing jaws which are movable into engagement with opposite sides of the package material as well as along the feeding direction of the packages are often provided with a knife which is slidably fitted in a slot in one of the jaws which knife when severing the package material is arranged to enter a slot in the other jaw aligned with the slot in the first jaw.
- the sealing performed by means of such a sealing and severing device is not entirely satisfactory because no sealing at all is obtained near the line of cutting where the slots are located.
- the object of the invention is, therefore, the provision of a package machine in which said inconveniences are avoided in a simple and satisfactory manner.
- a sealing and severing device for packing machines for effecting sealing and simultaneously therewith severing of packages transversally to the feeding direction of the packages by means of two rotating rolls resiliently pressed against each other and against opposite sides of the package sheet material and having envelope surfaces designed to form narrow, mutually co-operating sealing zones parallel to the axes of the rolls, one of two co-operating zones being provided with a knife and the other with a striking bar having a counter surface perpendicular to the knife both members extending all along the length of the zones, characterized in that the knives and/or the striking bars are slidably fitted in radial slots in the rolls and are provided with end portions protruding from the end walls of the rolls which end portions at the severing moment move into engagement with and are pressed radially outwards by means of two cam surfaces which are journaled in the frame movable in the direction perpendicular to the tangential plane of the rolls against the urge of resilient members.
- the rolls are operated independent of the knife and the striking bar and it is possible to adjust the contact pressure of the rolls to a value which is suitable for ob- Patented Nov. 16, 1965 taining a fully satisfactory seal.
- a suitably adapted force is supplied to the knife and the striking bar by means of the cam surfaces without influencing the contact pressure of the rolls.
- a sealing and severing device it is possible to obtain an improved severing and a reduction of the force necessary for the severing in a very simple manner, as will be apparent in the following, by imparting to the knife and the striking bar, respectively, a tilting motion at severing in which case the edge of the knife and the striking bar are suitably formed slightly crooked, so that these members touch each other in a point of tangency which due to the tilting is displaced along the line of severing.
- FIGURE 1 shows the rolls in longitudinal section and arms located outside the end walls of the rolls supportingthe rolls and the cam surfaces
- FIGURE 2 shows a view of one of the end portions of the rolls, which is equal to the other end portion.
- the rolls 1 and 2 are in this embodiment arranged one above the other.
- the lower one 1 is rotatably journaled directly in the frame 3 by means of two arms 4 which are fixedly mounted in the frame on both sides of the roll and on which the shaft pivots 5 of the roll are journaled.
- the shaft pivots 6 of the upper roll 2 are rotatably journaled on two lever arms 7 located on both sides of the roll, which arms are pivoted on the frame 3 by means of the shaft 8.
- two further arms 9 are pivoted on both sides of the roll 2, each of which arms supports a roller 11 rotatably journaled on the shaft 10.
- the rolls are provided with envelope surfaces, which form mutually co-acting sealing zones 12, 13 and 14, 15, and along the middle lines of the zones the rolls are provided with radial slots 16, 17, 18, 19 which extend straight across the width of the rolls.
- striking bars 20 are fixedly mounted and in the slots 17 and 19 knives 21 are slidably fitted having end portions protruding from the end walls of the roll 2.
- the free ends of the arms 6 and 9 are resiliently attached to the arms 4 by means of rods 22 and 23 and compression springs 24 and 25 the pressure of which is adjustable by means of nuts 26 and 27.
- a series of the units to be packaged 28 placed in spaced-apart relationship and enveloped by a flexible, sealable sheet wrapper material is advanced between the rolls 1 and 2 in synchronism with the rotation of the rolls and with the edge portions of the sheet material pressed between the cylindrical end portions of the rolls.
- the radius of the rolls 1 and 2 and the number of sealing zones are so adapted that seals are obtained intermediate the individually packaged units.
- the striking bars 20 are countersunk somewhat below the surface of the sealing zones which facilitates the cutting operation in that the package sheet material when moved downward towards the striking bar 20 by the knife 21 and clamped along the edges of the slots 16, 18 becomes subjected to tension simultaneously with the cutting.
- the knives 3 or the striking bars are suitably formed slightly crooked in this case so that a knife and a striking bar touch each other in a contact point which due to the tilting of the knife continuously is displaced across the seal.
- the arms 9 may be provided with fixedly mounted cam surfaces instead of rollers 11.
- the roll 1 and the striking bars 20 may be resiliently journaled in the same manner as the roll 2 and the knives 21.
- the rolls may be arranged to make a reciprocating motion of turning eventually in combination with bringing the rolls apart during the backward motion of the rolls.
- a sealing and severing device for a wrapper with spaced contents therein comprising a frame, two uniformly rotating rolls in said frame between which said wrapper is fed, a spring yielding bearing arrangement for said rolls, a sealing member on each roll having a radially extending slot therein dividing said members into each two spaced sealing zones extending parallel to the longitudinal axis of each roll, a knife blade slidingly mounted in said slot of one of said members, a striking bar mounted in the other of said members, said knife blade and striking bar severing said wrapper between the seals made by said zones between said spaced contents, said knife blade having the ends thereof protruding from the end Walls of its roll, means mounted in said frame in resilient bearing members cooperating with said ends for operating said knife blade for displacing it radially outwards in said slot.
- a sealing and severing device for a wrapper with spaced contents therein comprising a frame, two uniformly rotating rolls in said frame between which said wrapper is fed, a spring yielding bearing arrangement for said rolls, a sealing member on each roll having a radially extending slot therein dividing said members into each two spaced sealing zones extending parallel to the longitudinal axis of each roll, a knife blade mounted in said slot of one of said members, a striking bar slidingly mounted in said slot of the other of said members, said knife blade and striking bar severing said wrapper between the seals made by said zones between said spaced contents, said striking bar having the ends thereof protruding from the end walls of its roll, means mounted in said frame in resilient bearing members cooperating with said ends for operating said striking bar for displacing it radially outwards in said slot.
- a sealing and severing device for a Wrapper with spaced contents therein comprising a frame, two uniformly rotating rolls in said frame between which said wrapper is fed, a spring yielding bearing arrangement for said rolls, a sealing member on each roll having a radially extending slot therein dividing said members into each two spaced sealing zones extending parallel to the longitudinal axis of each roll, a knife blade slidingly mounted in said slot of one of said members, a striking bar slidingly mounted in said slot of the other of said members, said knife blade and striking bar severing said Wrapper between he seals made by said zones between said spaced contents, said knife blade and striking bar having the ends thereof protruding from the end walls of said rolls, means mounted in said frame in resilient bearing members cooperating with said ends for operating said knife blade and striking bar for displacing them radially outwards in said slots.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Package Closures (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE901561 | 1961-09-11 | ||
SE1220780X | 1961-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3218218A true US3218218A (en) | 1965-11-16 |
Family
ID=32829151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US221975A Expired - Lifetime US3218218A (en) | 1961-09-11 | 1962-09-07 | Sealing and severing device for packaging machines |
Country Status (3)
Country | Link |
---|---|
US (1) | US3218218A (xx) |
DE (1) | DE1220780B (xx) |
NL (1) | NL122944C (xx) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3415704A (en) * | 1964-08-14 | 1968-12-10 | Rotostar S P A | Heat sealing of plastics film |
US3950205A (en) * | 1971-10-04 | 1976-04-13 | Union Carbide Corporation | Rotary heat sealer |
US4019949A (en) * | 1974-03-12 | 1977-04-26 | The Thames Sack And Bag Company Limited | Heat sealing apparatus |
US4409062A (en) * | 1980-12-10 | 1983-10-11 | Conti P | Rotary binder |
EP0673836A1 (de) * | 1994-03-24 | 1995-09-27 | Record S.P.A. | Vorrichtung zum Schweissen und Schneiden von Filmverpackungen |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943686A (en) * | 1974-09-05 | 1976-03-16 | Fmc Corporation | Wrapping machine with severing blade in crimping head |
DE2928847C2 (de) * | 1979-07-06 | 1984-03-22 | Tetra Pak International AB, 22101 Lund | Vorrichtung zum Bearbeiten eines Schlauches aus Verpackungsmaterial |
DE102004029430A1 (de) * | 2004-06-18 | 2006-01-05 | Rovema Verpackungsmaschinen Gmbh | Vorrichtung zum Verschweißen und Durchtrennen eines Folienschlauches |
DE102004041058A1 (de) * | 2004-08-25 | 2006-03-02 | Rovema Verpackungsmaschinen Gmbh | Vertikale Schlauchbeutelmaschine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2803100A (en) * | 1956-05-07 | 1957-08-20 | Swift & Co | Packaging meats, vacuum |
US2889671A (en) * | 1953-02-05 | 1959-06-09 | Modern Coffees Inc | Method and apparatus of making and filling coffee bags |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE455263C (de) * | 1925-08-11 | 1928-01-30 | Automat Molding And Folding Co | Vorrichtung zum stetigen Zufuehren der Papierbahn und Abtrennen der einzelnen Papierlaengen, insbesondere an Einwickelmaschinen |
-
0
- NL NL122944D patent/NL122944C/xx active
-
1962
- 1962-08-22 DE DEK47569A patent/DE1220780B/de active Pending
- 1962-09-07 US US221975A patent/US3218218A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2889671A (en) * | 1953-02-05 | 1959-06-09 | Modern Coffees Inc | Method and apparatus of making and filling coffee bags |
US2803100A (en) * | 1956-05-07 | 1957-08-20 | Swift & Co | Packaging meats, vacuum |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3415704A (en) * | 1964-08-14 | 1968-12-10 | Rotostar S P A | Heat sealing of plastics film |
US3950205A (en) * | 1971-10-04 | 1976-04-13 | Union Carbide Corporation | Rotary heat sealer |
US4019949A (en) * | 1974-03-12 | 1977-04-26 | The Thames Sack And Bag Company Limited | Heat sealing apparatus |
US4409062A (en) * | 1980-12-10 | 1983-10-11 | Conti P | Rotary binder |
EP0673836A1 (de) * | 1994-03-24 | 1995-09-27 | Record S.P.A. | Vorrichtung zum Schweissen und Schneiden von Filmverpackungen |
Also Published As
Publication number | Publication date |
---|---|
DE1220780B (de) | 1966-07-07 |
NL122944C (xx) |
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