GB2065535A - Cutting device for web material - Google Patents
Cutting device for web material Download PDFInfo
- Publication number
- GB2065535A GB2065535A GB8040475A GB8040475A GB2065535A GB 2065535 A GB2065535 A GB 2065535A GB 8040475 A GB8040475 A GB 8040475A GB 8040475 A GB8040475 A GB 8040475A GB 2065535 A GB2065535 A GB 2065535A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film web
- cutting device
- film
- feeding
- air
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title description 3
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract 2
- 239000010408 film Substances 0.000 claims 11
- 239000010409 thin film Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- YSGQGNQWBLYHPE-CFUSNLFHSA-N (7r,8r,9s,10r,13s,14s,17s)-17-hydroxy-7,13-dimethyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1h-cyclopenta[a]phenanthren-3-one Chemical compound C1C[C@]2(C)[C@@H](O)CC[C@H]2[C@@H]2[C@H](C)CC3=CC(=O)CC[C@@H]3[C@H]21 YSGQGNQWBLYHPE-CFUSNLFHSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
- B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
- B26D1/385—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/20—Cutting beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Making Paper Articles (AREA)
Abstract
A device for cutting in succession single lengths from a continuous film web Z, comprises a movable blade D arranged transversely with respect to the direction of feeding of the film web, a fixed counterblade E, intended to co-operate with the movable blade, and a pair of co-operating feeding rollers R1, R2, arranged upstream of the said blade and counterblade. At an intermediate point between the feeding rollers and the blade and counterblade, there is arranged, below the undersurface of the film, a transverse row of air blowing nozzles 1 directed in the feeding direction of the film and inclined with respect to the plane of the running film web. <IMAGE>
Description
SPECIFICATION
A cutting device for film web
SUMMARY OF THE INVENTION
The present invention relates to a cutting device for cutting in succession single lengths or sections from a continuous web, particularly a film web of plastic material, for use in connection with wrapping machines. The device according to the invention is of the type in which a pair of cooperating feeding rollers draw the film web from a suitable supply, such as a bobbin, and feed it, by pushing, to a cutting unit which is located downstream of the said feeding rollers and comprises a movable blade which cooperates with a fixed counter blade. In this type of cutting device, usually the film web (which is not sufficiently rigid and self-sustaining) is guided from the feeding rollers to the cutting blades, by being passed through guide plates.However, in the case of film which are very thin, and/or made of particular plastic material, there is the tendency of the film to stick onto the surfaces of the guide plate, also due to the fact that the film may result charged with static electricity.
The above mentioned inconvenience is eliminated, in the cutting device according to the invention by providing, at a point between the feeding rollers and the cutting blades, a series of transversely aligned air blowing nozzles inclined with respect to the plane of the running film web, and directed in the feeding direction of the film web. In this manner, the film web is sustained by the air jets, which form a moving air layer, and push the film towards the cutting blades, while keeping it well stretched and tensioned, and avoiding its sticking on the surfaces of the guides.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other features and advantages of the present invention will result from the following description of one preferred embodiment thereof, made with reference to the attached drawings, in which:
Figure 1 is a side view, with parts in section, of the cutting device according to the invention.
Figure 2 is a front elevation view of a platelike guide member, incorporating the air blowing nozzles, used in the cutting device according to the invention.
Figure 3 is a top plan view of the plate-like guide member of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODI
MENT
With reference to Fig. 1, the cutting device comprises a pair of cooperating feeding rollers
R1, R2 preferably constructed as grooved rollers operatively connected to each other, for example by a gear train (not shown), so as to be rotated upon command either continuously or intermittently as indicated by the arrows
F1. The film Z is passed between the rollers
R1, R2 and is drawn and pushed by them in the direction of the arrow F2, while being guided by an upper plate-like guide member G1 and by lower plate-like guide members G2 (see also Figs. 2 and 3) and G3.The film Z, coming out of the passage defined by guide members G1 and G2, is passed through the longitudinal slot opening A of a rotary oscillating or swinging blade unit B which is swingable about its rotational axis C, said axis C being parallel to the axis of rollers R1 and R2.
The swinging blade unit B can be caused to swing alternately of limited and predetermined angular amounts around the axis C as indicated by the arrows F3. The swinging blade unit B carries a blade D which is mounted thereon in an adjustable manner and which, upon downward swinging of the said B, cooperates with a fixed counterblade E located at a level below the path of the moving film Z, in such a manner that the film Z is cut transversely. If the film Z is very thin, and/or charged with static electricity, the length thereof comprised between the rollers R1, R2 and the counterblade E will present the tendency to stick to the guide members G1 and
G2 and to the guide surfaces of the swinging blade unit B, and consequently it will not be advanced, or it will be advanced improperly by the pushing action of the rollers R1 and
R2.
According to the invention, the section or length of film between the feeding rollers R1,
R2 and the counterblade E is submitted to the action of air jets at a suitable pressure, which jets push against the undersurface of the said section of film and are directed so as to keep the film in a well-stretched condition while causing to advance same in cooperation with the feeding rollers R1, R2.For this purpose, the lower guide member G2 (see also Figs. 2 and 3) is provided with a suitable number of bores or nozzles 1, the longitudinal axes of which are parallel to each other and lie on a plane which intersects the plane of the film Z along a line which transversal to the feeding direction of the film, and which forms with the said plane of the film, downstream with respect to the line of intersection, an angle comprised between 130 and 160 and preferably of 150 . Said bores 1 communicate, at their bottom, with a conduit 3 which is welded or anyhow secured to the underside of guide G2; said conduit 3 is closed at one end and is provided at the other end with an adapter for connection to a source of compressed air (not shown).The air jets blowing out from bores 1 will skim longitudinally along the undersurface of ihe length of film advanced towards the cutting blades, keep it well stretched and exert thereagainst an evenly-distributed pushing action which ensures the correct advancement of the film, downstream of the feeding rollers R1, R2, in the direction of arrow Fl, even in the case that the film is very thin and charged with static electricity. It is to be noted that the provision of the nozzles 1 presenting their discharge ends on the surface of the plate-like guide member G2 will ensure the formation of a suitable moving air layer between the undersurface of the film and the said guide member
G2.For this reason, in order to obtain the maximum extension of the said moving air layer, the nozzles 1 are preferably arranged so as to act against the initial or intermediate portion of the film length downstream of the feeding rollers R1, R2.
It is apparent that many modifications can be brought to the above described device, without departing from the limits of the invention. For example, the conduit 3, rather than being secured to the undersurface of the guide member G2, can be directly formed at the interior of the said guide member. Also, the nozzles 1 can be arranged with their longitudinal axis which slightly diverge in the feeding direction of the film, in a fan-like arrangement, in such a manner that the film is also subjected to stretching components transversely directed. Moreover, the air blowing nozzles 1 could be arranged above the film Z so as to act on its overside, alone or in combination with the nozzles arranged below the film, as above described.
Claims (9)
1. A device for cutting in succession single lengths or sections from a continuous web, particularly a very thin film web adapted to be used in wrapping machines, comprising a movable blade (D) arranged transversely with respect to the direction of feeding of the film web, a fixed counterblade (E) intended to cooperate with the said movable blade, and a
pair of cooperating feeding rollers (R1, R2) arranged upstream of the said blade and counterblade, with respect to the feeding direction of the film web, characterized by the fact that a point between the said feeding rollers (R1, R2) and the said blade and counterblade (D, E), there is provided, on at least one side of the film web, at least one airblowing nozzle (1) directed in the feeding direction (F2) of the film web and inclined with respect to the plane of the running film web.
2. A cutting device according to claim 1,
in which a plurality of air-blowing nozzles (1)
are provided along the width of the film web.
3. A cutting device according to claim 2,
in which the air-blowing nozzles (1) are ar
ranged with their longitudinal axis parallel to
each other and with their discharge ends on a
line transversal to the feeding direction of the film web.
4. A cutting device according to claim 2,
in which the air-blowing nozzles (1) are arranged with their longitudinal axis diverging in the feeding direction of the film web.
5. A cutting device according to claim 1, in which the longitudinal axis of each airblowing nozzle (1) is inclined with respect to the downstream running portion of the film web, of an angle of incidence comprised between 130" and 160'.
6. A cutting device according to claim 5, in which the angle of incidence is of 150 .
7. A cutting device according to claim 1, in which the air-blowing nozzles (1) are arranged on the underside of the film web.
8. A cutting device according to claim 1, in which the air-blowing nozzles are provided on plate-like guide members (G2) for the film web.
9. A cutting device constructed and arranged substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT12872/79A IT1124409B (en) | 1979-12-21 | 1979-12-21 | DEVICE TO FEED FILM EVEN VERY THIN AT THE WRAPPING STATION OF THE PACKAGING MACHINES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2065535A true GB2065535A (en) | 1981-07-01 |
| GB2065535B GB2065535B (en) | 1983-03-02 |
Family
ID=11143632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8040475A Expired GB2065535B (en) | 1979-12-21 | 1980-12-18 | Cutting device for web material |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS56102498A (en) |
| BR (1) | BR8008334A (en) |
| CH (1) | CH647974A5 (en) |
| DD (1) | DD155510A5 (en) |
| DE (1) | DE3047408A1 (en) |
| FR (1) | FR2473026A1 (en) |
| GB (1) | GB2065535B (en) |
| IT (1) | IT1124409B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4447280A (en) * | 1981-10-22 | 1984-05-08 | Malthouse Martin D | Labelling machine |
| US4561928A (en) * | 1980-10-24 | 1985-12-31 | Malthouse Martin D | Labelling machine |
| CN110371761A (en) * | 2019-07-19 | 2019-10-25 | Tcl王牌电器(惠州)有限公司 | Automatic adhesive tape labelling machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3148935C2 (en) * | 1981-12-10 | 1984-11-08 | Lindauer Dornier Gmbh, 8990 Lindau | Device for cross-cutting a material web moving in the longitudinal direction |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR627682A (en) * | 1926-01-22 | 1927-10-10 | Improvements to mechanisms used to cut a moving strip into sections or sheets | |
| DE944919C (en) * | 1953-01-17 | 1956-06-28 | Jagenberg Werke Ag | Cross cutter for cutting running material, in particular paper webs by means of rotating knife rollers |
| FR1398724A (en) * | 1962-11-27 | 1965-05-14 | Svenska Flaektfabriken Ab | Method for stabilizing movement of air-supported web material and apparatus for applying the method |
-
1979
- 1979-12-21 IT IT12872/79A patent/IT1124409B/en active
-
1980
- 1980-12-04 CH CH8976/80A patent/CH647974A5/en not_active IP Right Cessation
- 1980-12-17 DE DE19803047408 patent/DE3047408A1/en not_active Withdrawn
- 1980-12-18 GB GB8040475A patent/GB2065535B/en not_active Expired
- 1980-12-19 DD DD80226368A patent/DD155510A5/en unknown
- 1980-12-19 BR BR8008334A patent/BR8008334A/en unknown
- 1980-12-19 FR FR8027401A patent/FR2473026A1/en active Pending
- 1980-12-22 JP JP18059180A patent/JPS56102498A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4561928A (en) * | 1980-10-24 | 1985-12-31 | Malthouse Martin D | Labelling machine |
| US4447280A (en) * | 1981-10-22 | 1984-05-08 | Malthouse Martin D | Labelling machine |
| CN110371761A (en) * | 2019-07-19 | 2019-10-25 | Tcl王牌电器(惠州)有限公司 | Automatic adhesive tape labelling machine |
| CN110371761B (en) * | 2019-07-19 | 2022-04-22 | Tcl王牌电器(惠州)有限公司 | Automatic adhesive tape sticking machine |
Also Published As
| Publication number | Publication date |
|---|---|
| IT7912872A0 (en) | 1979-12-21 |
| IT1124409B (en) | 1986-05-07 |
| BR8008334A (en) | 1981-07-07 |
| DD155510A5 (en) | 1982-06-16 |
| JPS56102498A (en) | 1981-08-15 |
| DE3047408A1 (en) | 1981-08-27 |
| GB2065535B (en) | 1983-03-02 |
| FR2473026A1 (en) | 1981-07-10 |
| CH647974A5 (en) | 1985-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |