GB2207628A - A machine for sealing and cutting plastic bag material into plastic bags - Google Patents
A machine for sealing and cutting plastic bag material into plastic bags Download PDFInfo
- Publication number
- GB2207628A GB2207628A GB08718450A GB8718450A GB2207628A GB 2207628 A GB2207628 A GB 2207628A GB 08718450 A GB08718450 A GB 08718450A GB 8718450 A GB8718450 A GB 8718450A GB 2207628 A GB2207628 A GB 2207628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutting
- sets
- plastic bags
- signal
- sealing
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
-
- 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
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
- B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
- B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/006—Controlling; Regulating; Measuring; Safety measures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
The machine comprises a motor 1 driving a shaft 13 actuating a knife 15 via eccentric(s) 16 and a feed roller 32 via a clutch 25 and brake 26. Sensors 52, 19 and 8 respectively signal the extent of feed of the rollers 32, 33, the angular position of the shaft 13 and the picking up of a registration mark 91 on the bag material to a control unit 21, also supplied with data relating to bag size, which controls the clutch and brake for actuating and stopping the roller feed for a cutting stroke to take place. The machine may comprise an additional roller feed (41, 42, Fig. 4) with independent sensing to allow the knife to cut simultaneously two bags of different lengths from side-by-side webs of bag material. <IMAGE>
Description
A New Sealing and Cutting Machine For Plastic Bag
This invention provides a sealing and cutting machine for plastic bag.
The current sealing and cutting machine for plastic bag usually has a rotating wheel to actuate a connecting rod that is coupled with a sector gear to provide a reciprocating motion. The roller in the machine wil make a stepping motion so as to drive the plastic bag to move a given pitch forwards at a time; then, a thermal knife will move downwards to cut plastic bag into agiven length desired. According to the inventor's experiences for years in machine-manufacturing, the reciprocatin motion is deemed the least economical way of motion because of wasting more work during the return stroke; further, the reciprocating motion method would cause more wear-andtear loss to the parts of a machine.In view of the aforesaid facts, the inventor has, through repeated studies, developed a machine, which can provide a circular motion, and which includes an encoder for picking up the pitch of the roller, a color detector for picking up the work on the plastic bag, and a control unit for controlling an electro-magnetic braker and an electro-magnetic clutch. The machine according to the present invention can provide a precise cutting size and elevate the manufacturing efficiency of plastic bags.
The feature of the present invention is that the machine can automatically control the electro-magnetiic brake and the electro-magnetic clutch to operate or to stop by means of an encoder and a color detector to control the control unit so as to cut the belt-shaped plastic material into a bnag with a uniform size.
The present invention is further described in detail with reference to accompanying drawings as follows: FIG.1 is a perspective view of the embodiment-I of the
present invention.
FIG.2 is a circuit block diagram of the embodiment-I
of the present invention.
FIG.3 illustrates the wave forms in the block diagram
of the embodiment-I of the present invention.
FIG.4 is a perspective view of the embodiment-II according
to the present invention.
FIG.5 is a block diagram of the embodiment-II of the
present invention.
FIG.6 illustrates the wave forms in the block diagram
of the embodiment-II of the present invention.
In FIG.1, the shaft of the motor 1 is mounted with a small pulley 10, which is coupled to a large pulley 12 through a belt 11; therefore, the large tooth-belt wheel 14 on the same transmission shaft 13 as that of the large pulley 12 will rotate. The transmission shaft 13 is mounting with two eccentric wheel 16 to operate the sealing and cutting knife 15 upon the transmission shaft 13 rotating the sealing and cutting knife 15 moves vertically because of the both ends of the knife 15 being fitted into the channel frames respectively. The transmission shaft 13 is also mounted with a photo interrupter assembly, which comprises a signal disk 18 having a 90 ; cut portion, and a photo interrupter 19. The signal sensed with the signal disk 18 is to be coupled, through the wires 20, to the control unit 21.Since the large tooth4élt wheel 14 on the transmission shaft is coupled, via a tooth-belt 22, to a small tooth-belt wheel 23, the power is also transmitted to a transmission shaft.
24. The transmission shaft is controlled through an electro-magnetic clutch 25 and an electro-magnetic brake 26, by the control unit 21 to drive a tooth-belt wheel 28 mounted at one end of a transmission shaft 27; the wheel 28 is further coupled to a tooth-belt wheel 30 via a tooth-belt 29. The wheel 30 is fixedly mounted on the roller shaft 31. The roller is furnished wit a rolling elastic surface; a driven roller 33 made of the same material as that of the driving roller is driven to rotate upon the driving roller being rotated. Beside the toothbelt wheel 28, there is an encoder of the pitch sensor assembly; the encoder comprises a scale disk 51 and a pitch sensor 52. The scale disk 51 has a plurality of scale holes 53 on the edge of the disk 51. The pitch sensed by the sensor is coupled into the control unit 21.
FIG.2 includes a microprocessor circuit 61, a display circuit 62, a keyboard circuit 63, and a driving circuit 64. The pitch sensor 52 picks up the scale hole 53 signal, which is to be fed to the input terminal "a". The photo interrupter 19 can pick up a signal from the signal disk 18 to be fed to the input terminal "c".
The color dectector 80 can pick up a mark signal 91 on the plastic bag 90 to be fed to the input terminal "d".
The microprocessor 61 will set the data of the length, number of sheets in accordance with the input signal on the input terminals, and the input keyed in through the keyboard circuit 63; the output of the microprocessor is fed to the next stage via the output terminals "f" and "g". The driving circuit 64 controls the clutch 25 and the brake 26 to have the driving roller stopped upon the sealing and cutting knife 15 to cut downwards.
Upon the knife 15 being lifted up, the material (plastic bag) is fed again.
FIG.3 illustrates the embodimentII of the present invention, which can seal and cut two plastic bags simultaneously. In addition to the components as mentioned in embodimentl of the present invention, one set of clutch 34 and brake 35 is mounted at the other end of the small tooth belt wheel 23; the additional set of clutch and brake are also controlled with the control unit 21. The tooth belt wheel 37 on the other end of the transmission shaft 36 is also driven to rotate.
The tooth belt wheel 39 by means of a tooth belt 38.
The tooth belt wheel 39 is fixedly mounted on roller shaft 40. The driving rollers 32 and 41 rotate independently; the driven rollers 33 and 42 also rotate independently. The color detector 81 can pick up the mark signal 93 on the plastic bag 92. Beside the tooth belt wheel 37, there is another set of pitch sensor assembly, which includes a scale disk 54 and a pitch sensor 55. The pitch sensor 55 can pick up signal from the scale holes 56 on the scale disk 54.
FIG.4 is a block diagram of the embodiment
II of the present invention, which comprises a microprocessor 61, a display circuit 62, a keyboard circuit 63, and a driving circuit 64. The pitch sensor 52 can pick up the signal of the scale holes 53, and feed to the input terminal "a"; the photo interrupter 19 can pick up the signal of the signal disk 18, and feed to the input terminal "c"; the color detector 80 can pick up the mark signal 91 on the plastic bag 90, and feed to the input terminal "d". The microprocessor 61 can instruct the driving circuit 64 in accordance with the input signals on the input terminals "a", "c", and "d" to control the electromagnetic clutch 25 and the electromagnetic brake 26. Another pitch sensor 55 is used for picking up the scale hole 56 signal, which is to be fed to the input terminal "b". The color detector 81 can pick up the mark signal 93 on the plastic bag 92, and that mark signal is to be fed to input terminal "e".
The microprocessor 61 after receiving the input signals on the input terminals "b", "c" and "e" will generate signal to cause the driving circuit 64 to control the clutch 34 and the brake 35. As shown in FIG.6. Upon the photo interrupter 19 sensing the signal disk 18 to reach the point of 270 , the sealing and cutting knife 15 will move downwards to cut two plastic bags having different length.
Briefly, it is deemed that the present invention is a novel disclosure, which can cut a single plastic bag or two plastic bags, i.e., being novel in terms of space because of it being able to gain improvement in effectiveness.
Claims (4)
1. A new sealing and cutting machine for plastic bag
comprising:
a motor as a driving power of several transmission
shafts;
a pulley as a transmission means of driving power;
a driving roller and a driven roller for feeding
plastic bags;
a belt for coupling belt wheels;
an eccentric wheel and a sealing and cutting knife;
and said eccentric wheel driving said cutting knife
to cut at a suitable time;
a disk-shaped photo interrupter for controlling
the cutting time of the cutting knife;
a pitch sensor to control the cutting operation
at a given distance;
a color detector for detecting the printing on
the plastic bag so as to control the precise cutting
distance;
a clutch and a brake for suitably controlling the
plastic bags to feed and to stop; and
a control unit which includes a micro-processor,
a display means, a keyboard for input data, a driving
clutch and a brake-driving means; and characterized
in that said machine is an improvement of the conven
tional reciprocating motion type of sealing and
cutting machine for plastic bags so as to improve
the mechanical efficiency and to provide a precise
cutting control; and in said new machine structure,
the motor driving power is transmitted via a belt,
to an eccentric wheel to drive a sealing and cutting
knife; and a tooth-belt wheel being also driven
to drive a next tooth-belt wheel via a tooth belt,
and a brake, the driving roller and the driven
can move the plastic bags forwards; and said pitch
sensor detecting a pitch signal, which and a disk
shaped knife signal are together coupled into said
control unit so as to drive said clutch and said
brake in the cutting operation; and a color detector
can detect the printings on the plastic bag to
generate a signal so as to mak a precise cutting
using said clutch and said brake in a specific
synchronous steps.
2. A new sealing and cutting machine for plastic bag
comprising:
a motor as a driving power of several transmission
shafts;
a pulley as a transmission means of driving power;
two sets of plastic bags respectively;
a belt for coupling belt wheels;
an eccentric wheel and a sealing and cutting knife;
and said eccentric wheel driving said cutting knife
to cut at a suitable time;
a disk-shaped photo interrupter for controlling
the cutting time of said cutting knife;
two sets of pitch sensors to control two sets of
plastic bags to be out at a given distance respec timely two sets of color detectors for detecting two sets
of plastic bags so as to control the precise cutting
distance respectively;
two sets of clutches and brakes for suitably control
ling two sets of plastic bags to feed and to stop
respectively; and
a control unit, which includes a micro-processor,
a display means, a keyboard for input data, and
two sets of driving means for said clutches and
said brakes; and characterized in that said machine
is an improvement of the conventional reciprocating
motion type of sealing and cutting machine for
plastic bags so as to improve the mechanical effi
ciency and to provide a precise cutting control;
and said machine has two sets of separated trans mission means and two sets of clutches and brakes
for controlling two sets of plastic bags te feed
and to stop respectively and simultaneously
so as to increase the productivity; and in said
new machine structure, the motor driving power is
transmitted, via a belt, to an eccentric wheel to
drive a sealing and cutting knife; and a tooth
belt wheel being also driven to drive a next tooth
belt wheel via a tooth-belt for driving a rotary
shaft, which drives two sets of separated driving
rollers and driven rollers; and said two sets of
rollers being controlled by a clutch and a brake
respectively so as to feed the plastic bags; and
two sets of pitch sensors can detect the pitch signals
set for controlling said two sets of plastic bags
to feed or to stop; and a disk-shaped cutting knife
signal is coupled into said control unit so as to
drive said clutch and said brake in the cutting
operation; and two color detectors can detect the
printings on the plastic bags to generate a signal
so as to make a precise cutting by using said clutches
and said brakes in a specific synchronous steps
respectively.
3. A cutting machine as claimed in claim 1 or 2, wherein
the signal disk is a round disk having i there
of cut off; and the signals generated by said signal
disk and said photo interrupter being coupled into
said control unit together; and the eccentric wheel?
on the same shaft as said signal disk can drive
said sealing and cutting knife to conduct vertical
cutting operation.
4. A cutting machine as claimed in claim 1 or 2, wherein
the pitch sensor can generate a signal upon sensing
the scale holes on a scale disk, and said signal
is coupled into said control unit so as to have
comparison with the length and the number of sheets,
and then said control unit generate an output signal
for controlling said clutch and brake to drive said
driving roller to feed or to stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08718450A GB2207628A (en) | 1987-08-04 | 1987-08-04 | A machine for sealing and cutting plastic bag material into plastic bags |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08718450A GB2207628A (en) | 1987-08-04 | 1987-08-04 | A machine for sealing and cutting plastic bag material into plastic bags |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8718450D0 GB8718450D0 (en) | 1987-09-09 |
| GB2207628A true GB2207628A (en) | 1989-02-08 |
Family
ID=10621806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08718450A Withdrawn GB2207628A (en) | 1987-08-04 | 1987-08-04 | A machine for sealing and cutting plastic bag material into plastic bags |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2207628A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2229127A (en) * | 1989-01-20 | 1990-09-19 | Senior Bigwood Limited | Separating apparatus |
| GB2229956A (en) * | 1988-09-24 | 1990-10-10 | Bore Steel Group Limited | Cutting blanks from strip material |
| CN101797815A (en) * | 2009-02-05 | 2010-08-11 | 时云庆 | Elliptical gear device for adjusting cutting knife of three-dimensional bag roll paper |
-
1987
- 1987-08-04 GB GB08718450A patent/GB2207628A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2229956A (en) * | 1988-09-24 | 1990-10-10 | Bore Steel Group Limited | Cutting blanks from strip material |
| GB2229127A (en) * | 1989-01-20 | 1990-09-19 | Senior Bigwood Limited | Separating apparatus |
| CN101797815A (en) * | 2009-02-05 | 2010-08-11 | 时云庆 | Elliptical gear device for adjusting cutting knife of three-dimensional bag roll paper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8718450D0 (en) | 1987-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |