GB2092980A - Bag opening machine - Google Patents
Bag opening machine Download PDFInfo
- Publication number
- GB2092980A GB2092980A GB8202774A GB8202774A GB2092980A GB 2092980 A GB2092980 A GB 2092980A GB 8202774 A GB8202774 A GB 8202774A GB 8202774 A GB8202774 A GB 8202774A GB 2092980 A GB2092980 A GB 2092980A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bag
- opening machine
- bags
- conveyor
- bag opening
- 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
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
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0008—Opening and emptying bags
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Abstract
A bag opening machine has an endless conveying band provided with spikes which conveys a bag (impaled on the spikes thereof - when in an extended position) to and past cutting means which act to make a continuous cut around three sides of the bag so that after cutting thereof it comprises two halves joined only at the rear or trailing side of the bag, unfolds the two halves of the bag as the half thereof engaged by said spike members is drawn to the forward end of the conveyor, thus to empty the contents of the bag into receiving means therefor and releases the emptied bag (by retraction of said spike members) to collection means therefor. <IMAGE>
Description
SPECIFICATION
Bag opening machine
This invention concerns a bag opening machine of the kind (hereinafter termed "of the kind referred to") which receives bags, usually but not necessarily in the form of sacks made from paper or sheet plastics material, and feeds them past means for cutting the bags to permit them to be opened for emptying.
Many kinds of bag opening and emptying machine are known. Commonly encountered problems include the need to orientate and position the bags with some accuracy before presenting them to the cutting means and not wholly complete emptying either on account of the way in which the bag is cut or subsequently manipulated for emptying.
It is an object of the present invention to provide a bag opening machine which overcomes, at least to some extent, the problems aforesaid.
According to the present invention, there is provided a bag opening machine comprising a conveyor in the form of an endless band carried by rear and forward guide rollers and equipped with spike members which can be extended outwardly from and retracted inwardly of the conveying surface of the band and means for feeding a bag to be opened and emptied to the conveyor, which is arranged::
(i) to convey the bag (impaled on the spikes thereof - when in their extended positions) to and past cutting means which act to make a continuous cut around three sides of the bag so that after cutting thereof it comprises two halves joined only at the rear or trailing side of the bag
(ii) to allow the two halves of the bag to unfold as the half thereof engaged by said spike members is drawn to the forward end of the conveyor, thus to empty the contents of the bag into receiving means therefor and
(iii) to release the empty bag (by retraction of said spike members) to collection means therefor.
The invention will be further apparent from the following description, with reference to the Figures of the accompanying drawings, which show, by way of example only two forms of bag opening machine embodying the invention.
Of the drawings:
Figure 1 shows a side elevation of one form of the machine;
Figure2 shows a plan view of the machine of
Figure 1;
Figure 3 shows an enlarged fragmentary view of the spiked conveyor of the machine of Figure land Figure 4 shows a side elevation of a second form of the machine.
Referring to Figure 1 of the drawings, it will be seen that bags to be opened and emptied are fed into the machine by a roller conveyor 10, which transfers them to a spiked conveyor 11 (in the form of an endless band and whose construction will be described in greater detail hereinafter) which carries them through a cutting station, generally indicated at A, and to an emptying station, generally indicated at B. Precise positioning and orientation of the bags on conveyor 10 and hence conveyor 11 is not required as will become apparent hereinafter.
At the cutting station A are two rotatable cutting discs 12 and 13, disposed in a horizontal plane and mounted for rotation on vertically extending shafts 14 and 15 respectively which carry, on their upper ends, drive pulleys 16 and 17 driven by V-belts 18 and 19 by drive motors 20 and 21. The shafts 14 and 15 are carried in bearings at the end of arms 22 and 23 mounted for pivotal movement at the axes of the motors 20 and 21. The arms 22 and 23 are free to turn about the axes of the drive motors and are equipped with rollers 24 and 25 running on arcuate tracks 26 and 27 for support. The arms 22 and 23 are urged inwardly and rearwardly by resilient spring means (not shown) to position the cutting discs 12 and 13 substantially centrally of the path along which the bags are conveyed by the conveyors 10 and 11.Most importantly, one of the arms, here 23, is positioned behind the other for reasons which will be discussed hereinafter.
Referring now to Figure 3, it will be seen that the spiked conveyor 11 is formed from a plurality of transversely extending slats 30 extending between endless chains 31,32 carried on rear sprocket wheels 35,36 and front sprocket wheels 33,34 comprising guide rollers. Associated with each slat 30 is a rod 37 rotatable relative to the chains 31,32 and carrying a plurality of transversely spaced curved spikes 38 which are urged by torsional springs 37a into a position where they protrude outwardly of the conveying surface of the slats 30 through apertures 39 therein. At one side of the spiked conveyor 11 and extending rearwardly from a position midway along the lower run of the chains 31,32 and following the path of the chains to a position adjacent the feeding end of the roller conveyor 10 is a cam member 40.
Each of the rods 37 is provided with a cam follower 41 which engages with the cam 40 whilst the rods pass over the cam 40 to cause the spikes 38 to retract inwardly of the conveying surface defined by the slats 30 (see Figure 3).
In use bags are fed by the roller conveyor 10 towards the spiked conveyor 11. As successive rows of spikes 38 approach the underside of bags so conveyed they are released by disengagement of the cam followers 41 from the cam 40 to impale themselves into the bag under the action of the torsional springs and carry the bag forwardly through the cutting station A. The bag thus encounters the rearmost cutting disc 12 which penetrates the bag envelope and which is then forced forwardly and laterally by continued progress of the bag to cut half of the leading edge of the bag and down one side of the bag. Shortly after the cutting disc 12 has begun to move laterally the bag is brought into engagement with the cutting disc 13 at precisely the same position as the disc 12 first contacted the bag.
In similar manner the cutting disc 13 is forced forwardly and laterally by continued progress of the bag to complete the cut through the leading edge of the bag and down the other side of the bag. As the bag reaches the end of the spiked conveyor 12 the lowermost portion of the envelope of the bag which is securely impaled on the spikes 38 (which may comprise two sets - curved in opposite directions respectively) is pulled downwardly from the remainder of the bag which is supported as it is fed over the forward guide roller before it is drawn rearwardly to follow the lower part of the bag over the forward guide roller by a screen 60 (which may be comprised by a single rod) overlying a collection hopper 50 into which the contents of the bag fall and which may be equipped with dust extraction means 51.The envelope of the bag is conveyed by the spiked conveyor 11 past rotating brush means 52, preferably of spiral construction so as to have the effect of opening out any creases in the bag so as to complete removal of any material which remains adhering to the envelope of the bag. The bag envelope is conveyed rearwardly and released from the spiked conveyor 11 by retraction of the spikes 38 to fall into a bag collection chute 53 equipped with a screw 54 which serves to compact and convey the empty bag to suitable disposal means, such as a collection sack or the like.
Since the length of the empty bag where it is
removed is twice that of the uncut bag, the conveyor loins arranged to run at half the linear speed of the
spiked conveyor 11 whereby the machine will hand
le, without interruption, a continuous supply of bags from the conveyor 10.
The shafts 14 and 15 are preferably adjustable as to height relative to the arms 22 and 23 to enable the
machine to be set up to deal with bags of different
size. Clearly the cutting discs 12 and 13 should
always be at the same level to ensure that they each
engage the bag in turn at an identical position to
ensure a continuous cut around the bag, facilitating the sure emptying of its contents as the undersurface of the bag envelope is peeled from the remain
der at the emptying station.
Turning now to Figure 4, wherein like parts are
indicated with like reference numerals, it will be seen
that in an alternative embodiment of the machine,
the spiked conveyor 11, which is of identical con
struction to that of the machine of Figure 1, is located
above the path of travel of the bags through the
machine, an additional flat bed conveyor 100 being
located beneath the path to support the weight of the
bags as they are drawn through the cutting station A.
The cutting means is similar to that of the earlier
described embodiment, the pivotal arms carrying
the cutting discs 12 and 13 extending, respectively,
from opposite sides of the machine into the space
between the conveyors 11 and 100.
In this embodiment, the conveyor 11 extends
forwardly of the conveyor 100 so that the lower
halves of the cut bags, as the hinge line between the
two halves thereof passtheforward guide roller 101
of the conveyor 100, can hang downwardly into the
collection hopper 50, before being carried over the
brush 52, to ensure complete removal of the con
tents to the hopper 50.
As in the earlier described embodiment a cam 40
is provided, which allows the spikes 38 to spring
outwardly to impale the bags at the rear end of the
conveyor 100. In this arrangement, however, the
cam 40 acts to retract the spikes 38 to release the
bags at the forward end of the conveyor 100; the empty bags being guided by a chute 102 to the collecting screw 54, which is located at the forward end of the machine.
This embodiment is especially suitable for deep bags, since the sides do not tend to fold inwardly to trap material at the forward end of the conveyor, or for bags of light weight which do not tend to be displaced by the cutting operation since during such operation they are firmly held in the nip between the conveyors 11 and 100.
It will be appreciated that it is not intended to limit the invention to the above example only, many variations, such as might readily occur to one skilled in the art, being possible, without departing from the scope thereof as defined by the appended claims.
Claims (9)
1. A bag opening machine comprising a conveyor in the form of an endless band carried by rear and forward guide rollers and equipped with spike members which can be extended outwardly from and retracted inwardly of the conveying surface of the band and means for feeding a bag to be opened and emptied to the conveyor, which is arranged:
(i) to convey the bag (impaled on the spikes thereof - when in their extended positions) to and past cutting means which act to make a continuous cut around three sides of the bag so that after cutting thereof it comprises two halves joined only at the rear or trailing side of the bag.
(ii) to allow the two halves of the bag to unfold as the half thereof engaged by said spike members is drawn to the forward end of the coveyor, thus to empty the contents of the bag into receiving means therefor, and
(iii) to release the emptied bag (by retraction of said spike members) to collection means therefor.
2. A bag opening machine according to claim 1, wherein the conveyor is located beneath the path over which the bags travel and unfolds the two halves of the bag by drawing the half thereof engaged by said spike members over the forward guide roller, there being screen means to support the upper half of the bag envelope as it is fed over the forward guide roller and before it is drawn
rearwardly to follow the lower half around the forward guide roller.
3. A bag opening machine according to claim 1, wherein the conveyor is located above the path of travel of the bags through the machine and extends forwardly of a further coveyor which supports the weight of the bags as they pass the cutting means to feed emtpy bags from its underside to collection
means therefor at the forward end of the machine.
4. A bag opening machine according to any
preceding claim wherein said endless band incorpo
rates transversely extending rods rotatable relative to the conveying surface of the band and carrying
said spike members, there being resilient means
urging said rods to a position where the spike
members protrude outwardly from the conveying
surface and for each rod a cam follower member
which cooperates with cam means whereby the rods
are rotated against the action of said resilient means to retract the spike members and subsequently release them at the required positions in the closed loop traversed by the rods.
5. A bag opening machine according to claim 4 wherein said endless band comprises two transversely spaced endless chains carried by rear and forward sprocket wheels comprising said guide rollers and a plurality of spaced transverse slats extending between said chains.
6. A bag opening machine according to any preceding claim wherein said cutting means comprises two cutters which are arranged for movement forwardly (that is in the direction of travel of the bags) and laterally to opposite sides respectively of the path of travel of the bags against the action of resilient means which act to urge the cutters inwardly and rearwardly, one of said cutters being located behind the other whereby each cutter engages each bag in cutting relationship in precisely the same position on the bag surface to ensure a continuous cut around three sides of the bag.
7. A bag opening machine according to claim 6 wherein each cutter comprises a cutting disc disposed in a plane parallel with an upper conveying surface of said endless band.
8. A bag opening machine according to any preceding claim including rotatable brush means adapted to engage the inside surface of the bag envelope as it is unfolded and emptied.
9. A bag opening machine substantially as described herein with reference to and as illustrated by the Figures of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8202774A GB2092980B (en) | 1981-02-14 | 1982-02-01 | Bag opening machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8104670 | 1981-02-14 | ||
GB8202774A GB2092980B (en) | 1981-02-14 | 1982-02-01 | Bag opening machine |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2092980A true GB2092980A (en) | 1982-08-25 |
GB2092980B GB2092980B (en) | 1984-07-04 |
Family
ID=26278447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8202774A Expired GB2092980B (en) | 1981-02-14 | 1982-02-01 | Bag opening machine |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2092980B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0114157A2 (en) * | 1983-01-18 | 1984-07-25 | Henri Schepens | Device for the continuous and automatic opening and emptying of bags |
GB2138769A (en) * | 1983-03-31 | 1984-10-31 | Bel Tyne Company Limited | Apparatus for opening and emptying bags |
EP0198685A1 (en) * | 1985-04-16 | 1986-10-22 | Palamatic Handling Systems Limited | Bag slitting and emptying machine |
EP0492926A1 (en) * | 1990-12-22 | 1992-07-01 | Palamatic Handling Systems Limited | Bag slitting machine |
WO1992021566A1 (en) * | 1991-06-07 | 1992-12-10 | George Weston Foods Limited | Bread unwrapping apparatus |
WO2012162793A1 (en) * | 2011-05-27 | 2012-12-06 | Luxme Holding Inc. | Automatic bag slitter, and method of use thereof |
CN108460916A (en) * | 2017-12-29 | 2018-08-28 | 张飞龙 | A kind of Vending Machine with packaging opening device |
CN111099095A (en) * | 2018-10-26 | 2020-05-05 | 天津润澍机械有限公司 | Bale breaker |
CN113895742A (en) * | 2021-11-27 | 2022-01-07 | 王德喜 | Cement bag unpacking device |
-
1982
- 1982-02-01 GB GB8202774A patent/GB2092980B/en not_active Expired
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0114157A2 (en) * | 1983-01-18 | 1984-07-25 | Henri Schepens | Device for the continuous and automatic opening and emptying of bags |
EP0114157A3 (en) * | 1983-01-18 | 1984-08-08 | Henri Schepens | Device for the continuous and automatic opening and emptying of bags |
GB2138769A (en) * | 1983-03-31 | 1984-10-31 | Bel Tyne Company Limited | Apparatus for opening and emptying bags |
EP0198685A1 (en) * | 1985-04-16 | 1986-10-22 | Palamatic Handling Systems Limited | Bag slitting and emptying machine |
EP0492926A1 (en) * | 1990-12-22 | 1992-07-01 | Palamatic Handling Systems Limited | Bag slitting machine |
US5352082A (en) * | 1990-12-22 | 1994-10-04 | Palamatic Handling Systems Limited | Bag slitting machine |
WO1992021566A1 (en) * | 1991-06-07 | 1992-12-10 | George Weston Foods Limited | Bread unwrapping apparatus |
WO2012162793A1 (en) * | 2011-05-27 | 2012-12-06 | Luxme Holding Inc. | Automatic bag slitter, and method of use thereof |
CN108460916A (en) * | 2017-12-29 | 2018-08-28 | 张飞龙 | A kind of Vending Machine with packaging opening device |
CN108460916B (en) * | 2017-12-29 | 2024-05-28 | 张飞龙 | Automatic vending machine with package opening device |
CN111099095A (en) * | 2018-10-26 | 2020-05-05 | 天津润澍机械有限公司 | Bale breaker |
CN113895742A (en) * | 2021-11-27 | 2022-01-07 | 王德喜 | Cement bag unpacking device |
Also Published As
Publication number | Publication date |
---|---|
GB2092980B (en) | 1984-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4504183A (en) | Bag opening machine | |
US4551885A (en) | Fish decapitator and eviscerator | |
US6308600B1 (en) | Method of orienting and positioning vegetables on a pocketed conveyor | |
GB2092980A (en) | Bag opening machine | |
KR102161553B1 (en) | Garlic stem cutting and garlic head sorting apparatus | |
US4220080A (en) | Machine for pitting and stuffing olives | |
US2660324A (en) | Apparatus for opening and emptying bags | |
JPH04500493A (en) | Device for separating cigarette packs in preparation for cigarette tobacco recovery | |
US4815168A (en) | Method and apparatus for dividing up the body of slaughtered poultry | |
US3629904A (en) | Shrimp-deheading machine | |
US2752967A (en) | Seed potato separator and cutter | |
US3688828A (en) | Potato-seed cutting machines | |
DK171175B1 (en) | Improved device for opening plastic bags | |
GB2077577A (en) | Apparatus for peeling crops, such as bulbs or tubers | |
US2166939A (en) | Fish cutting and cleaning machine | |
US3968623A (en) | Wrap-around carton forming machine | |
US4510740A (en) | Tobacco harvester | |
US3076998A (en) | Poultry gizzard splitting and washing apparatus | |
US4248903A (en) | Method for obtaining folded stuffing pieces of pimento | |
US1780005A (en) | End-closing machine for paper bags | |
US2599694A (en) | Fish cutting and cleaning machine | |
US2002419A (en) | Oil well cement mixer | |
CN215554785U (en) | Waste paper unpacking device | |
JPS6343881Y2 (en) | ||
GB2096492A (en) | Grader for articles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
708B | Proceeding under section 8(1) patents act 1977 | ||
PCNP | Patent ceased through non-payment of renewal fee |