GB2075473A - Feeding sacks or bags - Google Patents
Feeding sacks or bags Download PDFInfo
- Publication number
- GB2075473A GB2075473A GB8113780A GB8113780A GB2075473A GB 2075473 A GB2075473 A GB 2075473A GB 8113780 A GB8113780 A GB 8113780A GB 8113780 A GB8113780 A GB 8113780A GB 2075473 A GB2075473 A GB 2075473A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sack
- length
- stack
- sacks
- lengths
- 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
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
- B65H3/0816—Suction grippers separating from the top of pile
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Sacks, tubes or sack lengths (22, 22') are removed sequentially from the top of a stack (11) horizontally in a direction generally at right angles to their length with the aid of suction heads (17). In the initial stage of movement from the top of the stack there is at least a major component of movement in the direction of the length of the sack, tube or sack length (22, 22') produced by the circular movement of the crossbar (25) supporting the suction heads. The arrangement avoids rolling over of the plies of the top sack during removal from the stack (11). <IMAGE>
Description
SPECIFICATION
Feeding sacks or bags
This invention relates to a method and
apparatus for the purpose of feeding paper or
plastic sacks or bags, (referred to hereinafter for
convenience as sacks), one by one from the top of
a stack of sacks, and for similarly feeding tubes or
sack lengths during the manufacture of sacks.
Considerable difficulty has been encountered
when attempting to feed sacks, tubes or sack
lengths horizontally in their own plane in a
direction at right angles to their major dimension
(length) such as is required, for example, when
feeding sack lengths to a machine for forming a
stitched end closure across one end of the length.
The difficulty arises from the fact that the friction
beneath the underneath of the top sack length and
the top of the next sack length below tends to be
sufficiently great that when a horizontal force is
applied to the top of the top sack length the sack -length perfqrms a rolling motion with the ply or
plies on the top side of the sack length sliding over
the ply our plies on the underneath side of the sack
length. This effect is pronounced when the sack,
tube or sack length has longitudinal side gussets.
It is an object of the present invention to
provide an improved method and apparatus for
feeding sacks, tubes or sack lengths in which the
above difficulty is effectively overcome.
The present invention consists in a method of
feeding sacks, tubes or sack lengths one by one
from the top of a stack horizontally in a direction
generally at right angles to their length, wherein in
the initial stage of movement from the top of the
stack there is at least a major component of
movement in the direction of the length of the
sack, tube or sack length.
The invention further consists in apparatus for
feeding sacks, tubes or sack lengths one by one
from the top of a stack horizontally in a direction
generally at right angles to their length, wherein
means are provided for applying force in a
horizontal direction to the uppermost sack, tube or
sack length of the stack such that in the initial
stages of movement from the top of the stack
there is at least a major component of movement
in the direction of the length of the sack, tube or
sack length.
In the accompanying drawings: Figure 1 is a diagrammatic plan view of one
form of apparatus for carrying out the present
invention; and
Figure 2 is a diagrammatic section taken a line
2-2 of Figure 1 apparatus of Figure 1.
In carrying the invention into effect, the
invention will be described by way of example
with reference to the feeding of sack lengths, one
by one, from the top of a stack 11 of sack lengths
to pairs of horizontal conveyors 12 and 13 for
feeding the sack lengths at right angles to the
direction of their length onto a stitcher table 14
having a stitching machine (not shown) for
providing a sewn end closure at the end of each
sack length.
The stack 11 of such lengths rests upon a
pneumatic elevator 1 5 having height control so
that the top sack length is always at the level of
the entry level to conveyors 12 and 13. Further
stacks such as stack 11' are delivered when
required by conveyor 16, and are fed to the
bottom of the stack 11 so that a continuous
supply of sacks can be delivered to the stitcher
without gaps.
Mounted above the stack 11 are two suction
heads 1 7 carried on a crossbar 25 pivotally
connected by arms 1 8 to fixed supports (not
shown). The crossbar 25 is rotated in a circular
orbit by means of a motor 1 9 having a cranked
arm 20 pivotally connected to the crossbar 25.
Rotation of the crossbar 25 causes the heads 17
to perform circular orbits of which are shown at
17. Raising and lowering of the suction heads 17
at the appropriate moments is effected by means
of solenoids 26.
In operation, a sack length at the top of the
stack 11 is initially in the position shown as 22 in
Figure 1. The suction heads are lowered onto this
sack length when in the positions shown as 1 7 so
as to engage the sack near one of the longitudinal
margins and, after suction has been applied, arm
20 is rotated to cause the heads to move to the
positions shown as 17" and the sack length to be transported to the position shown as 22'.
The suction heads 1 7 can be designed so that
as soon as they are attached by suction to the top
surface of the top sack they move upwards slightly
to lift the sack edge slightly.
It will be appreciated that as the sack length
starts to move, it first travels in the direction of its
length and this has been found to facilitate
separation from the sack length next below by
avoiding the rolling motion described above.
Thereafter the suction on one sack length is
released and the conveyors 12 and 1 3 feed the
sack length with the leading edge 23 of the sack
length aligned with the datum line 24 for the
stitching machine. The heads 1 7 continue orbiting
in a circle until they reach position 1 7 again ready
for the next sack length.
It will be appreciated that various alternative
motions may be applied to the uppermost sack
length provided that in the initial stages of
movement from the top of the stack there is at
least a major component of movement in the
direction of its length.
1. A method of feeding sacks, tubes or sack
lengths one by one from the top of a stack
horizontally in a direction generally at right angles
to their length, wherein in the initial stage of
movement from the top of the stack there is at
least a major component of movement in the
direction of the length of the sack, tube or sack
length.
2. A method as claimed in claim 1, wherein
initially the sack, tube or sack length is moved in the direction of the length.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (11)
1. A method of feeding sacks, tubes or sack
lengths one by one from the top of a stack
horizontally in a direction generally at right angles
to their length, wherein in the initial stage of
movement from the top of the stack there is at
least a major component of movement in the
direction of the length of the sack, tube or sack
length.
2. A method as claimed in claim 1, wherein
initially the sack, tube or sack length is moved in the direction of the length.
3. A method as claimed in claim 1 or 2, wherein the sack, tube or sack length is moved along an arcuate path.
4. Apparatus for feeding sacks, tubes or sack lengths one by one from the top of a stack horizontally in a direction generally at right angles to their length, wherein means are provided for applying a force in a horizontal direction to the uppermost sack, tube or sack length of the stack such that in the initial stages of movement from the top of the stack there is at least a major component of movement in the direction of the length of the sack, tube or sack length.
5. Apparatus as claimed in claim 4, wherein the means for applying a force includes suction heads engageable with the top surface of the uppermost and means for moving the heads initially in the direction of the length of the sack, tube or sack length.
6. Apparatus as claimed in claim 5, wherein means are provided for moving the heads in an arcuate path.
7. Apparatus as claimed in claim 5 or 6, wherein the suction heads are mounted upon a common crossbar..
8. Apparatus as claimed in claim 5, 6 or 7, wherein each head is designed so that as soon as it is attached by suction to the top surface of the top sack, tube or sack length the head is moved upwardly to lift the sack, tube or sack length.
9. Apparatus as claimed in any one of claims 4 to 8, wherein the means for applying a force engages the uppermost sack, tube or sack length adjacent one of the longitudinal margins.
10. Apparatus for feeding sacks or sack lengths, substantially as described with reference to the accompanying drawings.
11. A method of feeding sacks, tubes or sack lengths, substantially as described with reference to the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8113780A GB2075473B (en) | 1980-05-06 | 1981-05-06 | Feeding sacks or bags |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8015035 | 1980-05-06 | ||
GB8113780A GB2075473B (en) | 1980-05-06 | 1981-05-06 | Feeding sacks or bags |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2075473A true GB2075473A (en) | 1981-11-18 |
GB2075473B GB2075473B (en) | 1983-11-30 |
Family
ID=26275425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8113780A Expired GB2075473B (en) | 1980-05-06 | 1981-05-06 | Feeding sacks or bags |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2075473B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10127109B4 (en) * | 2001-06-05 | 2006-02-09 | Fresenius Kabi Deutschland Gmbh | Device for removing and separating bags from pile carriers |
-
1981
- 1981-05-06 GB GB8113780A patent/GB2075473B/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10127109B4 (en) * | 2001-06-05 | 2006-02-09 | Fresenius Kabi Deutschland Gmbh | Device for removing and separating bags from pile carriers |
Also Published As
Publication number | Publication date |
---|---|
GB2075473B (en) | 1983-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |