CA1102362A - Method and apparatus for bale weight control - Google Patents
Method and apparatus for bale weight controlInfo
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- CA1102362A CA1102362A CA316,025A CA316025A CA1102362A CA 1102362 A CA1102362 A CA 1102362A CA 316025 A CA316025 A CA 316025A CA 1102362 A CA1102362 A CA 1102362A
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Abstract
Abstract of the Disclosure The total weight of fibrous material delivered to a packaging device, such as staple textile fiber delivered to a baling press, is controlled so as to facilitate achieving more uniform package weight in accordance with a method and through the use of an apparatus in which material is successively accumulated into batches, each of which is a fractional portion of a desired package weight. Batches are accumulated and released as the actual weight of each delivered batch is determined and registered and the regis-tered actual weights of the successive batches are totaled. The weight of at least certain batches in the succession is then adjusted in such a manner as to closely control the total weight. A
weigh container having an inlet and an outlet is interposed between and opera-tively communicates with a source of supply of fibrous material, such as a tow cutter, and a packaging device, such as a baling press. A load cell is provided which signals the weight of material supported by the weigh container.
weigh container having an inlet and an outlet is interposed between and opera-tively communicates with a source of supply of fibrous material, such as a tow cutter, and a packaging device, such as a baling press. A load cell is provided which signals the weight of material supported by the weigh container.
Description
3~
Certain fibrous materials which are sold prim~rily by weight measure are processed or manufactured in substantially continuous processes. One example of such a material is staple textile fiber, which is comrnonly sold by fiber processors or producers to texkile manufacturers on a weight basis. Staple textile fiber includes natural fibrous materials such as cotton, wool and flax as well as man-made or synthetic fibrous materials such as nylon, cellulose acetate, rayon, acrylics, polyester and polypropylene~ Particularly with regard to man-made fibrous materials, the manufacture of the fiber is a substantially continuous process in which a tow is spun. Substantial effort has been devoted to the development of methods and apparatus for producing tow and cutting that tow into staple textile fiber in a substantially continuous manner.
As is true with other fluent or flowing materials sold by weight measure, it is desirable if not necessary for sellers and buyers of staple text:ile fiber to know substan-tlally the exact weight measure o~E each package or bale and the total weiyht of rnaterial transferred in any particular transaction. Heretofore, particularly with staple textile fiber, the practice has been to package material and subse-quently weigh the package of material to determine the actual weight of the package or bale. The package or bale is then marked with the actual weiyht and, if the bale weight is outside predetermined limits ~or weight variation tolerance, the bale is taken apart and reprocessed into other packages or bales.
~s can be appreciatea, substantial variation in bale or package weight frorn ~ale to bale introduces significant difficulty of inventory control in filling orders which may be .. . . ... .... . ...
-. , .
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expressed in ~erms of specific desired total weights. Further, and particularly with staple textile fiber, bales of signifi-cantly varying weiyhts present difficulty for textile manu-facturers seeking to blend fibers in a particularly desired weight ratio or percentage. In the specific instance of staple textile fiber, it has become common to encounter variations in bale weight on the order of sixty to one hundred pounds above or below a desired package weight, in circumstances where the desired package weight i5 in a range of from about four hundred fifty pounds to about eight hundred pounds. The percentage fluctuation represented can be appreciated as con-tributing to the difficulties encountered prior to development of the present invention.
With the aforementioned difficulties and deficiencies in mind, it is an object of this invention to facilitate achieving more uniform package ar bale weights in the proces-s~ng and handling of fibrous materials such as staple textile ~iber. In realiziny this object of the present invention, a continuing flow of fibrous material is divided into a succession of batches, each of which is a fractional portion of a desired package or bale weight. Batches are accumulated and released as required to deliver a total weight of material substantially equal to a desired package weight, while the actual delivered weights of successive batches are determined, registered and totaled. The weight of at least certain batches in the succession is adjusted as required for closely c3ntrolling the total weight of material delivered.
Another object of this invention is to package fibrous materials in packages of consistently substantially equal weight. In realizing this object of the present invention, , ~
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successive pac~ages formed are each formed to have the same weightr within close tolerances. Thus, transfer of a desired total w~ight of fiber in any transaction is simplified in that packages or bales of standardized weight may be selected at random rather than requiring careful selection of packages totaling the desired weight.
A further object of this invention is to take into account~ in achieving a desired total package weight, quan-tities of staple textile fiber which may for various reasons and varying lengths of time be delayed in movement to a baling press or packaging means~ More particularly, in the event that a given quantity of fiber for some reason is inadvertently trapped or hung up in the flow path of material being batched and weighad~ the arrangement of the present invention deter-mines and takes into consideration the weight of such fiber.
In realizing this object of the present invention, control cir-cuitry responds to load cell signals indicative of the weight of a weigh container and material supported thereby, with the : response of the controller being such as to add or adjust subsequent weights a5 nece5sary to compensate for "in-flight~
fiber and fiber inadvertently retained, all as described more fully hereinafter~
Yet a further object of this invention is to facili- :
tate blending of fibrous materials delivered into a further '!
manufacturing process. More particularly, the division of a continuing flow of fibrous material into a succession of batches and adjustment of weight of such batches is contemplated as accomplishing substantially continuous, on going process control capable of delivering continuing flows of each of a plurality of different fibrous materia].s, thereby accomplishing blending of the materials in predetermined ratios.
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This invention relates to a process for forming more uniform weight packages of fibrous material comprising supplying a contin-uing flow of fibrous material, successively accumulating said material into batches having weights which are subject to variance from batch to batch J each batch having a weight which is a fractional portion of a desired package weight, successively releasing the batches of matexial to a packager, determining the actual weight of each batch delivered to the packager and registering such actual weight while totaling the registered actual weights of the successive batches, adjusting the weight of at least certain batches in the succession based upon the registered actual weights to compensate for any variance in batch weights and thereby more closely control the total weight of material delivered to the packager and facilitate achieving more uniform package weight~ and packaging the material which has been delivered to the packager.
This inve~tion further relates to apparatus for forming more uniform weight packages of fibrous material and comprising means for supplying fibrous material; packaging means for packaging fibrous material; weigh container means having an inlet and an outlet each with respective means for opening and closing the same and respect-ively operatively communicating with said material supply means and said packaging means for admitting fibrous material from said supply means and for releasing material to be delivered to said packaging means in a succession of batches, said weigh container means supporting material as the material is accumulated into batches having weights which are subject to variance from batch to batch, each batch havi.ng a weight which is a fractional portion of a desired package weight; load cell means operatively connected with said weigh container means for signaling the weight of material supported by said weigh container means; and programmed control means opera-tively connected with said opening and closing means for controllably actuating said inlet and outlet and with said load cell means for recieving therefrom signals indica-tive of the weight of material supported by said weigh container means, said control means -4a-~Z36;2 jkermining the actual weight of each batch delivered to said packaging means and registering such actual weight while total-ing the regis~ered actual weights and adjusting the weight of at least certain batches in the succession to compensate for variance in batch weights and thereby more closely control the total weight of matexial delivered to said packaging means.
Some of the objects and advantages of the invention having been stated, other objects and advantages will appear as the de-scription proceeds when taken in conjunction with the accompanying drawings in which:
Figure 1 is a schematic elevation view of certain apparatus incorporated in an operating embodiment of the present invention;
Figure 2 is a schematic diagram of an apparatus in accordance with the present invention, arranged to illustrate the flow of material in accordance with the method of the present invention;
Figure 3 is a program flow chart indicative of the steps of one program to be followed by control circuitry in the practice of the method of this invention; and Figure 4 i5 a diagram similar to Figure 3, illustrating an alternative seriss of steps to be followed by control circuitry.
While the present invention will be described hereinafter with more particular reference to the accompanying drawings, it is to be understood at the outset that the following more detailed des`cription of this invention and the accompanying drawings are directed to the persons skilled in the applicable arts. It is anticipated that such persons skilled in such arts will be able, from the illustration and description of a presently preferred mode and arrangement of the present invention, to modify methods and apparatus while embodying the substance of the present invention. Accordingly, the following description is to be read as a broad teaching of this invention, and not as being restrictive on the scope of protection to which this invention is properly entitled.
JI~ 362 The present invention contempla-tes that fibrous material to be packaged or delivered to a suhsequent manufac-turing process such as a blending process is supplied in a continuing flow. More particularly, such material in the ~orm of staple textile fiber results from the delivery of a filamen-tary textil~ tow from any appropriate and desired process and apparatus. The manufacture of such filamentary textile tow forms no part of the present invention and is well known to persons skilled in the applicable fiber producing arts. As is known to such persons, filamentary textile tow is commonly delivered to cutter means for cutting the filamentary textile tow into staple textile fiber. Again, the specific structure and operation of a tow cutter is known to persons skilled in the applicable arts and accordingly will not be here described in great detail. Interested readers may refer to relevant prior patents directed specifically to inventions relating to tow manufacture and cutting. Staple fiber cut by any such tow cutter is, in the apparatus of Figure 1, delivered to a holding chute 10 by any suitable means~
Heretofore, staple textile fiber produced on a substantially continuous basis by cutting filamentary textile tow has been delivered to a packaging means in the form of a baler means or baling press. One form of baling press has been generally indicated at 11 in Figure 1, but will not be here described in detail as detailed disclosures of baling presses are available to interested readers from prior patents issued in relevant arts. Similarly, blending apparatus suitable for receiviny continuing flows of each of a plurality of different fibrous materials are known to skilled persons.
In accordance with the present invention, fibrous material in the form of staple textile fiber passes from the .. .. . . . .
~ 2~62 ~o~ cutt~r to the balex 11 or to a blending apparatus (not shown) in a succession of batches accumulated in a weigh container generally indicated at 12 The weigh containex 12 has an inlet 14 and an outlet 15, each with respective means for opening and closing to respectively control admission of material inko the weigh container from the tow cutter 10 and delivery of material from the tow cutter to the baler 11.
The weigh container 12 is supported by an appropriate arrange-ment of balance beams 16, including a load cell 18 which responds to imposition of weight or force by the weigh con-tainer and its contents by signaling the load or weight imposed.
Preferably, ancl as described more fully hereinafter, the load cell 18 produces an analog ele~trical signal indicative of force loading or weight to which the load cell 18 is subjected.
In accordance with the present invention, a pro- -grammed control circuit means preferably at least in part in the form of an electronic microprocessox indicated at 20 is `
operatively connected with the load cell 18 for receiving signals therefrom and with the inlet and outlet 14, 15 of the weigh container 12 for controlliny the opening and closiny thereof. The programmed control means additionally is con-nected with certain operator set input devices and certain digital display devices, as described more fully hereinafter.
As will be described hereinafter, the programmed control means functions for determining the actual weight of a batch of fiber delivered to the baler, for registering the actual weight of the delivered batch, for opening and closing the inlet and outlet in sequence as required to accumulate and deliver successive batches having a total weight of fiber substantially equal to a desired bale weight, for determining and registering ~3Z3~i~
the actual weights of the successive batches while totaling the registered actual weights, ancl for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of material delivered.
The present invention contemplates that the program-med control means may take a number of specific fonns and may be selected from among available devices or by assembly of a plurality of such devices by persons skilled in the applicable arts, once an understandiny of the present invention has been obtained by reading this description thereof. Accordingly, and due to the rapid rate o~ change of commercial products offered as progra~ed or programmable control means and as components thereof, the following description will not specif-ically indicate precise commercial devices to be employed.
Instead, the functions sought will be described in a manner su~ficient to inform the persons skilled in the appropriate art.
As illustrated in Figure 2, separate memory areas are provided for certain recording functions to be described more fully hereinafter. As will be appreciated by knowledge-able persons, such memory areas are not usually readily definable in terms of specific hardware or components but are commonly defined by programming ox "software". As a result, what has been shown and will be described as separate memory means can be and usually are accommodated within varying numbers and types of chips, ma~netic devices and the like. Tha present description will not, for the reasons given above, attempt to fully review the range of such choices available to the skilled computer technologist. Similar input-output devices, sensors and the like will not be fully reviewed.
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,:..i, 3~2 By way of example, the inlet 14 and outlet 15 may be operated pneumatically, hydraulically, electrically or by other appropriate means. Accordingly, it is contemplated that ~he control means ei~her be compatible with such varying modes of actuation or be interfaced to the selected mode by an appropri.ate input or output device. As will be appr~ciated, the same circumstances apply with re~ard to the load cell means 18, as it is known that load cells signaling in various appropriate manners are a~ailable~
As indicated a~ove, it is preferred that the programmed control means at least in part take the form of an electronic microprocessor 20. In such a form, appropriate input devices in the form of thumbwheel switches or the .ike .
are provided as a desired bale weight input device 21, a ~ ;~
desired batch weight input device 22, and an adjusted weight input device 23. The input devices are mounted on or in a control cabinet, for access by an operator or.supervisor as management may decide. Informatiorl manually set up or indicated on the input devices 20, 21, 23 is available to and may be employed by the m.icroprocessox 20. The m.icroprocessor operatively communicates with memory means either provided within the microprocessor or provided by selected auxil.iary devices. In accordance with this invention, the memory means include a predetermined weight memory means 24, a full container memory means 25, and empty container memory means 26, and an "in-flight" memory means 270 Interaction among the various inputs, outputs and memory means is controlled by a central processing Ullit or processing means incorporated within the microprocessor 20 and possibly forming substantially the only component thereof.
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The process of the present invention includes supplying a continuing flow of fibrous material, preferably by cutting ~ilamentary textile tow into staple textile fiber through operation of the cutter 10 referred to hereinabove.
Under the control of the microprocessor 20, which may be set in motion by means of a manual start signal or by a program step as described hereinafter, the inlet 14 to the weigh container 12 is opened and fiber is admitted thereinto while the load cell 18 signals the weight of the container and fiber suppoxted thereby. Signals originating from the load cell means 18 are received as an input by the microprocessor, which has carried into the predetermined weight memory means 24 the desired batch weight indicated by the setting of the appropriate input device 22 r when the preparation of an individual bale has just been initiated. Upon the signaled weight increasing to a predetermined weight corresponding to the weight recorded in the predetermined weight memory means 24, the inlet 14 is closed and the admission of fiber to the container 12 is s~opped.
~s will be appreciated, the desired batch weight and the weight indicated by the predetermined weight memory 24 may be substantially less than the quantity of fiber or material required to occupy the entirety of the weigh container means 12. Accoxdingly, upon closure of the inlet 14, some fiber or material may be "in-flight" within the weigh container 12 and not be supported thereby so as to contribute to the total weight then instantaneously being signaled by the load cell means 18. Accordingly, a predetermined interval of time is allowed by the program of the microprocessor 20 for such "in~flight" material to settle within and be supported by the -la-weigh container means 12r Thereafter, the microprocessor 20 records in the full container memory means 25 a signal orig:in-ated from the load cell means 18 and indicative of the weight oE the batch of fiber then supported within the weigh container means 12. The outlet 15 is then opened to release fiber from the weigh container means 12 to the baler 11.
The batch of fiber thus released has a weight which is a fractional portion of a desired bale weight, as manually indicated by the setting of the appropriate input device 21.
Thus, it is necessary that a plurality of such batches be accu~lulated and released, in successionf in order to supply to the baler 11 that ~uantity of fiber or material which is to be packaged together. However, the successive batches have weights which are for a number of reasons subject to variance.
In order to assure that the final total weight of material delivered for packagin~ closely approaches the desired bale weight, provision is made for determining the actual weight of each delivered batch. More particularly~ after closure of the outlet 15 and prior to opening of the inlet 14, the microprocessor 20 again notes the weight of any fiber retained within the weigh container means 12 as signaled by the load cell means 18 and records a signal indicative of such weight in the empty container memory means 26. The availability of a recorded signal indicative of full container weight in the full con-tainer memory means 25 and a recorded signal indicative of empty container weight in the empty container memory means 26 permits comparison of the recorded signals so as to compute quite accurately the actual weight of the delivered batch of fiber.
3~2 As can be appreciated, the steps of opening and clc~sing the inlet and outlet 14, 15 are repeated as requirad to deliver successive batches having a total weight substan-tially equal to the desired package weight, while the actual weights of the successive batches are determined and registered.
As this occurs, the registered actual weiyhts of the successive batches are totaled and preferably are displayed at some form of direct digital display device visible to an operator of the packaging sys~em or the baler means 11. Repetition of the steps of deli~ering successive batches will, in accordance with the present invention, result in formation of successive packages of substantially equal weight. Thus~ a succession of packa~es formed in accordance with this invention may be readily substituted one for another without unacceptably large flu~tuation in the total fiber weight transferred. Similarly, repetition of the steps over more or less extended intervals of time result in delivery of fibrous material at a known rate of flow which facilitates other substantially continuous pxocesses such as blending of different fibers.
In accordance with important characterizing features of this invention, the weight of at least certain batches in the succession is adjusted by the microprocessor 20 in order to more closel~ control the total weight of fiber delivered to the packaging or baler means 11 and so as to facilitate achieving more uniform bale weight. The present invention contemplates that the programming of programmed control circuitry means such as the microprocessor 20 may be accom~
plished by persons skilled in the applicable arts once an understanding of the present invention has been gained from the descripkion provided herein. As one example of a set of instructions for a programmed control means, Figure 4 of i2 the accompanying drawings sets out a programming tlow chart in whlch the s~bol ~1 indicates a batch weiyht as may be manually set on the desired batch weight input device 22 and the symbol B2 represents a desired bale weight as may be manually set at the desired bale weight input device 21. The symbol Nl represents the total number of batches required to deliver a total weight of fiber substantially equal to the desired bale weight, while the symhol NA represents the number of batches which have been previously delivered through the weigh container means in the process of delivering a desired bale weight of fiber. The symbol WT represents total weight actually delivered in a succession of batches, while Q WTOT represents a total of "in-flight" weigh~s computed during processing of a succession of batches. The symbol Wl is employed to repre-sent the predetermined weight of material or fiber to be admitted to the weigh container means 12, as recorded in the predetermined weight memory means 24 and as adjusted during the progress of the program~ The symbol W2 represents the weiyht of material in the weight container means 12 immediately prior to op~nin~ o the outlet 15, as may for example be recorded in the full container memory means 25. The symbol W3 represents the weight of any material or fiber which may be retained in the weight container means 12 after discharge of a batch therefrom, as may be recorded in the empty container memory means 26. The symbol ~ W represents the weight of "in-flight" fiber which is passing in the weigh container 12 immediately after closure o~ the inlet 14 and is subsequently supported by the weigh container means 12 prior to opening of the outlet 15, while the symbol a WA indicates a computed average of a W weights for successive batches.
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As will be apparent to knowledgeable persons from Figure 3 of the accompanying drawings and the above elucidation of the symbols thexe employed, the signal recorded in the predetermined weight memory means 24 may be adjusted duriny processing of each batch in the succession of batches, so that the accumulating total weight of fiber is continually adjusted to approximate an ideal staircase or stepwise increase to the desired total bale weight. An alternative program achieving substantially the same results may defer adjustment of the predetermined weight until the last few or one batch in a succession of batches. A program flow diagram for such an arrangement is indicated in Figure 4, where symbols con-sistent with those described with reference to Figure 3 have been used, with one exception~ The program diagramed in Figure 4 provides for the computation of a weight remaining to complete a desired bale welght, s~mbolized as WREM, which is compared with desired batch weight Wl in determining the program~led adjustment to be made to Wl.
As a further alternative, this invention contemplates that the desired batch weight Wl for a known, predetermined number o~ final batches in a succession may be taken from a manually set input device such as the adjusted weight input device 23. In accordance with such a procedure, program determination that the number of batches delivered was within ZS two (or some other suitable integer) of the number required would be followed by setting Wl to be the manually determined weight rather than a computed weight~ :
It has been determined that a succession of bales produced in accordance with the methods of this invention may be quite closely controlled as to the weight of each bale in the succession, thereby permitting any one bale in the succession , ~ .
3~32 to be subs~ituted for any other one bale in ~arehousing or delivery of fiber. More specifically, a succession of bales ha~ing weights in the range of from about 450 pounds to about 800 pounds may be formed whil~ holding the variation in bale weight of any given bale in the series to the range of from about 1 pound to about 8 pounds above or below the desired bale weight. Thus, the percentage fluctuation experienced will be in the range of no more than three percent of bale weight and preferably about one percent or less.
In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation.
S,Jj -
Certain fibrous materials which are sold prim~rily by weight measure are processed or manufactured in substantially continuous processes. One example of such a material is staple textile fiber, which is comrnonly sold by fiber processors or producers to texkile manufacturers on a weight basis. Staple textile fiber includes natural fibrous materials such as cotton, wool and flax as well as man-made or synthetic fibrous materials such as nylon, cellulose acetate, rayon, acrylics, polyester and polypropylene~ Particularly with regard to man-made fibrous materials, the manufacture of the fiber is a substantially continuous process in which a tow is spun. Substantial effort has been devoted to the development of methods and apparatus for producing tow and cutting that tow into staple textile fiber in a substantially continuous manner.
As is true with other fluent or flowing materials sold by weight measure, it is desirable if not necessary for sellers and buyers of staple text:ile fiber to know substan-tlally the exact weight measure o~E each package or bale and the total weiyht of rnaterial transferred in any particular transaction. Heretofore, particularly with staple textile fiber, the practice has been to package material and subse-quently weigh the package of material to determine the actual weight of the package or bale. The package or bale is then marked with the actual weiyht and, if the bale weight is outside predetermined limits ~or weight variation tolerance, the bale is taken apart and reprocessed into other packages or bales.
~s can be appreciatea, substantial variation in bale or package weight frorn ~ale to bale introduces significant difficulty of inventory control in filling orders which may be .. . . ... .... . ...
-. , .
36~:
expressed in ~erms of specific desired total weights. Further, and particularly with staple textile fiber, bales of signifi-cantly varying weiyhts present difficulty for textile manu-facturers seeking to blend fibers in a particularly desired weight ratio or percentage. In the specific instance of staple textile fiber, it has become common to encounter variations in bale weight on the order of sixty to one hundred pounds above or below a desired package weight, in circumstances where the desired package weight i5 in a range of from about four hundred fifty pounds to about eight hundred pounds. The percentage fluctuation represented can be appreciated as con-tributing to the difficulties encountered prior to development of the present invention.
With the aforementioned difficulties and deficiencies in mind, it is an object of this invention to facilitate achieving more uniform package ar bale weights in the proces-s~ng and handling of fibrous materials such as staple textile ~iber. In realiziny this object of the present invention, a continuing flow of fibrous material is divided into a succession of batches, each of which is a fractional portion of a desired package or bale weight. Batches are accumulated and released as required to deliver a total weight of material substantially equal to a desired package weight, while the actual delivered weights of successive batches are determined, registered and totaled. The weight of at least certain batches in the succession is adjusted as required for closely c3ntrolling the total weight of material delivered.
Another object of this invention is to package fibrous materials in packages of consistently substantially equal weight. In realizing this object of the present invention, , ~
~il ,- .: . ~
, ~ .
36~
successive pac~ages formed are each formed to have the same weightr within close tolerances. Thus, transfer of a desired total w~ight of fiber in any transaction is simplified in that packages or bales of standardized weight may be selected at random rather than requiring careful selection of packages totaling the desired weight.
A further object of this invention is to take into account~ in achieving a desired total package weight, quan-tities of staple textile fiber which may for various reasons and varying lengths of time be delayed in movement to a baling press or packaging means~ More particularly, in the event that a given quantity of fiber for some reason is inadvertently trapped or hung up in the flow path of material being batched and weighad~ the arrangement of the present invention deter-mines and takes into consideration the weight of such fiber.
In realizing this object of the present invention, control cir-cuitry responds to load cell signals indicative of the weight of a weigh container and material supported thereby, with the : response of the controller being such as to add or adjust subsequent weights a5 nece5sary to compensate for "in-flight~
fiber and fiber inadvertently retained, all as described more fully hereinafter~
Yet a further object of this invention is to facili- :
tate blending of fibrous materials delivered into a further '!
manufacturing process. More particularly, the division of a continuing flow of fibrous material into a succession of batches and adjustment of weight of such batches is contemplated as accomplishing substantially continuous, on going process control capable of delivering continuing flows of each of a plurality of different fibrous materia].s, thereby accomplishing blending of the materials in predetermined ratios.
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.
3~i~
This invention relates to a process for forming more uniform weight packages of fibrous material comprising supplying a contin-uing flow of fibrous material, successively accumulating said material into batches having weights which are subject to variance from batch to batch J each batch having a weight which is a fractional portion of a desired package weight, successively releasing the batches of matexial to a packager, determining the actual weight of each batch delivered to the packager and registering such actual weight while totaling the registered actual weights of the successive batches, adjusting the weight of at least certain batches in the succession based upon the registered actual weights to compensate for any variance in batch weights and thereby more closely control the total weight of material delivered to the packager and facilitate achieving more uniform package weight~ and packaging the material which has been delivered to the packager.
This inve~tion further relates to apparatus for forming more uniform weight packages of fibrous material and comprising means for supplying fibrous material; packaging means for packaging fibrous material; weigh container means having an inlet and an outlet each with respective means for opening and closing the same and respect-ively operatively communicating with said material supply means and said packaging means for admitting fibrous material from said supply means and for releasing material to be delivered to said packaging means in a succession of batches, said weigh container means supporting material as the material is accumulated into batches having weights which are subject to variance from batch to batch, each batch havi.ng a weight which is a fractional portion of a desired package weight; load cell means operatively connected with said weigh container means for signaling the weight of material supported by said weigh container means; and programmed control means opera-tively connected with said opening and closing means for controllably actuating said inlet and outlet and with said load cell means for recieving therefrom signals indica-tive of the weight of material supported by said weigh container means, said control means -4a-~Z36;2 jkermining the actual weight of each batch delivered to said packaging means and registering such actual weight while total-ing the regis~ered actual weights and adjusting the weight of at least certain batches in the succession to compensate for variance in batch weights and thereby more closely control the total weight of matexial delivered to said packaging means.
Some of the objects and advantages of the invention having been stated, other objects and advantages will appear as the de-scription proceeds when taken in conjunction with the accompanying drawings in which:
Figure 1 is a schematic elevation view of certain apparatus incorporated in an operating embodiment of the present invention;
Figure 2 is a schematic diagram of an apparatus in accordance with the present invention, arranged to illustrate the flow of material in accordance with the method of the present invention;
Figure 3 is a program flow chart indicative of the steps of one program to be followed by control circuitry in the practice of the method of this invention; and Figure 4 i5 a diagram similar to Figure 3, illustrating an alternative seriss of steps to be followed by control circuitry.
While the present invention will be described hereinafter with more particular reference to the accompanying drawings, it is to be understood at the outset that the following more detailed des`cription of this invention and the accompanying drawings are directed to the persons skilled in the applicable arts. It is anticipated that such persons skilled in such arts will be able, from the illustration and description of a presently preferred mode and arrangement of the present invention, to modify methods and apparatus while embodying the substance of the present invention. Accordingly, the following description is to be read as a broad teaching of this invention, and not as being restrictive on the scope of protection to which this invention is properly entitled.
JI~ 362 The present invention contempla-tes that fibrous material to be packaged or delivered to a suhsequent manufac-turing process such as a blending process is supplied in a continuing flow. More particularly, such material in the ~orm of staple textile fiber results from the delivery of a filamen-tary textil~ tow from any appropriate and desired process and apparatus. The manufacture of such filamentary textile tow forms no part of the present invention and is well known to persons skilled in the applicable fiber producing arts. As is known to such persons, filamentary textile tow is commonly delivered to cutter means for cutting the filamentary textile tow into staple textile fiber. Again, the specific structure and operation of a tow cutter is known to persons skilled in the applicable arts and accordingly will not be here described in great detail. Interested readers may refer to relevant prior patents directed specifically to inventions relating to tow manufacture and cutting. Staple fiber cut by any such tow cutter is, in the apparatus of Figure 1, delivered to a holding chute 10 by any suitable means~
Heretofore, staple textile fiber produced on a substantially continuous basis by cutting filamentary textile tow has been delivered to a packaging means in the form of a baler means or baling press. One form of baling press has been generally indicated at 11 in Figure 1, but will not be here described in detail as detailed disclosures of baling presses are available to interested readers from prior patents issued in relevant arts. Similarly, blending apparatus suitable for receiviny continuing flows of each of a plurality of different fibrous materials are known to skilled persons.
In accordance with the present invention, fibrous material in the form of staple textile fiber passes from the .. .. . . . .
~ 2~62 ~o~ cutt~r to the balex 11 or to a blending apparatus (not shown) in a succession of batches accumulated in a weigh container generally indicated at 12 The weigh containex 12 has an inlet 14 and an outlet 15, each with respective means for opening and closing to respectively control admission of material inko the weigh container from the tow cutter 10 and delivery of material from the tow cutter to the baler 11.
The weigh container 12 is supported by an appropriate arrange-ment of balance beams 16, including a load cell 18 which responds to imposition of weight or force by the weigh con-tainer and its contents by signaling the load or weight imposed.
Preferably, ancl as described more fully hereinafter, the load cell 18 produces an analog ele~trical signal indicative of force loading or weight to which the load cell 18 is subjected.
In accordance with the present invention, a pro- -grammed control circuit means preferably at least in part in the form of an electronic microprocessox indicated at 20 is `
operatively connected with the load cell 18 for receiving signals therefrom and with the inlet and outlet 14, 15 of the weigh container 12 for controlliny the opening and closiny thereof. The programmed control means additionally is con-nected with certain operator set input devices and certain digital display devices, as described more fully hereinafter.
As will be described hereinafter, the programmed control means functions for determining the actual weight of a batch of fiber delivered to the baler, for registering the actual weight of the delivered batch, for opening and closing the inlet and outlet in sequence as required to accumulate and deliver successive batches having a total weight of fiber substantially equal to a desired bale weight, for determining and registering ~3Z3~i~
the actual weights of the successive batches while totaling the registered actual weights, ancl for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of material delivered.
The present invention contemplates that the program-med control means may take a number of specific fonns and may be selected from among available devices or by assembly of a plurality of such devices by persons skilled in the applicable arts, once an understandiny of the present invention has been obtained by reading this description thereof. Accordingly, and due to the rapid rate o~ change of commercial products offered as progra~ed or programmable control means and as components thereof, the following description will not specif-ically indicate precise commercial devices to be employed.
Instead, the functions sought will be described in a manner su~ficient to inform the persons skilled in the appropriate art.
As illustrated in Figure 2, separate memory areas are provided for certain recording functions to be described more fully hereinafter. As will be appreciated by knowledge-able persons, such memory areas are not usually readily definable in terms of specific hardware or components but are commonly defined by programming ox "software". As a result, what has been shown and will be described as separate memory means can be and usually are accommodated within varying numbers and types of chips, ma~netic devices and the like. Tha present description will not, for the reasons given above, attempt to fully review the range of such choices available to the skilled computer technologist. Similar input-output devices, sensors and the like will not be fully reviewed.
~7?"
,:..i, 3~2 By way of example, the inlet 14 and outlet 15 may be operated pneumatically, hydraulically, electrically or by other appropriate means. Accordingly, it is contemplated that ~he control means ei~her be compatible with such varying modes of actuation or be interfaced to the selected mode by an appropri.ate input or output device. As will be appr~ciated, the same circumstances apply with re~ard to the load cell means 18, as it is known that load cells signaling in various appropriate manners are a~ailable~
As indicated a~ove, it is preferred that the programmed control means at least in part take the form of an electronic microprocessor 20. In such a form, appropriate input devices in the form of thumbwheel switches or the .ike .
are provided as a desired bale weight input device 21, a ~ ;~
desired batch weight input device 22, and an adjusted weight input device 23. The input devices are mounted on or in a control cabinet, for access by an operator or.supervisor as management may decide. Informatiorl manually set up or indicated on the input devices 20, 21, 23 is available to and may be employed by the m.icroprocessox 20. The m.icroprocessor operatively communicates with memory means either provided within the microprocessor or provided by selected auxil.iary devices. In accordance with this invention, the memory means include a predetermined weight memory means 24, a full container memory means 25, and empty container memory means 26, and an "in-flight" memory means 270 Interaction among the various inputs, outputs and memory means is controlled by a central processing Ullit or processing means incorporated within the microprocessor 20 and possibly forming substantially the only component thereof.
_9_ 36~
The process of the present invention includes supplying a continuing flow of fibrous material, preferably by cutting ~ilamentary textile tow into staple textile fiber through operation of the cutter 10 referred to hereinabove.
Under the control of the microprocessor 20, which may be set in motion by means of a manual start signal or by a program step as described hereinafter, the inlet 14 to the weigh container 12 is opened and fiber is admitted thereinto while the load cell 18 signals the weight of the container and fiber suppoxted thereby. Signals originating from the load cell means 18 are received as an input by the microprocessor, which has carried into the predetermined weight memory means 24 the desired batch weight indicated by the setting of the appropriate input device 22 r when the preparation of an individual bale has just been initiated. Upon the signaled weight increasing to a predetermined weight corresponding to the weight recorded in the predetermined weight memory means 24, the inlet 14 is closed and the admission of fiber to the container 12 is s~opped.
~s will be appreciated, the desired batch weight and the weight indicated by the predetermined weight memory 24 may be substantially less than the quantity of fiber or material required to occupy the entirety of the weigh container means 12. Accoxdingly, upon closure of the inlet 14, some fiber or material may be "in-flight" within the weigh container 12 and not be supported thereby so as to contribute to the total weight then instantaneously being signaled by the load cell means 18. Accordingly, a predetermined interval of time is allowed by the program of the microprocessor 20 for such "in~flight" material to settle within and be supported by the -la-weigh container means 12r Thereafter, the microprocessor 20 records in the full container memory means 25 a signal orig:in-ated from the load cell means 18 and indicative of the weight oE the batch of fiber then supported within the weigh container means 12. The outlet 15 is then opened to release fiber from the weigh container means 12 to the baler 11.
The batch of fiber thus released has a weight which is a fractional portion of a desired bale weight, as manually indicated by the setting of the appropriate input device 21.
Thus, it is necessary that a plurality of such batches be accu~lulated and released, in successionf in order to supply to the baler 11 that ~uantity of fiber or material which is to be packaged together. However, the successive batches have weights which are for a number of reasons subject to variance.
In order to assure that the final total weight of material delivered for packagin~ closely approaches the desired bale weight, provision is made for determining the actual weight of each delivered batch. More particularly~ after closure of the outlet 15 and prior to opening of the inlet 14, the microprocessor 20 again notes the weight of any fiber retained within the weigh container means 12 as signaled by the load cell means 18 and records a signal indicative of such weight in the empty container memory means 26. The availability of a recorded signal indicative of full container weight in the full con-tainer memory means 25 and a recorded signal indicative of empty container weight in the empty container memory means 26 permits comparison of the recorded signals so as to compute quite accurately the actual weight of the delivered batch of fiber.
3~2 As can be appreciated, the steps of opening and clc~sing the inlet and outlet 14, 15 are repeated as requirad to deliver successive batches having a total weight substan-tially equal to the desired package weight, while the actual weights of the successive batches are determined and registered.
As this occurs, the registered actual weiyhts of the successive batches are totaled and preferably are displayed at some form of direct digital display device visible to an operator of the packaging sys~em or the baler means 11. Repetition of the steps of deli~ering successive batches will, in accordance with the present invention, result in formation of successive packages of substantially equal weight. Thus~ a succession of packa~es formed in accordance with this invention may be readily substituted one for another without unacceptably large flu~tuation in the total fiber weight transferred. Similarly, repetition of the steps over more or less extended intervals of time result in delivery of fibrous material at a known rate of flow which facilitates other substantially continuous pxocesses such as blending of different fibers.
In accordance with important characterizing features of this invention, the weight of at least certain batches in the succession is adjusted by the microprocessor 20 in order to more closel~ control the total weight of fiber delivered to the packaging or baler means 11 and so as to facilitate achieving more uniform bale weight. The present invention contemplates that the programming of programmed control circuitry means such as the microprocessor 20 may be accom~
plished by persons skilled in the applicable arts once an understanding of the present invention has been gained from the descripkion provided herein. As one example of a set of instructions for a programmed control means, Figure 4 of i2 the accompanying drawings sets out a programming tlow chart in whlch the s~bol ~1 indicates a batch weiyht as may be manually set on the desired batch weight input device 22 and the symbol B2 represents a desired bale weight as may be manually set at the desired bale weight input device 21. The symbol Nl represents the total number of batches required to deliver a total weight of fiber substantially equal to the desired bale weight, while the symhol NA represents the number of batches which have been previously delivered through the weigh container means in the process of delivering a desired bale weight of fiber. The symbol WT represents total weight actually delivered in a succession of batches, while Q WTOT represents a total of "in-flight" weigh~s computed during processing of a succession of batches. The symbol Wl is employed to repre-sent the predetermined weight of material or fiber to be admitted to the weigh container means 12, as recorded in the predetermined weight memory means 24 and as adjusted during the progress of the program~ The symbol W2 represents the weiyht of material in the weight container means 12 immediately prior to op~nin~ o the outlet 15, as may for example be recorded in the full container memory means 25. The symbol W3 represents the weight of any material or fiber which may be retained in the weight container means 12 after discharge of a batch therefrom, as may be recorded in the empty container memory means 26. The symbol ~ W represents the weight of "in-flight" fiber which is passing in the weigh container 12 immediately after closure o~ the inlet 14 and is subsequently supported by the weigh container means 12 prior to opening of the outlet 15, while the symbol a WA indicates a computed average of a W weights for successive batches.
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As will be apparent to knowledgeable persons from Figure 3 of the accompanying drawings and the above elucidation of the symbols thexe employed, the signal recorded in the predetermined weight memory means 24 may be adjusted duriny processing of each batch in the succession of batches, so that the accumulating total weight of fiber is continually adjusted to approximate an ideal staircase or stepwise increase to the desired total bale weight. An alternative program achieving substantially the same results may defer adjustment of the predetermined weight until the last few or one batch in a succession of batches. A program flow diagram for such an arrangement is indicated in Figure 4, where symbols con-sistent with those described with reference to Figure 3 have been used, with one exception~ The program diagramed in Figure 4 provides for the computation of a weight remaining to complete a desired bale welght, s~mbolized as WREM, which is compared with desired batch weight Wl in determining the program~led adjustment to be made to Wl.
As a further alternative, this invention contemplates that the desired batch weight Wl for a known, predetermined number o~ final batches in a succession may be taken from a manually set input device such as the adjusted weight input device 23. In accordance with such a procedure, program determination that the number of batches delivered was within ZS two (or some other suitable integer) of the number required would be followed by setting Wl to be the manually determined weight rather than a computed weight~ :
It has been determined that a succession of bales produced in accordance with the methods of this invention may be quite closely controlled as to the weight of each bale in the succession, thereby permitting any one bale in the succession , ~ .
3~32 to be subs~ituted for any other one bale in ~arehousing or delivery of fiber. More specifically, a succession of bales ha~ing weights in the range of from about 450 pounds to about 800 pounds may be formed whil~ holding the variation in bale weight of any given bale in the series to the range of from about 1 pound to about 8 pounds above or below the desired bale weight. Thus, the percentage fluctuation experienced will be in the range of no more than three percent of bale weight and preferably about one percent or less.
In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation.
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Claims (27)
1. A process for forming more uniform weight packages of fibrous material comprising supplying a continuing flow of fibrous material, successively accumulating said material into batches having weights which are subject to variance from batch to batch, each batch having a weight which is a fractional portion of a desired package weight, successively releasing the batches of material to a packager, determining the actual weight of each batch delivered to the packager and registering such actual weight while totaling the registered actual weights of the successive batches, adjusting the weight of at least certain batches in the succession based upon the registered actual weights to compensate for any variance in batch weights and thereby more closely control the total weight of material delivered to the packager and facilitate achieving more uniform package weight, and packaging the material which has been delivered to the packager.
2. A process according to Claim 1 wherein the accumulating and then releasing a batch comprises admitting material to a weigh container while signaling the weight of material supported by the container, responding to the signaled weight increasing to a predetermined weight by stopping admission of material to the container, and thereafter opening the container for releasing the batch.
3. A process according to Claim 1 wherein the accumulating and then releasing a batch comprises opening and then closing an inlet to a weigh container and opening and then closing an outlet from the container and further wherein the determining of the delivered weight of the batch comprises signaling the weight of accumulated material supported by the container after the closing of the inlet and before the opening of the outlet, signaling the weight of any material retained in the container after the closing of the outlet and before the opening of the inlet, and responding to the signaling of container and material weights by comparing the signaled weights.
4. A process according to Claim 1 wherein the accumulating and then releasing a batch comprises admitting a predetermined weight of material to a weigh container and further wherein the adjusting of the weight of at least certain batches comprises varying the predetermined weight of material to be admitted to the container as required to achieve a desired total weight of material delivered.
5. A process for forming more uniform weight packages of staple textile fiber comprising cutting filamentary textile tow into staple textile fiber, accumulating fiber into a batch which is a fractional portion of a desired bale weight and then releasing the batch of fiber to a baler, determining the actual weight of the delivered batch after release thereof to the baler and registering the actual weight of the delivered batch, repeating the steps of accumulating and then releasing successive batches as required to deliver a total weight of fiber substantially equal to the desired bale weight while determining and registering the actual weights of the successive batches and all while totaling the registered actual weights of the successive batches, adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to the baler and so as to facilitate achieving more uniform bale weight, and baling the fiber which has been delivered to the baler.
6. A process according to Claim 5 wherein the accumulating and then releasing a batch comprises admitting fiber to a weigh container while signaling the weight of fiber supported by the container, responding to the signaled weight increasing to a predetermined weight by stopping admission of fiber to the con-tainer, and thereafter opening the container for releasing the batch.
7. A process according to Claim 5 wherein the accumulating and then releasing of each batch comprises opening and then closing an inlet to a weigh container and opening and then closing an outlet from the container and further wherein the determining of the delivered weight of the batch comprises signaling the weight of accumulated fiber supported by the container after the closing of the inlet and before the opening of the outlet, signaling the weight of any fiber retained in the container after the closing of the outlet and before the opening of the inlet, and responding to the signaling of container and fiber weights by comparing the signaled weights.
8. A process according to Claim 5 wherein the accumulating and then releasing of each batch comprises admitting a predeter-mined weight of fiber to a weigh container and further wherein the adjusting of the weight of at least certain batches comprises varying the predetermined weight of fiber to be admitted to the container as required to achieve a desired total weight of fiber delivered.
9. A process for forming more uniform weight packages of staple textile fiber comprising cutting filamentary textile tow into staple textile fiber, opening an inlet to a weigh container and ad-mitting fiber thereinto while signaling the weight of fiber supported by the container, responding to the signaled weight increasing to a predetermined weight by closing the inlet and stopping admission of fiber to the container, opening and then closing an outlet from the container for accumulating fiber into a batch which is a fractional portion of a desired bale weight and then releasing the batch of fiber to a baler, signaling the weight of accumulated fiber supported by the container after the closing of the inlet and before the opening of the outlet, signaling the weight of any fiber retained in the container after the closing of the outlet and before the opening of the inlet, determining the actual weight of the delivered batch by comparing the signaled weights and regis-tering the actual weight of the delivered batch, repeating the steps of opening and closing the inlet and outlet as required to deliver successive batches having a total weight of fiber sub-stantially equal to the desired bale weight while determining and registering the actual weights of the successive batches and all while totaling the registered actual weights of the successive batches, varying the predetermined weight of fiber to be admitted to the container in accumulating at least certain batches in the succession for closely controlling the total weight of fiber delivered to the baler and so as to facilitate achieving more uniform bale weight, and baling the fiber which has been del-ivered to the baler.
10. A process for forming more uniform weigh-t packages of staple textile fiber comprising cutting filamentary textile tow into staple textile fiber, opening an inlet to a weigh container and admitting fiber thereinto while electrically signaling the weight of fiber supported by the container, responding to the signaled weight increasing to a predetermined weight by closing the inlet and stopping admission of fiber to the container, opening and then closing an outlet from the container for accumulating fiber into a batch which is a fractional portion of a desired bale weight and then releasing the batch of fiber to a baler, elec-trically signaling the weight of accumulated fiber supported by the container after the closing of the inlet and before the open-ing of the outlet, electrically signaling the weight of any fiber retained in the container after the closing of the outlet and before the opening of the inlet, recording the electrically signaled weights and determining the actual weight of the delivered batch by comparing the recorded signals and recording an electrical signal indicative of the actual weight of the delivered batch, repeating the steps of opening and closing the inlet and outlet as required to deliver successive batches having a total weight of fiber substantially equal to the desired bale weight while de-termining and recording signals indicative of the actual weights of the successive batches and all while totaling the actual weights of the successive batches, varying the predetermined weight of fiber to be admitted to the container in accumulating at least certain batches in the succession for closely controlling the total weight of fiber delivered to the baler and so as to facilitate achieving more uniform bale weight, and baling the fiber which has been delivered to the baler.
11. A process for controlling the weight of fibrous material delivered comprising successively accumulating fibrous material into batches having weights which are subject to variance from batch to batch, each batch having a weight which is a fractional portion of a desired total weight, successively re-leasing the batches of material, determining the actual weight of each batch and registering such actual weight while totaling the registered actual weights of the successive batches, and adjusting the weight of at least certain batches in the succession based upon the registered actual weights to compensate for variance in batch weights and thereby more closely control the total weight of material delivered.
12. A process for controlling the weight of a succession of bales of fibrous material comprising forming a plurality of bales in succession, each bale being formed by accumulating fibrous material into a plurality of successive batches and successively releasing the batches while determining the actual weight of each batch and adjusting the weight of at least certain batches in the succession which form the bale, and controlling any variation in weight from bale to bale in the succession of bales to maintain bale weight within a range of no more than about three percent variance from the desired bale weight.
13. A process according to Claim 12 wherein the step of controlling comprises limiting the variation in weight of successive bales to a range of no more than about one percent of the desired bale weight.
14. A process for controlling the weight of fibrous material delivered comprising opening an inlet to a weigh container and admitting fibrous material thereinto while electrically sig-naling the weight of said material supported by the container, responding to the signaled weight increasing to a predetermined weight by closing the inlet and stopping admission of material to the container, opening and then closing an outlet from the container for accumulating material into a batch which is a fractional portion of a desired total weight and then releasing the batch, electrically signaling the weight of accumulated material supported by the container after the closing of the inlet and before the opening of the outlet, electrically signaling the weight of any material retained in the container after the closing of the outlet and before the opening of the inlet, re-cording the electrically signaled weights and determining the actual weight of the delivered batch by comparing the recorded signals and recording an electrical signal indicative of the actual weight of the delivered batch, repeating the steps of opening and closing the inlet and outlet as required to deliver successive batches having a total weight of material substantially equal to the desired total weight while determining and recording signals indicative of the actual weights of the successive batches and all while totaling the actual weights of the successive batches, and varying the predetermined weight of material to be admitted to the container in accumulating at least certain batches in the succession for closely controlling the total weight of fiber delivered.
15. Apparatus for forming more uniform weight packages of fibrous material and comprising means for supplying fibrous material; packaging means for packaging fibrous material; weigh container means having an inlet and an outlet each with respective means for opening and closing the same and respectively opera-tively communicating with said material supply means and said packaging means for admitting fibrous material from said supply means and for releasing material to be delivered to said pack-aging means in a succession of batches, said weigh container means supporting material as the material is accumulated into batches having weights which are subject to variance from batch to batch, each batch having a weight which is a fractional por-tion of a desired package weight; load cell means operatively connected with said weigh container means for signaling the weight of material supported by said weigh container means; and programmed control means operatively connected with said opening and closing means for controllably actuating said inlet and outlet and with said load cell means for receiving therefrom signals indicative of the weight of material supported by said weigh container means, said control means determining the actual weight of each batch delivered to said packaging means and registering such actual weight while totaling the registered actual weights and adjusting the weight of at least certain batches in the succession to com-pensate for variance in batch weights and thereby more closely control the total weight of material delivered to said packaging means.
16. Apparatus according to Claim 15 wherein said control means comprises full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of material supported immediately before opening of said outlet, empty container memory means responsive to closing of said outlet for recording à load cell signal indicative of any weight of material retained immediately before opening of said inlet, and processing means responsive to signals recorded in said full container and empty container memory means for com-puting the actual weight of a delivered batch.
17. Apparatus according to Claim 15 wherein said control means comprises processing means for monitoring load cell signals and responsive thereto for closing said inlet upon monitored load cell signals indicating that a predetermined weight of material has been accumulated and is being supported by said weigh container means, and further wherein said processing means is responsive to the registering and totaling of actual weights of successive batches for varying said predetermined weight for said at least certain batches.
18. Apparatus according to Claim 15 wherein said control means comprises predetermined weight memory means for recording a signal indicative of a desired batch weight, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of material supported immediately before opening of said outlet, and processing means responsive to signals recorded in said predetermined weight memory means and said full container memory means for computing the weight of material in-flight at the instant of closure of said inlet.
19. Apparatus for forming more uniform weight bales of staple textile fiber and comprising tow cutter means for cutting fila-mentary textile tow into staple textile fiber; baler means for baling fiber; weigh container means having an inlet and an outlet each with respective means for opening and closing the same and respectively operatively communicating with said tow cutter means and said baler means for admitting fiber from said tow cutter means and for releasing fiber to be delivered to said baler means in a succession of batches, said weigh container means supporting fiber as the fiber is accumulated into batches having weights which are subject to variance from batch to batch, each batch having a weight which is a fractional part of a desired bale weight; load cell means operatively connected with said weigh container means for signaling the weight of fiber supported by said weigh container means; and programmed control means operatively connected with said opening and closing means for controllably actuating said inlet and outlet and with said load cell means for receiving therefrom signals indicative of the weight of fiber supported by said weigh container means, said control means determining the actual weight of each batch delivered to said baler means and registering such actual weight of the delivered batch while totaling the registered actual weights and adjusting the weight of at least certain batches in the succession to compensate for variance in batch weights and thereby more closely control the total weight of fiber delivered to said baler means.
20. Apparatus according to Claim 19 wherein said control means comprises full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet, and processing means responsive to signals recorded in said full container and empty container memory means for com-puting the actual weight of the delivered batch.
21. Apparatus according to Claim 19 wherein said control means comprises processing means for monitoring load cell signals and responsive thereto for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, and further wherein said processing means is responsive to the registering and totaling of actual weights of successive batches for varying said predetermined weight for said at least certain batches.
22. Apparatus according to Claim 19 wherein said control means comprises predetermined weight memory means for recording a signal indicative of a desired batch weight, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and processing means responsive to signals recorded in said predetermined weight memory means and said full container memory means for computing the in-flight weight of fiber.
23. Apparatus for forming more uniform weight bales of staple textile fiber and comprising tow cutter means for cutting filamentary textile tow into staple textile fiber; baler means for baling fiber; weigh container means having an inlet and an outlet respectively operatively communicating with said tow cutter means and said baler means for receiving fiber from said tow cutter means and for supporting fiber accumulated into a batch which is a fractional part of a desired bale weight and then releasing the batch of fiber to be delivered to said baler means; load cell means operatively connected with said weigh container means for signaling the weight of fiber supported by said weigh container means; and programmed control means operatively connected with said inlet and outlet and with said load cell means, said control means comprising predetermined weight memory means for recording a signal indicative of a desired batch weight, processing means for monitoring load cell signals and responsive to a comparison thereof with said weight memory means signal for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet; and further wherein said processing means is responsive to signals recorded in said weight memory means and said full container memory means and said empty container memory means for computing the in-flight weight of fiber and the actual weight of a delivered batch after release thereof to said baler means, for registering the in-flight weight and the actual weight of the delivered batch, for opening and closing said inlet and outlet as required to deliver success-ive batches having a total weight of fiber substantially equal to the desired bale weight, for determining and registering the actual weights of the successive batches while totaling the registered actual weights, and for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to said baler means.
24. Apparatus for forming more uniform weight bales of staple textile fiber and comprising tow cutter means for cutting filamentary textile tow into staple textile fiber; baler means for baling fiber; weigh container means having an inlet and an outlet respectively operatively communicating with said tow cutter means and said baler means for receiving fiber from said tow cutter means and for supporting fiber accumulated into a batch which is a fractional part of a desired bale weight and then releasing the batch of fiber to be delivered to said baler means; load cell means operatively connected with said weigh container means for electrically signaling the weight of fiber supported by said weigh container means; and electronic programmed control circuitry means operatively connected with said inlet and outlet and with said load cell means, said control means comprising predetermined weight memory means for recording an electrical signal indicative of a desired batch weight, pro-cessing means for monitoring load cell signals and responsive to a comparison thereof with said weight memory means signal for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet; and further wherein said processing means is responsive to signals recorded in said weight memory means and said full container memory means and said empty container memory means for electrically computing the in-flight weight of fiber and the actual weight of a delivered batch after release thereof to said baler means, for registering the in-flight weight and the actual weight of the delivered batch, for opening and closing said inlet and outlet as required to deliver successive batches having a total weight of fiber substantially equal to the desired bale weight, for determining and registering the actual weights of the successive batches while totaling the registered actual weights, and for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to said baler means.
25. Apparatus for controlling the weight of fibrous material delivered from a means for supplying fibrous material to a receiver means for receiving fibrous material; the apparatus comprising weigh container means having an inlet and an outlet each with respective means for opening and closing the same and respectively operatively communicating with said material supply means and said receiver means for admitting fibrous material from said supply means and for releasing material to be delivered to said receiver means in a succession of batches, said weigh container means supporting material as the material is accumulated into batches having weights which are subject to variance from hatch to batch, each batch having a weight which is a fractional portion of a desired total weight; load cell means operatively connected with said weigh container means for signaling the weight of material supported by said weigh container means; and programmed control means operatively connected with said opening and closing means for controllably actuating said inlet and outlet and with said load cell means for receiving therefrom signals indicative of the weight of material supported by said weigh container means, said control means determining the actual weight of each batch delivered to said packaging means and registering such actual weight while totaling the registered actual weights and adjust-ing the weight of at least certain batches in the succession to compensate for variance in batch weights and thereby more closely control the total weight of material delivered to said receiver means.
26. Apparatus for controlling the weight of staple textile fiber delivered from a means for supplying staple textile fiber to a receiver means for receiving fiber; the apparatus comprising weigh container means having an inlet and an outlet respectively operatively communicating with said supply means and said receiver means for receiving fiber from said supply means and for supporting fiber accumulated into a batch which is a fractional part of a desired total weight and then releasing the batch of fiber to be delivered to said receiver means; load cell means operatively connected with said weigh container means for signaling the weight of fiber supported by said weigh container means; and programmed control means operatively connected with said inlet and outlet and with said load cell means, said control means comprising predetermined weight memory means for recording a signal indicative of a desired batch weight, processing means for monitoring load cell signals and responsive to a comparison thereof with said weight memory means signal for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet; and further wherein said processing means is responsive to signals recorded in said weight memory means and said full container memory means and said empty container memory means for computing the in-flight weight of fiber and the actual weight of a delivered batch after release thereof to said receiver means, for registering the in-flight weight and the actual weight of the delivered batch, for opening and closing said inlet and outlet as required to deliver successive batches having a total weight of fiber substantially equal to the desired total weight, for determining and registering the actual weights of the successive batches while totaling the registered actual weights, and for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to said receiver means.
27. Apparatus for controlling the weight of staple textile fiber delivered from a means for supplying staple textile fiber to a receiver means for receiving fiber; the apparatus comprising weigh container means having an inlet and outlet respectively operatively communicating with said supply means and said receiver means for receiving fiber from said supply means and for supporting fiber accumulated into a batch which is a fractional part of a desired total weight and then releasing the batch of fiber to he delivered to said receiver means; load cell means operatively connected with said weigh container means for electrically signal-ing the weight of fiber supported by said weigh container means;
and electronic programmed control circuitry means operatively connected with said inlet and outlet and with said load cell means, said control means comprising predetermined weight memory means for recording an electrical signal indicative of a desired batch weight, processing means for monitoring load cell signals and responsive to a comparison thereof with said weight memory means signal for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet; and further wherein said processing means is responsive to signals recorded in said weight memory means and said full container memory means and said empty container memory means for electri-cally computing the in-flight weight of fiber and the actual weight of a delivered batch after release thereof to said receiver means, for registering the in-flight weight and the actual weight of the delivered batch, for opening and closing said inlet and outlet as required to deliver successive batches having a total weight of fiber substantially equal to the desired total weight, for determining and registering the actual weights of the successive batches while totaling the registered actual weights, and for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to said receiver means.
and electronic programmed control circuitry means operatively connected with said inlet and outlet and with said load cell means, said control means comprising predetermined weight memory means for recording an electrical signal indicative of a desired batch weight, processing means for monitoring load cell signals and responsive to a comparison thereof with said weight memory means signal for closing said inlet upon monitored load cell signals indicating that a predetermined weight of fiber has been accumulated and is being supported by said weigh container, full container memory means responsive to closing of said inlet for recording a load cell signal indicative of the weight of fiber supported immediately before opening of said outlet, and empty container memory means responsive to closing of said outlet for recording a load cell signal indicative of any weight of fiber retained immediately before opening of said inlet; and further wherein said processing means is responsive to signals recorded in said weight memory means and said full container memory means and said empty container memory means for electri-cally computing the in-flight weight of fiber and the actual weight of a delivered batch after release thereof to said receiver means, for registering the in-flight weight and the actual weight of the delivered batch, for opening and closing said inlet and outlet as required to deliver successive batches having a total weight of fiber substantially equal to the desired total weight, for determining and registering the actual weights of the successive batches while totaling the registered actual weights, and for adjusting the weight of at least certain batches in the succession for closely controlling the total weight of fiber delivered to said receiver means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA316,025A CA1102362A (en) | 1978-11-09 | 1978-11-09 | Method and apparatus for bale weight control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA316,025A CA1102362A (en) | 1978-11-09 | 1978-11-09 | Method and apparatus for bale weight control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1102362A true CA1102362A (en) | 1981-06-02 |
Family
ID=4112927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA316,025A Expired CA1102362A (en) | 1978-11-09 | 1978-11-09 | Method and apparatus for bale weight control |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1102362A (en) |
-
1978
- 1978-11-09 CA CA316,025A patent/CA1102362A/en not_active Expired
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