US20010011451A1 - Method of automatically separating a roving upon removal of a bobbin from a roving frame - Google Patents
Method of automatically separating a roving upon removal of a bobbin from a roving frame Download PDFInfo
- Publication number
- US20010011451A1 US20010011451A1 US09/760,218 US76021801A US2001011451A1 US 20010011451 A1 US20010011451 A1 US 20010011451A1 US 76021801 A US76021801 A US 76021801A US 2001011451 A1 US2001011451 A1 US 2001011451A1
- Authority
- US
- United States
- Prior art keywords
- roving
- bobbin
- pressing finger
- finger bed
- reserve
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
- D01H9/14—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements for preparing machines for doffing of yarns, e.g. raising cops prior to removal
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
- D01H9/16—Yarn-severing arrangements, e.g. for cutting transfer tails; Separating of roving in flyer
Definitions
- My present invention relates to a method for automatically separating or parting a roving upon the removal of a fully wound bobbin from a roving frame, especially a flyer frame in which the roving is delivered to the bobbin by a pressing finger pad on a flyer and the separation or parting of the roving is effected between the pressing finger pad and the bobbin periphery.
- German patent document DE 196 31 756 A1 describes one of the several known techniques for separating or parting the roving between the pressing finger of a flyer and the full roving bobbin.
- a piece of the roving has a relatively high number of rotations per unit length generated therein by an increase in the ratio of the flyer speed to the roving feed rate from the drafting frame in the formation of the last layer of the roving on the bobbin.
- the roving length of greater strength produced by controlling the flyer speed and the delivery rate of the roving from the drafting frame is followed by a reverse rotation of the bobbin to relieve the twist between the pressing finger bed and the bobbin.
- the roving is broken usually at the relaxed location adjacent the pressing finger bed.
- Another object of this invention is to improve the precision of parting of a roving in a flyer frame system for producing full roving bodies whereby the location of the break on the body of the bobbin and the length of roving remaining on the pressing finger bed are both determined with a higher degree of reliability and reproducibility than has hitherto been the case.
- Still another object of the invention is to provide a method of breaking the roving supplied to a bobbin, upon the removal thereof such that a predetermined length of roving remains free on the pressing finger of the flyer.
- This system provides the advantage that the desired weak spot will form with a high degree of reliability over a predetermined segment of the roving and that after the separation an end of the desired length will remain on the pressing finger bed.
- the reserve is formed in turns on the tube above the bobbin winding, i.e. above the upper winding cone.
- the reserve below the fastening turns can be treated as being formed from three segments, namely, a first segment from an upper edge of the upper winding cone to the lower edge thereof at the junction between the upper winding cone and the cylindrical body of the bobbin, a second roving segment from the lower edge of the upper winding cone to the aforementioned weakened points and a third roving segment from the weakened point to the pressing finger bed, whereby this third segment has a length corresponding to the length which is to remain hanging from the pressing finger upon removal of the full bobbin.
- the reverse rotation of the roving bobbin generates a false twist which increases the number of rotations per unit length in the first segment and reduces the number of twists per unit length in the second and third segments.
- the movement of the pressing finger bed to a further point along the body of the bobbin can make the second and third segments of substantially equal length.
- the segment between the break and the finger can be strengthened by increasing the number of twists or rotations per unit length.
- the distance between the two locations along the periphery of the bobbin body through which the pressing finger bed is moved can correspond to the number of rotations or twists per unit length in the segment between the break location and the pressing finger bed.
- the method of automatically parting a roving upon removal of a full roving bobbin from a roving flyer frame in which the roving bobbin is wound on a roving tube with upper and lower winding cones having a wound body between them as the tube is rotated and the roving is delivered by a flyer from a pressing finger bed of the flyer resting on a surface of the wound body of the bobbin comprises:
- FIGS. 1 - 4 are diagrammatic side elevational views of a roving bobbin in various phases for the automatic parting of the roving at a particular region.
- FIGS. 1 - 4 a bobbin-forming station of a roving frame has been shown in schematic side view with the flyer shown only in the form of its pressing finger bed 10 .
- the bobbin 1 is wound upon a bobbin core or tube 3 which is mounted on the spindle.
- the roving 2 is fed through the flyer rail and flyer from the drafting frame to the pressing finger bed 10 and is wound on the bobbin tube 3 to form the bobbin 1 which has a cylindrical body 15 between upper and lower winding cones 12 and 13 .
- the length of the roving reserve is represented at A-D in FIG. 1 and can be seen as comprising three segments.
- a first roving segment extends from the upper edge A to the lower edge B of the upper winding cone 12 .
- a second roving segment extends from point B to a point or region C at which location a weak spot is to be generated.
- the third segment extends from point C to a point D, the stretch between point C and D having a length (C-D) which corresponds to the length of the segment which is to remain hanging from the pressing finger bed 10 .
- the roving reserve A-D is partly unwound by a reverse rotation of the bobbin 1 and a lowering of the pressing finger bed 10 along the bobbin axis.
- the roving 2 partly unrolls along the lower edge B of the upper winding cone 12 to generate a false twist in the roving A-D which increases the twist per unit length in segment A-B and reduces the twist in the segment B-D.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
A full bobbin before removal from a roving machine has a roving broken between the bobbin body and the pressing finger bed of the flyer by initially winding the roving around the tube above the upper cone and then generating a roving reserve from at least half a turn on the upper winding cone and the body. The roving reserve between the fastening turns and the pressing finger bed is then partly unwound to form a weak spot along the roving reserve and the pressing finger bed is then moved a certain amount along the bobbin periphery and the roving is broken at the weak spot by a further movement of the pressing finger bed.
Description
- My present invention relates to a method for automatically separating or parting a roving upon the removal of a fully wound bobbin from a roving frame, especially a flyer frame in which the roving is delivered to the bobbin by a pressing finger pad on a flyer and the separation or parting of the roving is effected between the pressing finger pad and the bobbin periphery.
- There are numerous techniques which have been developed for the parting of the roving between the pressing finger of a flyer of a roving frame and full roving bobbin. During the winding of the bobbin, the bobbin core or tube on the spindle is rotated and the roving is fed, usually from a drafting frame through the flyer and a pressing finger on the flyer to the pressing finger tube or bed at the tip or free end of the pressing finger, from which the roving is delivered to the tube and is wound up in a bobbin. The relative axial movement of the flyer and the spindle build a generally cylindrical body of winding in the bobbin which is flanked between conical windings at the upper and lower ends thereof.
- German patent document DE 196 31 756 A1 describes one of the several known techniques for separating or parting the roving between the pressing finger of a flyer and the full roving bobbin. In this system, a piece of the roving has a relatively high number of rotations per unit length generated therein by an increase in the ratio of the flyer speed to the roving feed rate from the drafting frame in the formation of the last layer of the roving on the bobbin. The roving length of greater strength produced by controlling the flyer speed and the delivery rate of the roving from the drafting frame is followed by a reverse rotation of the bobbin to relieve the twist between the pressing finger bed and the bobbin. Whereupon, by lowering of the bobbin carriage into the bobbin removal position, the roving is broken usually at the relaxed location adjacent the pressing finger bed.
- The drawback of this approach is that the location of the break in the roving on the bobbin body is not fixed and varies widely from bobbin to bobbin. Furthermore, the length of roving and hanging from the pressing finger bed also may vary widely from case to case. This lack of relatively precise break locations from bobbin to bobbin and station to station constitutes a significant drawback in the handling of the bobbin subsequently and in the winding of new bobbins on empty tubes.
- It is, therefore, the principal object of the present invention to provide an improved method of breaking a roving between the pressing finger bed and the fully wound bobbin whereby the aforementioned drawbacks are avoided.
- Another object of this invention is to improve the precision of parting of a roving in a flyer frame system for producing full roving bodies whereby the location of the break on the body of the bobbin and the length of roving remaining on the pressing finger bed are both determined with a higher degree of reliability and reproducibility than has hitherto been the case.
- Still another object of the invention is to provide a method of breaking the roving supplied to a bobbin, upon the removal thereof such that a predetermined length of roving remains free on the pressing finger of the flyer.
- These objects are attained, in accordance with the invention by first generating at least a half turn of the roving and a roving reserve above the bobbin, then unwinding the roving reserve by rotating the bobbin backwardly simultaneously with a vertical movement of the pressing finger bed along the bobbin axis to generate a weakened spot along the roving leading from the pressing finger bed by partial untwisting, then moving the pressing finger bed by a certain amount along the periphery of the bobbin, and drawing the roving taut and parting the roving in the region of the weak spot by movement of the pressing finger bed.
- This system provides the advantage that the desired weak spot will form with a high degree of reliability over a predetermined segment of the roving and that after the separation an end of the desired length will remain on the pressing finger bed.
- According to a feature of the invention, the reserve is formed in turns on the tube above the bobbin winding, i.e. above the upper winding cone. The reserve below the fastening turns can be treated as being formed from three segments, namely, a first segment from an upper edge of the upper winding cone to the lower edge thereof at the junction between the upper winding cone and the cylindrical body of the bobbin, a second roving segment from the lower edge of the upper winding cone to the aforementioned weakened points and a third roving segment from the weakened point to the pressing finger bed, whereby this third segment has a length corresponding to the length which is to remain hanging from the pressing finger upon removal of the full bobbin.
- The reverse rotation of the roving bobbin generates a false twist which increases the number of rotations per unit length in the first segment and reduces the number of twists per unit length in the second and third segments. The movement of the pressing finger bed to a further point along the body of the bobbin can make the second and third segments of substantially equal length. The segment between the break and the finger can be strengthened by increasing the number of twists or rotations per unit length. The distance between the two locations along the periphery of the bobbin body through which the pressing finger bed is moved can correspond to the number of rotations or twists per unit length in the segment between the break location and the pressing finger bed. Finally the movement of the pressing finger bed in the same direction to a further location along the body of the bobbin effects the separation.
- More particularly, the method of automatically parting a roving upon removal of a full roving bobbin from a roving flyer frame in which the roving bobbin is wound on a roving tube with upper and lower winding cones having a wound body between them as the tube is rotated and the roving is delivered by a flyer from a pressing finger bed of the flyer resting on a surface of the wound body of the bobbin comprises:
- (a) generating at least half a turn of roving and a roving reserve above the bobbin by a forward rotation of the bobbin following completion of the bobbin and while retaining the roving with the pressing finger bed;
- (b) unwinding the roving reserve by a reverse rotation of the bobbin to form a weakened location along the roving at a certain distance from the pressing finger bed;
- (c) moving the pressing finger bed by a predetermined amount along a periphery of the bobbin; and
- (d) pulling on the roving by movement of the pressing finger bed, thereby parting the roving at the location.
- The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
- FIGS.1-4 are diagrammatic side elevational views of a roving bobbin in various phases for the automatic parting of the roving at a particular region.
- In FIGS.1-4 a bobbin-forming station of a roving frame has been shown in schematic side view with the flyer shown only in the form of its
pressing finger bed 10. The bobbin 1 is wound upon a bobbin core ortube 3 which is mounted on the spindle. Theroving 2 is fed through the flyer rail and flyer from the drafting frame to the pressingfinger bed 10 and is wound on thebobbin tube 3 to form the bobbin 1 which has acylindrical body 15 between upper and lowerwinding cones - After the bobbin1 has reached its fully wound state, above the bobbin on the
tube 3 and thus above the upper windingcone 12, two turns are wound for fixing the winding and forming a roving reserve. The length of the roving reserve is represented at A-D in FIG. 1 and can be seen as comprising three segments. A first roving segment extends from the upper edge A to the lower edge B of the upper windingcone 12. A second roving segment extends from point B to a point or region C at which location a weak spot is to be generated. The third segment extends from point C to a point D, the stretch between point C and D having a length (C-D) which corresponds to the length of the segment which is to remain hanging from thepressing finger bed 10. - In a second stage of the process, represented in FIG. 2, the roving reserve A-D is partly unwound by a reverse rotation of the bobbin1 and a lowering of the pressing
finger bed 10 along the bobbin axis. During this unwinding operation coupled with the downward movement of the pressing finger bed, theroving 2 partly unrolls along the lower edge B of the upperwinding cone 12 to generate a false twist in the roving A-D which increases the twist per unit length in segment A-B and reduces the twist in the segment B-D. - From FIG. 2 it is also apparent that in a third step the
pressing finger bed 10 is moved to a location E such that the stretches B-D and B-E are of equal length. The roving thus rolls between thepressing finger bed 10 and the bobbin 1. As a consequence of the false twist, a weak spot is generated at C while the twist count increases per unit length in the region between the point C and the point E so there the roving is strengthened. From FIG. 3 it will be apparent that the length of the stretch D-E is selected so that there is a sufficient number of twists per unit length in the segment E-C. - From FIGS. 3 and 4 it will be apparent that in the next stage the
pressing finger 10 is moved to the point F, i.e. beyond the point E and thence to a lower point (compare FIGS. 3 and 4) so that the roving will break exactly in the weak region C. With the system of the invention, the breakage of the roving occurs with high reliability at the location C and the length of the segment C-D which remains on thepressing finger bed 10 likewise is consistent from bobbin to bobbin. The bobbin may then be removed by any conventional doffing system and the bobbins delivered to the spinning machine will also have their free ends consistently located.
Claims (8)
1. A method of automatically parting a roving upon removal of a full roving bobbin from a roving flyer frame in which the roving bobbin is wound on a roving tube with upper and lower winding cones having a wound body between them as the tube is rotated and the roving is delivered by a flyer from a pressing finger bed of the flyer resting on a surface of the wound body of the bobbin, said method comprising the steps of:
(a) generating at least half a turn of roving and a roving reserve above the bobbin by a forward rotation of the bobbin following completion of the bobbin and while retaining the roving with said pressing finger bed;
(b) unwinding the roving reserve by a reverse rotation of said bobbin to form a weakened location along said roving at a certain distance from said pressing finger bed;
(c) moving the pressing finger bed by a predetermined amount along a periphery of the bobbin; and
(d) pulling on said roving by movement of said pressing finger bed, thereby parting said roving at said location.
2. The method defined in wherein said half turn of roving and said roving reserve are wound on said tube above said upper winding cone.
claim 1
3. The method defined in wherein the roving reserve has three segments including
claim 2
a first segment extending from an upper edge (A) of the upper winding cone to a lower edge (B) of the upper winding cone,
a second segment extending from the lower edge (B) of the upper winding cone to said location (C), and
a third segment extending from said location (C) to a point (D) and corresponding in length to a desired length of roving remaining on said pressing finger after removal of the bobbin.
4. The method defined in wherein a false twist is produced by the reverse rotation of the bobbin whereby a number of twists per unit length is increased in said first segment and is reduced in said second and third segments.
claim 3
5. The method defined in wherein said pressing finger bed is moved from point (D) to a point (E) such that the distances (B-D) and (B-E) are equal.
claim 4
6. The method defined in , further comprising strengthening said third segment by increasing a number of twists thereof.
claim 5
7. The method defined in wherein the distance (D-E) is selected in correspondence with the twists per unit length provided in the third segment.
claim 5
8. The method defined in wherein said roving is parted at said location by moving said pressing finger bed to a further point (F) on the bobbin.
claim 5
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10001351.1 | 2000-01-14 | ||
DE10001351 | 2000-01-14 | ||
DE10001351A DE10001351A1 (en) | 2000-01-14 | 2000-01-14 | Automatic severing of the roving when the wound bobbin is doffed from a roving frame uses a press finger plank with a structured movement to act on the weak point of set roving reserves to give a constant remaining length |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010011451A1 true US20010011451A1 (en) | 2001-08-09 |
US6418705B2 US6418705B2 (en) | 2002-07-16 |
Family
ID=7627524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/760,218 Expired - Fee Related US6418705B2 (en) | 2000-01-14 | 2001-01-11 | Method of automatically separating a roving upon removal of a bobbin from a roving frame |
Country Status (4)
Country | Link |
---|---|
US (1) | US6418705B2 (en) |
EP (1) | EP1123996B1 (en) |
JP (1) | JP2001226837A (en) |
DE (2) | DE10001351A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080127624A1 (en) * | 2006-12-04 | 2008-06-05 | Brunk Kenneth D | Flyer and spindle brake assembly for handspinning wheels |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114717694B (en) * | 2022-03-29 | 2024-01-26 | 颍上鑫鸿纺织科技有限公司 | A device is decided to cotton yarn strip for cotton yarn processing |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE554010A (en) | ||||
DE3509338A1 (en) | 1985-03-15 | 1986-09-18 | Fritz 7347 Bad Überkingen Stahlecker | MAINTENANCE DEVICE MOVABLE ALONG A SPINNING MACHINE WITH A FLUSH COLLAR NEEDLE |
DE3931124A1 (en) * | 1989-09-18 | 1991-03-28 | Zinser Textilmaschinen Gmbh | METHOD AND DEVICE FOR SEPARATING A PRE-YARN BETWEEN THE PRESSING FINGERS ON THE LEAF OF A PRE-STRINGING MACHINE PROVIDED WITH A STRETCHER AND THE FULL PRE-YARN SPOOLS |
DE4122810A1 (en) * | 1991-07-10 | 1993-01-14 | Zinser Textilmaschinen Gmbh | METHOD FOR SEPARATING THE RUNS OF PRE-YARN BOBS MADE ON RASPING MACHINES |
US5524428A (en) * | 1994-07-05 | 1996-06-11 | Fratelli Marzoli & C. S.P.A. | Method and apparatus for separating the roving wound on packages from the flyers of a roving frame or the like, and for securing the roving end to the packages before doffing |
FR2722513B1 (en) * | 1994-07-13 | 1996-08-30 | Schlumberger Et Cie Sa N | PROCESS FOR BREAKING THE WICK FOR AUTOMATIC LIFTING OF THE COILS ON SPINDLE BENCHES AND PRESSING FINGER IMPLEMENTED BY THIS PROCESS |
DE19512578C2 (en) * | 1995-04-03 | 1997-04-17 | Grosenhainer Textilmaschbau | Process for separating roving sliver before removing bobbins on roving machines |
DE19631756A1 (en) * | 1996-08-06 | 1998-02-12 | Zinser Textilmaschinen Gmbh | Severing of sliver at bobbin changing on roving frame |
DE19733614A1 (en) | 1996-09-03 | 1998-04-23 | Rieter Ag Maschf | More efficient multi=use suction tube for a roving drafting frame |
-
2000
- 2000-01-14 DE DE10001351A patent/DE10001351A1/en not_active Withdrawn
-
2001
- 2001-01-10 JP JP2001002917A patent/JP2001226837A/en not_active Withdrawn
- 2001-01-11 US US09/760,218 patent/US6418705B2/en not_active Expired - Fee Related
- 2001-01-11 DE DE50101157T patent/DE50101157D1/en not_active Expired - Lifetime
- 2001-01-11 EP EP01100618A patent/EP1123996B1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080127624A1 (en) * | 2006-12-04 | 2008-06-05 | Brunk Kenneth D | Flyer and spindle brake assembly for handspinning wheels |
US7472537B2 (en) | 2006-12-04 | 2009-01-06 | Brunk Kenneth D | Flyer and spindle brake assembly for handspinning wheels |
Also Published As
Publication number | Publication date |
---|---|
JP2001226837A (en) | 2001-08-21 |
DE50101157D1 (en) | 2004-01-29 |
EP1123996B1 (en) | 2003-12-17 |
EP1123996A1 (en) | 2001-08-16 |
DE10001351A1 (en) | 2001-07-19 |
US6418705B2 (en) | 2002-07-16 |
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Owner name: ZINSER TEXTILMASCHINEN GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MACHNIK, FRANZ;REEL/FRAME:011596/0256 Effective date: 20010216 |
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STCH | Information on status: patent discontinuation |
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