CN106757589A - A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula - Google Patents
A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula Download PDFInfo
- Publication number
- CN106757589A CN106757589A CN201611143430.4A CN201611143430A CN106757589A CN 106757589 A CN106757589 A CN 106757589A CN 201611143430 A CN201611143430 A CN 201611143430A CN 106757589 A CN106757589 A CN 106757589A
- Authority
- CN
- China
- Prior art keywords
- yarn
- shell fragment
- looping
- heater
- filoplume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/28—Heating or cooling arrangements for yarns
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/10—Tension devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The present invention relates to a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula, belong to technical field of textile processing.The present invention uses and shell fragment is set below heater, shell fragment walks to be formed between yarn section plane and heater working face elasticity gripping passage, elastic held looping is implemented to sliver filoplume, increase filoplume looping amount and looping tightness, acted on by shell fragment flexible adjustment, meet sliver different thicknesses, the requirement of the filoplume looping of quantity, it is to avoid twist with the fingers resistance and uprush and cause Yarn break；Apparatus of the present invention only need sliver gently to contact heater working face, two-sided curable grip just can be formed to tighten control sliver filoplume looping amount and looping tightness, breakage is avoided, the paradox technological deficiency that weight yarn tightness looping filoplume high reduces Yarn break with light pressure yarn is eliminated.The present invention is rational in infrastructure, easy to operate, it is easy to promote the use of.
Description
Technical field
The present invention relates to a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula, belong to technical field of textile processing.
Background technology
Filoplume is one of important indicator of measurement yarn qualities.Yarn filoplume not only influences the rear operation such as woven, knitting
Production efficiency, and influence final products presentation quality, particularly high speed shuttleless loom commonly used today, reduce yarn
Filoplume tool is of great significance.Because filoplume results from spinning process, it is to reduce the base of filoplume to reduce fuzzy yarn
Plinth and key.
Yarn filoplume results from the spun yarn manufacturing procedure of ring spinning.The spinning process key issue of common ring spinning exists
In：Fiber strip pressure holding is in flat belt-like by front roller nip, under twisting twisting resistance effect, in flat belt-like fiber strip
There is inside and outside transfer in fiber, when fiber a part comes into yarn body by inside and outside transfer, now the fiber exposes the head of yarn body
After end is partially disengaged front roller nip gripping effect, it is impossible to be again introduced into or be wrapped on yarn body trunk, then form filoplume.In
A kind of Department of Intellectual Property of state 2007 year 07 month invention disclosed patent " flatiron Yarn spinning method of improvement yarn property " on the 11st, patent
Numbers 200610166509.9；Department of Intellectual Property of the U.S. on June 30th, 2009 open patent of invention " Method and apparatus
For producing high quality yarn on a ring-spinning machine ", patent publication No.
7552580B2.This two application complicated legal cases together provide one kind can be heated to improve into fiber in spinning triangular zone
The flatiron Yarn spinning method of yarn quality；Specifically, there is provided the fiber particularly twist triangle zone in a kind of yarn to institute
In fiber press the submissive bright and clean spinning apparatus for the treatment of, can greatly reduce Yarn filoplume, reduce spun yarn moment of torsion, improve
Yarn qualities.Either side-mounted, underneath type or the submissive bright and clean spinning apparatus of overhead at present, common feature be only with
The flatiron work of single ironing apparatus is processed in face of sliver.Because in spinning process, spinning section sliver not only produces gas
Circle is rocked, and sliver is lifted with twizzle and constantly changes height and angle so that sliver clean spinned whole flatiron formula is soft
Cheng Zhong, the flatiron working face contact with ironing apparatus is not tight, uneven consistent, causes spun yarn finish coefficient of variation
Greatly, product quality uniformity is poor.And the flatiron work of single ironing apparatus is processed in face of sliver, Yarn filoplume is reduced
Winding tightness not enough, easily largely rebounded in follow-up winding procedure process, it is impossible to veritably meet bright yarn high
Production requirement.
China Intellectual Property Office 2016 year 08 month invention disclosed patent on the 03rd is " for the press-down type pressure of submissive bright and clean spinning
Sheet devices ", the patent No. 201510883443.4, this application complicated legal case discloses one kind and is made up of housing, heating ceramic piece, heater
Press-down type electric ceramic sheet devices, the soft clean spinning apparatus make pottery as above-mentioned ironing apparatus only with single high temperature
Porcelain working face is processed sliver, refractory ceramics working face and yarn pressure holding great efforts, and yarn winding tightness is big, but is twisted with the fingers and fallen into play
Increase, end breakage rate increase；Reduce and twist with the fingers the effect of falling into, refractory ceramics working face is small with yarn pressure holding dynamics, closeness of contact is not enough,
Yarn winding tightness is small；And the device is also rocked periodicity sliver tension force and the position come with twizzle lift band by spinning section air ring
Change is put, sliver contacts tightness cyclically-varying with refractory ceramics working face, causes spun yarn finish coefficient of variation big,
Product quality uniformity is poor.For the problem, " one kind is about for China Intellectual Property Office 2016 year 03 month invention disclosed patent on the 16th
The submissive bright and clean spinning apparatus of beam formula ", the patent No. 201510927279.2, this application complicated legal case provides one kind and has used constraining rod
Sliver is carried out spacing, it is ensured that sliver is close to the flatiron working face of heater all the time, solve original spinning quality discrepancy big
Problem.But above-mentioned submissive bright and clean spinning apparatus are all fixed non-elastic components, it is impossible to realize the table to processing section sliver
Filoplume is exposed in face carries out elastic pressure holding looping, lacks flexible adjustment function, result in following paradox technical barrier：Single high temperature
Ceramic working face or single refractory ceramics working face are used in series with constraining rod, big to sliver contact tightness, and the looping of sliver is tight
Degree is big, and Yarn filoplume bounce-back is few after winder, and spinning is twisted with the fingers to fall into and increased, and end breakage rate increases；It is small to sliver contact tightness, spinning
Twisting with the fingers to fall into is reduced, and end breakage rate is reduced, but the looping tightness of sliver is low, and Yarn filoplume bounce-back is more after winder, generates " heating dress
Put working face weight yarn tightness filoplume looping high and light pressure yarn reduce Yarn break " paradox technological deficiency.
The content of the invention
There is problem for above-mentioned, it is an object of the invention to provide a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula,
To achieve these goals, technical solution of the invention is：
A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula, including by heater, adiabatic protecting cover, linking arm, pedestal group
Into submissive bright and clean spinning apparatus, shell fragment is set below the heater of submissive bright and clean spinning apparatus, one end of shell fragment is to walk
Yarn section, it is plane to walk yarn section, and the other end of shell fragment is stretch section, and stretch section both sides are symmetrically provided with flexible adjustment groove, submissive
The side wall of bright and clean spinning apparatus pedestal is provided with shell fragment deck, and the stretch section bottom of shell fragment is inserted in shell fragment deck, and shell fragment is walked
Yarn section is movably placed in heater lower section, and the plane for walking yarn section is parallel with heater working face.
Shell fragment walks the distance between yarn section plane and heater working face for 0.3-1.2 millimeters.
Shell fragment thickness is 0.1-0.2 millimeters.
As a result of above technical scheme, compared with prior art, the elastic submissive bright and clean spinning of pressure holding formula of the invention
Device, the advantage is that：The present invention walks yarn section plane parallel to heater using shell fragment, shell fragment is set below heater
Working face, shell fragment walks to be formed between yarn section plane and heater working face elasticity gripping passage, to equivalent count fineness
Sliver surface hairiness implement elastic held, collaboration with coordinate that the working face of heater is static to be gripped, strengthen sliver surface hair
Plumage looping curable grip, increases looping amount and looping tightness of the filoplume on yarn body trunk, by shell fragment flexible adjustment sliver surface
Filoplume looping curable grip, meets sliver different thicknesses, the requirement of the filoplume looping of quantity, it is to avoid twist with the fingers resistance and uprush and cause yarn to break
Head；Apparatus of the present invention elastic piece structure is designed to meet sliver and gently contacts heater working face, just can form two-sided curable grip
Enhancing sliver surface hairiness looping amount and looping tightness, are greatly reduced breakage, so as to eliminate toward submissive bright and clean spinning dress
Put the paradox technological deficiency that heater working face weight yarn tightness looping filoplume high reduces Yarn break with light pressure yarn.This hair
It is bright rational in infrastructure, it is easy to operate, it is easy to which that spread is used.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is looming draft of the invention.
Specific embodiment
A kind of elastic submissive bright and clean spinning apparatus of pressure holding formula of the invention are described in further detail below in conjunction with the accompanying drawings.
See accompanying drawing.
All it is for the existing single flatiron submissive bright and clean spinning apparatus of working face and the submissive bright and clean spinning apparatus of constraint formula
Fixed non-elastic component, it is impossible to implement elastic pressure holding looping to yam surface filoplume, it is impossible to which it is tight to reconcile breakage, filoplume looping
The technological deficiency of contradiction between degree, the present invention provides a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula, and the device is by adding
Thermal 6, adiabatic protecting cover 2, linking arm 1, the Chinese Patent Application No. of the composition of pedestal 5 are 201510883443.4, denomination of invention
To be improved on the basis of " for the press-down type preforming device of submissive bright and clean spinning ", the present invention is using " for submissive bright and clean spinning
The lower section of heater 6 of the press-down type preforming device of yarn " sets shell fragment 3, and one end of shell fragment 3 is to walk yarn section, and it is plane to walk yarn section
Shape, it is 0.3-1.2 millimeter that shell fragment 3 walks the distance between yarn section plane and the working face of heater 6, shell fragment 3 walk yarn section plane and
Elasticity is formed between the working face of heater 7 and grips passage, institute's yarn number is higher, yarn diameter is thinner, and shell fragment 3 is walked
Yarn section plane is smaller with the distance between the working face of heater 6, and institute's yarn number is lower, yarn diameter is thicker, and shell fragment 3 is walked
Yarn section plane is bigger with the distance between the working face of heater 6；The other end of shell fragment 3 is stretch section, and stretch section both sides are symmetrical
Flexible adjustment groove is provided with, institute's yarn number is higher, yarn diameter is smaller, larger flexible adjustment groove, material identical need to be configured
The elastic force of shell fragment 3 is smaller, and the lower, yarn diameter of branch of spinning is thicker, need to configure less property regulating tank, material identical shell fragment 3
Elastic force is bigger；Shell fragment deck 4 is provided with the side wall of pedestal 5, the stretch section bottom of shell fragment 3 is inserted in shell fragment deck 4, shell fragment
3 walk yarn section is movably placed in the lower section of heater 6, and the plane for walking yarn section is parallel with the working face of heater 6, and the thickness of shell fragment 3 is
0.1-0.2 millimeters, shell fragment 3 is spring steel.It is provided with lead in pedestal 5, lead one end external power supply, the lead other end is through support arm
Electric heater unit in 1 internal switching heater 6 so that the flatiron work face of heater 6 has 80-150 DEG C of temperature.
It is 50/50 ramie/cotton rove to use blending ratio, spins 60 English branch spun yarns, and the thickness of shell fragment 3 is 0.1 millimeter, shell fragment
3 materials are spring steel, and shell fragment 3 is walked into the distance between yarn section front plan and the working face of heater 6 is set to 0.5 millimeter,
The work face pressure yarn depth of heater 6 is 0.8 millimeter；By feeding loudspeaker into the drafting system of ring throstle, warp
After drafting system drawing-off, from the front roller nip output being made up of preceding rubber roll, front roller, front roller nip output fiber yarn exists
Twisting and while wind under effect, formed while rotation, while the sliver that moves ahead, it is submissive bright and clean that moment enters elasticity pressure holding centralization type
The working face and shell fragment 3 of the heater 7 of spinning apparatus are walked between the front plan of yarn section, high in the working face of heater 7
Under warm flatiron effect, the surface exposed filoplume of sliver obtains softening treatment, the filoplume after softening under sliver high speed rotation effect,
The working face static gripping force and shell fragment 3 of heated device 7 walk the common work of the front plan elastic grip holding force of yarn section simultaneously
With when one section of sliver filoplume is more more long, sliver surface volume is larger, although shell fragment 3 can be bounced off the work of heater 7
Face, forms relatively large distance, but the curable grip of filoplume is strengthened, and filoplume is held the degree that is wrapped on sliver trunk and tightness adds
By force, to meet the requirement of more filoplume looping more long, and to the press force reduction of yarn trunk, it is to avoid twist with the fingers resistance and uprush and cause yarn
Line breaks end；When one section of sliver filoplume is less shorter, shell fragment 3 returns to the work apart from heater 7 to the curable grip of filoplume
Face small distance, the requirement of looping is gripped to meet compared with undercoat plumage by effective elasticity, realizes the effective looping of sliver surface hairiness；From
The working face and shell fragment 3 of heater 6 walk yarn section front plan between export sliver, through twizzle, rings, wire loop,
Finally it is wound up on spool.Drawn through experiment test contrast：Using the elasticity pressure holding submissive bright and clean spinning apparatus of centralization type of the invention
Compared with the former soft clean spinning cop of correspondence, 3 millimeters of hairiness indexs reduce by 77.1% to the 60 English branch ramie/cotton cops for being spinned；Winder
Compared with the former soft clean spinning cylinder yarn of correspondence, 3 millimeters of hairiness indexs improve 54.2% to 60 English branch ramie/cottons cylinder yarn afterwards；Due to the present invention
When device is used, larger pressure yarn depth (more than 2.5 millimeters) of the coal face configuration of heater 6 is not required to, as long as sliver is gently contacted
The working face of heater 6, is achieved that the effective tight looping treatment of sliver surface hairiness, and breakage is greatly reduced, and eliminates
Conventional submissive bright and clean spinning apparatus heater 6 working face weight yarn tightness looping filoplume high and light pressure yarn reduce Yarn break
Paradox technological deficiency.
Claims (3)
1. a kind of submissive bright and clean spinning apparatus of elastic pressure holding formula, including by heater (6), adiabatic protecting cover (2), linking arm (1),
The submissive bright and clean spinning apparatus of pedestal (5) composition, it is characterised in that：In heater (6) lower section of submissive bright and clean spinning apparatus
Shell fragment (3) is set, and one end of shell fragment (3) is to walk yarn section, it is plane to walk yarn section, and the other end of shell fragment (3) is stretch section, elasticity
Section both sides are symmetrically provided with flexible adjustment groove, and shell fragment deck (4), bullet are provided with the side wall of submissive bright and clean spinning apparatus pedestal (5)
The stretch section bottom of piece (3) is inserted in shell fragment deck (4), and shell fragment (3) walks yarn section and is movably placed in heater (6) lower section, walks
The plane of yarn section is parallel with heater (6) working face.
2. a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula as claimed in claim 1, it is characterised in that：Described shell fragment
(3) the distance between yarn section plane and heater (6) working face are walked for 0.3-1.2 millimeters.
3. a kind of elastic submissive bright and clean spinning apparatus of pressure holding formula as claimed in claim 1, it is characterised in that：Described shell fragment
(3) thickness is 0.1-0.2 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143430.4A CN106757589B (en) | 2016-12-13 | 2016-12-13 | A kind of submissive bright and clean spinning apparatus of elasticity pressure holding formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143430.4A CN106757589B (en) | 2016-12-13 | 2016-12-13 | A kind of submissive bright and clean spinning apparatus of elasticity pressure holding formula |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106757589A true CN106757589A (en) | 2017-05-31 |
| CN106757589B CN106757589B (en) | 2019-03-08 |
Family
ID=58880575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611143430.4A Active CN106757589B (en) | 2016-12-13 | 2016-12-13 | A kind of submissive bright and clean spinning apparatus of elasticity pressure holding formula |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106757589B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817878A1 (en) * | 2000-12-12 | 2002-06-14 | Schlumberger Cie N | Assembly to reduce hairiness in spun yarn has a wetting unit, downstream of the drawing unit and upstream of the yarn guide, to impregnate the yarn material with water |
| JP2003268638A (en) * | 2002-03-13 | 2003-09-25 | Kanai Hiroaki | Fluff lying down tool and fluff lying down device for ring frames, and method for lying down fluff in ring frames |
| JP2004115987A (en) * | 2002-09-30 | 2004-04-15 | Kanai Hiroaki | Fluff binding tool for ring spinning frame and fluff binding unit |
| CN1908263A (en) * | 2006-08-17 | 2007-02-07 | 朱爱萍 | Resilient plate type stereo compact spinning device for spinning machine |
| CN1995510A (en) * | 2006-12-28 | 2007-07-11 | 武汉科技学院 | Pressing and spinning method for improving yarn performance |
| CN201850363U (en) * | 2010-07-27 | 2011-06-01 | 武汉纺织大学 | Synchronous transverse-movement side type softening spinning device |
| CN103485008A (en) * | 2013-09-29 | 2014-01-01 | 江南大学 | Wet and hot spinning device capable of reducing resultant yarn hairiness |
| CN105316822A (en) * | 2015-12-07 | 2016-02-10 | 经纬纺织机械股份有限公司 | Downwards-pressing pressing piece device for smooth and clean spinning |
| CN206279296U (en) * | 2016-12-13 | 2017-06-27 | 武汉纺织大学 | A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula |
-
2016
- 2016-12-13 CN CN201611143430.4A patent/CN106757589B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817878A1 (en) * | 2000-12-12 | 2002-06-14 | Schlumberger Cie N | Assembly to reduce hairiness in spun yarn has a wetting unit, downstream of the drawing unit and upstream of the yarn guide, to impregnate the yarn material with water |
| JP2003268638A (en) * | 2002-03-13 | 2003-09-25 | Kanai Hiroaki | Fluff lying down tool and fluff lying down device for ring frames, and method for lying down fluff in ring frames |
| JP2004115987A (en) * | 2002-09-30 | 2004-04-15 | Kanai Hiroaki | Fluff binding tool for ring spinning frame and fluff binding unit |
| CN1908263A (en) * | 2006-08-17 | 2007-02-07 | 朱爱萍 | Resilient plate type stereo compact spinning device for spinning machine |
| CN1995510A (en) * | 2006-12-28 | 2007-07-11 | 武汉科技学院 | Pressing and spinning method for improving yarn performance |
| CN201850363U (en) * | 2010-07-27 | 2011-06-01 | 武汉纺织大学 | Synchronous transverse-movement side type softening spinning device |
| CN103485008A (en) * | 2013-09-29 | 2014-01-01 | 江南大学 | Wet and hot spinning device capable of reducing resultant yarn hairiness |
| CN105316822A (en) * | 2015-12-07 | 2016-02-10 | 经纬纺织机械股份有限公司 | Downwards-pressing pressing piece device for smooth and clean spinning |
| CN206279296U (en) * | 2016-12-13 | 2017-06-27 | 武汉纺织大学 | A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106757589B (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108823718B (en) | Production method of graphene modified fiber core-spun elastic yarn and elastic fabric | |
| CN106337229B (en) | The method of nano electrostatic spinning resultant yarn integrated with staple fiber ring spinning | |
| CN106987943B (en) | A kind of ring spinner reducing filoplume using single ingot atomization wetting apparatus | |
| CN105755622B (en) | A kind of rove method AB yarn production technologies | |
| CN103981612B (en) | A kind of AB ring composite yarn and production method thereof | |
| CN107460612A (en) | A kind of colorful gradient number yarn knitting fabric and preparation method thereof | |
| CN111455519A (en) | Processing technology of semi-worsted plush core-spun yarn | |
| CN110016742A (en) | A kind of high-efficiency method for producing of pure cotton combed high grade cotton yarn | |
| CN104018264B (en) | A kind of color cotton cotton core covering yarn and processing method | |
| CN110184697B (en) | Spinning process for silky soft yarn, yarn and cloth | |
| CN206279296U (en) | A kind of submissive bright and clean spinning apparatus of elastic pressure holding formula | |
| CN105401269B (en) | A kind of submissive bright and clean spinning apparatus of the spacing centralization type of groove | |
| CN206279295U (en) | A kind of submissive bright and clean spinning apparatus of elastic pressure holding centralization type | |
| CN105401270B (en) | A kind of submissive bright and clean spinning apparatus of constraint formula | |
| CN206521555U (en) | A kind of adaptive dynamic submissive bright and clean spinning apparatus of pressure holding formula | |
| CN206512348U (en) | A kind of submissive bright and clean spinning apparatus of self-regulated pressure holding centralization type | |
| CN106757589B (en) | A kind of submissive bright and clean spinning apparatus of elasticity pressure holding formula | |
| CN106400220B (en) | A kind of elasticity pressure holding submissive bright and clean spinning apparatus of centralization type | |
| CN205275831U (en) | Spacing gentle and agreeable bright and clean spinning device of formula that gathers of slot | |
| CN104451981A (en) | Multi-compact-spinning method with multi-compact-spinning encircling arc length improving function | |
| CN109594154B (en) | Viscose artificial silk yarn production device and spinning method thereof | |
| CN113463245A (en) | Cotton yarn and polyester filament yarn doubling and twisting fabric processing technology | |
| CN205275830U (en) | Gentle and agreeable bright and clean spinning device of restraint formula | |
| CN206562493U (en) | A kind of three-dimensional soft clean collecting-spinning device of traversing self-adjustable | |
| CN106757591A (en) | A kind of submissive bright and clean spinning apparatus of self-regulated pressure holding centralization type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20170531 Assignee: JIHUA 3542 TEXTILE Co.,Ltd. Assignor: Wuhan Textile University Contract record no.: X2022420000115 Denomination of invention: A flexible press type smooth spinning device Granted publication date: 20190308 License type: Common License Record date: 20221019 |
|
| EE01 | Entry into force of recordation of patent licensing contract |