EP2428131A1 - Material und Verfahren zur Herstellung von Gepäckstücken - Google Patents

Material und Verfahren zur Herstellung von Gepäckstücken Download PDF

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Publication number
EP2428131A1
EP2428131A1 EP20110181305 EP11181305A EP2428131A1 EP 2428131 A1 EP2428131 A1 EP 2428131A1 EP 20110181305 EP20110181305 EP 20110181305 EP 11181305 A EP11181305 A EP 11181305A EP 2428131 A1 EP2428131 A1 EP 2428131A1
Authority
EP
European Patent Office
Prior art keywords
case
luggage case
polypropylene
luggage
shell
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.)
Ceased
Application number
EP20110181305
Other languages
English (en)
French (fr)
Inventor
Ashish Kumar Saha
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VIP Industries Ltd
Original Assignee
VIP Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VIP Industries Ltd filed Critical VIP Industries Ltd
Publication of EP2428131A1 publication Critical patent/EP2428131A1/de
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C5/00—Rigid or semi-rigid luggage
    • A45C5/02—Materials therefor
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C7/00—Collapsible or extensible purses, luggage, bags or the like
    • A45C7/0018—Rigid or semi-rigid luggage
    • A45C7/0022—Rigid or semi-rigid luggage comprising an integrated expansion device
    • A45C7/0027—Rigid or semi-rigid luggage comprising an integrated expansion device with slide fastener strips
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/04—Frames
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/10—Arrangement of fasteners
    • A45C13/1023—Arrangement of fasteners with elongated profiles fastened by sliders
    • A45C13/103—Arrangement of zip-fasteners
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/10—Arrangement of fasteners
    • A45C13/1076—Arrangement of fasteners with a snap action
    • A45C13/1084—Arrangement of fasteners with a snap action of the latch-and-catch type
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C5/00—Rigid or semi-rigid luggage
    • A45C5/03—Suitcases
    • A45C2005/032—Suitcases semi-rigid, i.e. resistant against deformation and resilient, e.g. with a resilient frame
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C5/00—Rigid or semi-rigid luggage
    • A45C5/14—Rigid or semi-rigid luggage with built-in rolling means

Definitions

  • the present invention relates to a luggage case and more particularly to a Semi-hard case with or without reinforcing frame and a hard case with or without frame
  • top half shell (1) and the bottom half shell (2) of a hard luggage case is made up of plastic raw material viz. HDPE, PP , Reinforced PP, ABS or PC . These materials are basically hard and are processed by injection moulding or Vacuum forming technology. All these materials have a tendency to break if the force applied on it is more than it's breaking yield at normal atmospheric temperatures. (Minus 20 °C to 50 °C).
  • HDPE & PP material shells (1) (2) are generally injection moulded and are hard.
  • the luggage case made from these materials known in prior art are complete injection moulded case (IML) or the case with reinforcing frame.
  • Reinforced PP shell is generally pressure formed and are very hard,
  • the luggage case made from this material known in prior art is stitched Zippered case or the case with reinforcing frame , but no IML.
  • ABS & PC shell is generally Vacuum formed or pressure formed and are hard
  • the luggage case made from this material known in prior art is stitched Zippered case, the case with reinforcing frame and Injection moulded case (IML).
  • IML Injection moulded case
  • suitcases incorporating a towing handle structure (11) which is usually moveable between a user case towing position and a retracted stowage position.
  • Suitcases can conveniently be considered as comprising two major types, the first the so called soft case and the second the so called hard-case.
  • the soft case conventionally incorporates a metal or plastic frame work which provides the means whereby the required shape and visual appearance of the case is maintained and also services to support a soft outer covering.
  • hard skinned cases are regarded as being hard skinned in the sense that the walls -formed as to provide a substantially rigid or hard skin in the sense that the walls, top (1) and bottom (2) are formed by material that is sufficiently rigid in that it retains its shape and form in use.
  • a material commonly used for forming hard skinned cases is a polypropylene / ABS or PC.
  • Such cases comprise two rigid shells that are hinged (13) one to the other with purpose built hinges and which meet with an inter nesting tongue and groove frame like formation.
  • Mechanical fasteners such as hinged locks are used to retain the lid portion (1) and the based portion in their closed positions.
  • the so called “hard” cases incorporate a metal or plastics framework extending all around the internal perimeter of the case in such position as to provide structural strength to the case and additional to ensure that any internal tongue and groove arrangements will always nest one relative to the other.
  • the objective of this invention is to provide a flexible shell for a Zippered upright case, which does not break with in the normal atmospheric temperature (minus 20 deg centigrade to 50 deg centigrade) under very abusive test conditions to provide high strength & durability of the luggage case intended for use while travel.
  • Another objective of the invention is to provide ease of stitching of fastening means such as zip (4) on the shell (1) (2) for construction of the luggage case.
  • Yet another objective of the invention is to provide the looks of the luggage case like Polycarbonate luggage case or a soft luggage case.
  • Another object of invention is to provide a flexible shell for a Suitcase with or without a reinforcing frame which does not break with in the normal atmospheric temperature (minus 20 deg centigrade to 50 deg centigrade) under very abusive test conditions to provide high strength & durability of the luggage case intended for use while travel.
  • a further object is the provision of a suitcase whose appearance departs from that of a purely standard rectangular block like formation for a suitcase.
  • the invention relates to novel modified polypropylene compositions, especially for luggage case applications. More particularly, the invention relates the blend of PP and elastomer which are compatible to polypropylene are heated to melt in the injection moulding unit barrel. The melted material of the blend bonds together in the predetermined proportion of PP - 60 to 90% and Elastomer which are compatible to Polypropylene - 40 to 10% depending on the product design & structure (For example - Engage , Ethyl vinyl acetate (EVA) etc. to give a single material type with molecular continuity. In short, the material properties are enhanced through molecular properties of each polymer, resulting in manufacture of luggage case as "No break". [This modified polypropylene composition for a luggage case is henceforth called as "K-PP"]
  • the Semi-hard case comprising of top (1) & bottom shells (2) as in Figure 01 , Figure 03 , Figure 04 and another case as in Figure 05 comprising of two shells (101) are made with K-PP constructed in suitable shape and design with suitable joining methods like beading (3), zip (4) and thread stitching (14) construction, or fitting the edges of the shells in a suitable metal or plastic frame (104) (105) .
  • This is a unique distinguished category of luggage style hereafter called as "PP Zippered case" in relation to the known categories of the luggage styles.
  • a luggage case made with the modified composition named K-PP has excellent properties, especially a very high impact strength, elasticity and surface stability.
  • top half (1) & bottom half (2) of a luggage case as in Figure 01 , Figure 03 , Figure 04 and another case as in Figure 05 comprising of two shells (101) made with K-PP has the potential to be made with all the design characteristics of an injection moulded part. It overcomes the design constraints of thermoformed top half & bottom half of a luggage case.
  • K-PP is low density and is soft which allows the potential for constructing a luggage case with zipped sections of a zip fastener arrangement (4) by a stitching operation involving a securing thread (14).
  • K-PP is low density, combined with good mechanical properties, allows the potential for significant weight saving of a luggage case made with this material over the luggage case made with an equivalent PP .
  • Design studies suggest 15 % weight savings are possible for the same impact strength through careful attention to design details of top half (1) & bottom half (2) of the luggage case as in Figure 01 , Figure 03 , Figure 04 and another case as in Figure 05 comprising of two shells (101), especially on thicknesses.
  • This invention relates to the construction of luggage such as suitcases for use by travelers.
  • a "Semi-hard" case is regarded as being such by reason of the fact that the top bottom side and end walls cannot readily be pierced by a blade or needle as is the case with known soft case construction.
  • a further object is the provision of a suitcase whose appearance departs from that of a purely standard rectangular block like formation for a suitcase.
  • a method of constructing a hard suitcase as shown in ( Figure 01 ) including forming a shaped based portion (2) and a shaped lid portion (1) from a plastic material of such characteristic that the portions retain their intended shape, and attracting to each of said portions the respective zipped portion of a zip fastener (4) arrangement by a stitching operation involving a securing thread (14).
  • a further aspect of the invention provides a method of constructing a frameless "Semi-hard" suitcase characterized by the steps of forming a base portion (2) and a lid (1) portion from a material of such characteristic that the portions retain their formed shape and attaching to each of side portions the respective zipped portions of a zip fasteners arrangement (4) by a stitching operation involving a securing thread (14) as per Figure 02.
  • a method of constructing a frameless "Semi-hard" soft case looking suitcase characterized by the steps of forming a tray like base portion (2) and tray like lid portion (1) from a material of such characteristics that the base (2) and lid portions (1) retain their intended soft case looking shape and attaching the to the free edge regions of the walls of said tray like portion by stitching operation using a thread (14), the respective fasteners arrangement for enabling the base (2) and lid portion (1) to be retained in a suitcase closed condition.
  • a means, for enabling said increase in the closed volume of the suitcase includes a zip fastener arrangement (17).
  • the zip fastener arrangement (4) (17) is a two part zip fastener arrangement.
  • a method of constructing a Semi-hard suitcase including forming a base portion (2) and a lid portion (1) from a material of such characteristic that the portions retain their formed shape and attaching to each of said portions the respective zipped of portion of a zip fastener arrangement (4) by a stitching operation involving a securing thread (14).
  • a method of constructing a suitcase including forming like a tray like base portion (2) and a tray like lid portion (1) from a material of such characteristics that the portions retain their formed shape, and attaching to each of the said portions the respective zipped sections of a zip fastener (4) (17) arrangement by a stitching operation involving a securing thread (14), the zip fastener arrangement (4) (17) being such as to enable the suitcase to be retained in a closed condition , and incorporating means for enabling increase in the storage volume of the closed suitcase.
  • a suitcase is provided with four sets of floor engaging support members (8), there being a set being provided one to each of two traverse surfaces of the suitcase whereby the case can be stood on a support surface on one or the other of two orientations.
  • two of the elements of one such set (8) are provided upon the bottom portion and incorporate wheels/rolls (7) whereby the case is rendered towable, and in which at least one other element of this set is located on the lid portion (1), the arrangement being such as to provided a stable support for the case when not being towed.
  • side of the base portion that is opposite to the wheels/rolls (7) is provided with a case carrying handle (10) and a retractable towing means (11).
  • two elements of the second such set are provided upon a longer side wall of the base portion (2) and two further elements of this set are provided upon a corresponding wall of the lid portion(1), the arrangement being such that the case when resting on the elements (8) of this set is stable and wherein a carrying handle (12) is provided on the side of the bottom portion that is opposite to the side with said elements(8).
  • the case incorporates means whereby the volume of the case is expandable.
  • the expandability is achieved by providing a tow part Zip fastener arrangement (17) of which a first Zip part (4) is associated with the closing of the case and of which a second Zip part (17) is associated with the expandability of the case.
  • the second Zip part (17) is interposed between the lid section of the case and the portion of the zip fastener arrangement (4) associated with the closure of the case.
  • the second Zip part (17) includes a first section attached to the case and additionally along the peripheral edge of a strip of flexible material (20) circumscribing the mouth of the lid portion (1) and attached thereto, and a second section that is attached to the peripheral edge of the strip of material (20) that is remote from the case lid (1) portion.
  • the suitcase comprises of a peripheral frame (104) (105) to which is suitably secured opposed , shells (101) made with K-PP.
  • a handle (109) and locks (106)(1061) are fastened to the bottom section of the frame (105) in the embodiment illustrated.
  • the invention is not limited to the particular lock construction shown in the drawing which is of the single action latch type lock , nor is the invention limited to the shells (101) that are illustrated.
  • the frames (104) (105) are defined by four sides and connected to each other by suitable hinges (not shown in figure) .
  • Each frame section may be continuous extrusion profile that is bent to form the needed corners or the sides may be an extrusion that is cut to the required lengths which are then joined by cast corners (not shown in figure) .
  • the handle (109) is pivotly fixed on lugs (110) which is securely fixed on the frame.
  • Rivets (111) pass through the holes in shells (101) and frame (104)(105) and is flared on the other side to securely fix shells(101) on the frame (104)(105)
  • the hooks (not shown in figure) are mounted on top frame (104) with rivets.
  • the Locks mounted on bottom frame (105) when engages with these hooks in closed condition restricts the opening of top lid (104) from bottom (105),
  • a New Generation Polymer composition :
  • K-PP captures the exceptional mechanical properties of polypropylene and Elastomers which are compatible to polypropylene. High tensile strength but flexible and outstanding impact resistance provides the opportunity to make parts with unprecedented properties in a blend of PP and Elastomers which are compatible to Polypropylene thermoplastic.
  • the blend of PP and elastomer which are compatible to polypropylene are heated to melt in the injection moulding unit barrel.
  • the melted material of the blend bonds together in the predetermined proportion of PP - 60 to 90% and Elastomer which are compatible to Polypropylene - 40 to 10% depending on the product design & structure (For example - Engage , Ethyl vinyl acetate (EVA) etc. to give a single material type with molecular continuity.
  • EVA Ethyl vinyl acetate
  • K-PP is made by blending Polypropylene polymer and elastomers which are compatible to Polypropylene in a best performance proportions ranging from 60:40 to 90: 10 depending on the product design & structure along with the mixing of the desired colour pigments.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
EP20110181305 2010-09-14 2011-09-14 Material und Verfahren zur Herstellung von Gepäckstücken Ceased EP2428131A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN2536MU2010 2010-09-14

Publications (1)

Publication Number Publication Date
EP2428131A1 true EP2428131A1 (de) 2012-03-14

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EP20110181305 Ceased EP2428131A1 (de) 2010-09-14 2011-09-14 Material und Verfahren zur Herstellung von Gepäckstücken

Country Status (2)

Country Link
EP (1) EP2428131A1 (de)
CN (1) CN102396862B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104138119A (zh) * 2014-07-22 2014-11-12 张家港三久箱包有限公司 一种多功能行李箱
DE102013109121A1 (de) * 2013-08-22 2015-02-26 Wei-Hung Lai Hartschalenkoffer mit veränderbarem Fassungsvermögen
EP3106053A1 (de) * 2015-06-19 2016-12-21 Briggs & Riley Travelware LLC Hartschalenrollkoffer mit komprimierung und dehnung
WO2017137995A1 (en) * 2016-02-11 2017-08-17 Travel Smart Ltd Injection-molded cases and method of their manufacture
CN113615946A (zh) * 2015-10-21 2021-11-09 帕瓦贸易有限公司 用于爱好设备的箱子或罩子
CN116528720A (zh) * 2020-10-14 2023-08-01 加利福尼亚创新股份有限公司 带有悬挂装置的软面容器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103393266B (zh) * 2013-08-05 2015-08-12 温州市瓯海丽岙跃进橡塑复合厂 一种旅行箱及其加工方法
FR3046032B1 (fr) * 2015-12-24 2020-10-30 Vuitton Louis Sa Bagage muni d'un dispositif de verrouillage de fermeture a glissiere
CN106496787A (zh) * 2016-11-02 2017-03-15 无锡艾科瑞思产品设计与研究有限公司 一种聚丙烯复合材料拉杆箱的制备工艺
CN109330134A (zh) * 2018-11-17 2019-02-15 南京景熙箱包有限公司 一种具有防水功能的箱包

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329414A (fr) * 1962-07-23 1963-06-07 Hoechst Ag Valises en mélanges de polypropylène et de copolymères d'éthylène
DE9201216U1 (de) * 1992-02-01 1992-03-26 Grebenstein Gmbh, 3257 Springe Koffer
GB2403211A (en) * 2003-06-27 2004-12-29 Landor & Hawa Int Ltd Suitcase having a zip fastener arrangement

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CN1070431C (zh) * 1995-03-28 2001-09-05 丰田合成株式会社 气囊装置的衬垫
CN1226342C (zh) * 2002-06-21 2005-11-09 中山大学 一种增强、增韧聚丙烯复合材料及其制备方法
MX2007014047A (es) * 2005-05-12 2008-02-12 Dow Global Technologies Inc Laminado extruido, termoformado, con brillo reducido.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329414A (fr) * 1962-07-23 1963-06-07 Hoechst Ag Valises en mélanges de polypropylène et de copolymères d'éthylène
DE9201216U1 (de) * 1992-02-01 1992-03-26 Grebenstein Gmbh, 3257 Springe Koffer
GB2403211A (en) * 2003-06-27 2004-12-29 Landor & Hawa Int Ltd Suitcase having a zip fastener arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELVIRA B. RABINOVITCH, JAMES W. SUMMERS, AND GREG SMITH: "Impact modification of polypropylene", JOURNAL OF VINYL & ADDITIVE TECHNOLOGY, vol. 9, no. 2, 30 June 2003 (2003-06-30), Retrieved from the Internet <URL:http://onlinelibrary.wiley.com/doi/10.1002/vnl.10068/pdf> [retrieved on 20160309] *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013109121A1 (de) * 2013-08-22 2015-02-26 Wei-Hung Lai Hartschalenkoffer mit veränderbarem Fassungsvermögen
CN104138119A (zh) * 2014-07-22 2014-11-12 张家港三久箱包有限公司 一种多功能行李箱
EP3106053A1 (de) * 2015-06-19 2016-12-21 Briggs & Riley Travelware LLC Hartschalenrollkoffer mit komprimierung und dehnung
JP2017006609A (ja) * 2015-06-19 2017-01-12 ブリッグス アンド ライリー トラヴェルウエア エルエルシーＢｒｉｇｇｓ ＆ Ｒｉｌｅｙ Ｔｒａｖｅｌｗａｒｅ Ｌｌｃ 圧縮・拡張機能を備えた硬質表面車輪付ケース
US9826808B2 (en) 2015-06-19 2017-11-28 Briggs And Riley Travelware, Llc Hard sided wheeled case with compression-expansion
CN113615946A (zh) * 2015-10-21 2021-11-09 帕瓦贸易有限公司 用于爱好设备的箱子或罩子
WO2017137995A1 (en) * 2016-02-11 2017-08-17 Travel Smart Ltd Injection-molded cases and method of their manufacture
CN116528720A (zh) * 2020-10-14 2023-08-01 加利福尼亚创新股份有限公司 带有悬挂装置的软面容器

Also Published As

Publication number Publication date
CN102396862B (zh) 2015-08-26
CN102396862A (zh) 2012-04-04

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