US20050057085A1 - Backrest and method for making backrest - Google Patents

Backrest and method for making backrest Download PDF

Info

Publication number
US20050057085A1
US20050057085A1 US10/662,026 US66202603A US2005057085A1 US 20050057085 A1 US20050057085 A1 US 20050057085A1 US 66202603 A US66202603 A US 66202603A US 2005057085 A1 US2005057085 A1 US 2005057085A1
Authority
US
United States
Prior art keywords
web
frame
ring
backrest
margin
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.)
Abandoned
Application number
US10/662,026
Inventor
Hsiu-Hsueh Wu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US10/662,026 priority Critical patent/US20050057085A1/en
Publication of US20050057085A1 publication Critical patent/US20050057085A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/02—Upholstery attaching means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5342—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles
    • B29C66/53421—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles said substantially flat extra element being flexible, e.g. a membrane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B29C66/12221—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment the two joint-segments being lapped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2012/00—Frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/44—Furniture or parts thereof
    • B29L2031/443—Chairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/737—Articles provided with holes, e.g. grids, sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/771—Seats

Definitions

  • the present invention relates to a backrest and, more particularly, to a method for making such a backrest.
  • a typical chair for use in an office includes a seat and a backrest.
  • the seat and the backrest are both made from foam material so as to provide a soft feeling to a person sitting in the chair.
  • the backrest made of foam material is not good for dissipating heat produced by the person.
  • the backrest made of foam material is heavy and bulky and, hence, not economic regarding transportation.
  • the present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
  • a backrest includes a frame, a web and a ring.
  • the frame includes a margin and two rims extending on a side of the margin and a gap defined between the rims.
  • the web is spread on the side of the frame.
  • the ring is put on the web and fit in the annular groove so that the web is tightly spread on the frame.
  • FIG. 1 is a flowchart of a method for making a backrest according to the preferred embodiment of the present invention.
  • FIG. 2 is an exploded view of a backrest according to the preferred embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the backrest of FIG. 2 .
  • FIGS. 4-9 are perspective views of a mold assembly in various steps of the method of FIG. 1 for making the backrest of FIG. 2 .
  • FIG. 10 is a perspective view of the backrest of FIG. 1 .
  • FIG. 11 is a perspective view of the backrest of FIG. 10 used in a chair.
  • a backrest shown in FIGS. 2, 3 , 10 and 11 is made in a method shown in FIGS. 1 and 4 - 9 .
  • the backrest includes a frame 10 , a web 20 , a ring 30 , a cushion 40 and a cover 50 .
  • the frame 10 includes a margin 11 and two rims 12 extending on a front side of the margin 11 .
  • a gap 13 is defined between the rims 12 .
  • the web 20 is put on a front side of the frame 10 .
  • the ring 30 is put on a front side of the web 20 .
  • the ring 30 and an annular portion of the web 20 are fit into the annular groove 13 .
  • the web 20 is tightly spread on the frame 10 , i.e., tension is produced in the web 20 .
  • the cushion 40 is put in the frame 10 .
  • the cushion 40 is compressed between the margin 11 and the web 20 .
  • the web 20 is more tightly spread on the frame 10 , i.e., the tension in the web 20 is increased.
  • the cover 50 is installed around the frame 10 .
  • a mold assembly is provided.
  • the mold assembly includes a lower mold 60 , a middle mold 62 and an upper mold 70 .
  • the lower mold 60 defines a cavity 61 in an upper side.
  • the profile of the cavity 61 is compliant with that of the backrest.
  • the profile of the middle mold 62 is compliant with that of the cavity 61 .
  • the upper mold 70 defines a cavity 71 in a lower side.
  • the profile of the cavity 71 is compliant with that of the middle mold 62 .
  • step S 15 the frame 10 is put in the cavity 61 .
  • the rims 12 face up.
  • step S 20 the middle mold 62 is lowered against the margin 11 .
  • the frame 10 is held in position.
  • the rims 12 are exposed.
  • step S 25 the web 20 is laid on the middle mold 62 .
  • the web 20 covers the rims 12 .
  • step S 30 the ring 30 is put on the web 20 .
  • the ring 30 and an annular portion of the web 20 are forced into the annular groove 13 .
  • the web 20 is tightly spread on the frame 10 .
  • step S 35 the upper mold 70 is lowered against the ring 30 .
  • High frequency is exerted on the frame 10 , the web 20 and the ring 30 .
  • the frame 10 , the web 20 and the ring 30 are heated and therefore partly melted.
  • the frame 10 , the web 20 and the ring 30 adhere to one another when they cool down.
  • step S 40 the upper mold 70 is lifted from the ring 30 and returned to its original position.
  • the middle mold 62 is lifted from the lower mold 60 and returned to its original position.
  • step S 45 the frame 10 , the web 20 and the ring 30 , as a whole, are moved from the middle mold 62 .
  • the cushion 40 is put in the frame 10 .
  • the cushion 40 is compressed between the margin 11 and the web 20 .
  • the web 20 is more tightly spread on the frame 10 .
  • step S 55 the cover 50 is installed around the frame 10 .
  • step S 60 the backrest is finished.

Abstract

A backrest includes a frame, a web and a ring. The frame includes a margin and two rims extending on a side of the margin and a gap defined between the rims. The web is spread on the side of the frame. The ring is put on the web and fit in the annular groove so that the web is tightly spread on the frame.

Description

    FIELD OF INVENTION
  • The present invention relates to a backrest and, more particularly, to a method for making such a backrest.
    • BACKGROUND OF INVENTION
  • A typical chair for use in an office includes a seat and a backrest. The seat and the backrest are both made from foam material so as to provide a soft feeling to a person sitting in the chair. However, the backrest made of foam material is not good for dissipating heat produced by the person. Moreover, the backrest made of foam material is heavy and bulky and, hence, not economic regarding transportation.
  • The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
    • SUMMARY OF INVENTION
  • It is an objective of the present invention to provide a backrest with good dissipation of heat produced by a person's back laid against it.
  • It is another objective of the present invention to provide a backrest that is light in weight and compact in size.
  • According to the present invention, a backrest includes a frame, a web and a ring. The frame includes a margin and two rims extending on a side of the margin and a gap defined between the rims. The web is spread on the side of the frame. The ring is put on the web and fit in the annular groove so that the web is tightly spread on the frame.
  • Other objects, advantages and novel features of the invention will become more apparent from the following detailed description in conjunction with the attached drawings.
    • BRIEF DESCRIPTION OF DRAWINGS
  • The present invention will be described via detailed illustration of embodiments referring to the drawings.
  • FIG. 1 is a flowchart of a method for making a backrest according to the preferred embodiment of the present invention.
  • FIG. 2 is an exploded view of a backrest according to the preferred embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the backrest of FIG. 2.
  • FIGS. 4-9 are perspective views of a mold assembly in various steps of the method of FIG. 1 for making the backrest of FIG. 2.
  • FIG. 10 is a perspective view of the backrest of FIG. 1.
  • FIG. 11 is a perspective view of the backrest of FIG. 10 used in a chair.
    • DETAILED DESCRIPTION OF EMBODIMENTS
  • In accordance with the preferred embodiment of the present invention, a backrest shown in FIGS. 2, 3, 10 and 11 is made in a method shown in FIGS. 1 and 4-9.
  • Referring to FIG. 2, the backrest includes a frame 10, a web 20, a ring 30, a cushion 40 and a cover 50. The frame 10 includes a margin 11 and two rims 12 extending on a front side of the margin 11. A gap 13 is defined between the rims 12.
  • Referring to FIG. 3, the web 20 is put on a front side of the frame 10. The ring 30 is put on a front side of the web 20. The ring 30 and an annular portion of the web 20 are fit into the annular groove 13. Thus, the web 20 is tightly spread on the frame 10, i.e., tension is produced in the web 20. The cushion 40 is put in the frame 10. The cushion 40 is compressed between the margin 11 and the web 20. Thus, the web 20 is more tightly spread on the frame 10, i.e., the tension in the web 20 is increased. The cover 50 is installed around the frame 10.
  • Referring to FIGS. 1 and 4, at step S10, a mold assembly is provided. The mold assembly includes a lower mold 60, a middle mold 62 and an upper mold 70. The lower mold 60 defines a cavity 61 in an upper side. The profile of the cavity 61 is compliant with that of the backrest. The profile of the middle mold 62 is compliant with that of the cavity 61.
  • The upper mold 70 defines a cavity 71 in a lower side. The profile of the cavity 71 is compliant with that of the middle mold 62.
  • Referring to FIGS. 1 and 5, at step S15, the frame 10 is put in the cavity 61. The rims 12 face up.
  • Referring to FIGS. 1 and 6, at step S20, the middle mold 62 is lowered against the margin 11. Thus, the frame 10 is held in position. The rims 12 are exposed.
  • Referring to FIGS. 1 and 7, at step S25, the web 20 is laid on the middle mold 62. The web 20 covers the rims 12.
  • Referring to FIGS. 1 and 8, at step S30, the ring 30 is put on the web 20. The ring 30 and an annular portion of the web 20 are forced into the annular groove 13. Thus, the web 20 is tightly spread on the frame 10.
  • Referring to FIGS. 1 and 9, at step S35, the upper mold 70 is lowered against the ring 30. High frequency is exerted on the frame 10, the web 20 and the ring 30. Thus, the frame 10, the web 20 and the ring 30 are heated and therefore partly melted. The frame 10, the web 20 and the ring 30 adhere to one another when they cool down.
  • Referring to FIG. 1, at step S40, the upper mold 70 is lifted from the ring 30 and returned to its original position. The middle mold 62 is lifted from the lower mold 60 and returned to its original position.
  • At step S45, the frame 10, the web 20 and the ring 30, as a whole, are moved from the middle mold 62.
  • At step S50, the cushion 40 is put in the frame 10. The cushion 40 is compressed between the margin 11 and the web 20. Thus, the web 20 is more tightly spread on the frame 10.
  • At step S55, the cover 50 is installed around the frame 10.
  • At step S60, the backrest is finished.
  • The present invention has been described via detailed illustration of some embodiments. Those skilled in the art can derive variations from the embodiments without departing from the scope of the present invention. Therefore, the embodiments shall not limit the scope of the present invention defined in the claims.

Claims (9)

1. A backrest including:
a frame including a margin and two rims extending on a side of the margin and a gap defined between the rims;
a web spread on the side of the frame; and
a ring put on the web and fit in the annular groove so that the web is tightly spread on the frame.
2. The backrest according to claim 1 including a cushion arranged between the margin and the web so that the web is more tightly spread on the frame.
3. The backrest according to claim 1 including a cover installed around the frame.
4. A method for making a backrest comprising the following steps:
providing a frame including a margin and two rims extending on a side of the margin and a gap defined between the rims;
providing a web;
providing a ring;
providing a mold assembly including:
a lower mold defining a cavity in an upper side;
a middle mold; and
an upper mold defining a cavity in a lower side;
putting the frame in the cavity of the lower mold with the rims facing up;
holding the frame in position by means of lowering the middle mold against the margin, with the rims exposed.
spreading the web on the middle mold, with the web covering the rims;
forcing the ring and an annular portion of the web into the annular groove so as to tightly spread the web on the frame;
pressing the ring, the web and the frame against one another by means of lowering the upper mold against the ring; and
adhering the frame, the web and the ring to one another;
returning the upper mold and the lower mold to their original positions; and
removing the frame, the web and the ring, as a whole, from the middle mold.
5. The method according to claim 4 wherein the step of adhering the frame, the web and the heat pressing the ring to one another includes a step of partly melting them.
6. The method according to claim 5 wherein the step of partly melting the frame, the web and the ring includes a step of heating them.
7. The method according to claim 6 wherein the step of heating the frame, the web and the ring includes a step of exerting high frequency on them.
8. The method according to claim 4 including a step of providing a cushion between the margin and the web so that the web is more tightly spread on the frame.
9. The method according to claim 4 including a step of providing a cover around the frame.
US10/662,026 2003-09-12 2003-09-12 Backrest and method for making backrest Abandoned US20050057085A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/662,026 US20050057085A1 (en) 2003-09-12 2003-09-12 Backrest and method for making backrest

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/662,026 US20050057085A1 (en) 2003-09-12 2003-09-12 Backrest and method for making backrest

Publications (1)

Publication Number Publication Date
US20050057085A1 true US20050057085A1 (en) 2005-03-17

Family

ID=34274004

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/662,026 Abandoned US20050057085A1 (en) 2003-09-12 2003-09-12 Backrest and method for making backrest

Country Status (1)

Country Link
US (1) US20050057085A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080079307A1 (en) * 2006-09-30 2008-04-03 Tung-Hua Su Chair Backrest
US20080157580A1 (en) * 2006-12-29 2008-07-03 Peter Lin Body-supporting device
US20110057496A1 (en) * 2009-09-08 2011-03-10 Tsan-Ching Wang Seats for vehicles
US20110057497A1 (en) * 2009-09-08 2011-03-10 Tsan-Ching Wang Combination of net and frame
US20120313419A1 (en) * 2010-02-10 2012-12-13 Okamura Corporation Stretching structure of chair upholstery material
EP2837479A1 (en) * 2013-08-12 2015-02-18 Keter Plastic Ltd. Support panel
US20200163465A1 (en) * 2018-11-25 2020-05-28 Chih-Cheng Su Assembling structure of seat or backrest of mesh chair
US10842281B2 (en) 2012-09-20 2020-11-24 Steelcase Inc. Control assembly for chair
US20220015546A1 (en) * 2019-02-21 2022-01-20 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US20220369812A1 (en) * 2021-05-24 2022-11-24 Comfort Office Furniture Co., Ltd Guangdong Mesh frame and chair

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015034A (en) * 1988-11-25 1991-05-14 Prince Corporation Upholstery system
US6082824A (en) * 1996-11-08 2000-07-04 Chow; William W. Therapeutic sling seat
US20010040404A1 (en) * 1999-12-28 2001-11-15 Asahi Gomu Kako Co., Ltd. Cushion structure manufacturing method and apparatus of the same
US6439665B1 (en) * 2000-06-09 2002-08-27 Stylex Ergonomic chair with mesh seat and back
US6478381B1 (en) * 1999-10-29 2002-11-12 Lear Corporation Elastomeric seat back and slide-over head rest assembly for a vehicle seat
US6550866B1 (en) * 2002-01-24 2003-04-22 Tung-Hua Su Chair backrest with ventilating function
US20030168901A1 (en) * 2001-06-29 2003-09-11 Wilkerson Larry A. Chair having a suspension seat assembly
US6702390B2 (en) * 1992-06-15 2004-03-09 Herman Miller, Inc. Support assembly for a seating structure
US20040124689A1 (en) * 2002-07-23 2004-07-01 Okumura Corporation Structure for mounting a net member to a frame for a seat or backrest of a chair
US6899398B2 (en) * 2000-09-20 2005-05-31 Dahti, Inc. Carrier and attachment method for load-bearing fabric

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015034A (en) * 1988-11-25 1991-05-14 Prince Corporation Upholstery system
US6733080B2 (en) * 1992-06-15 2004-05-11 Herman Miller, Inc. Seating structure having a backrest with a flexible membrane and a moveable armrest
US6702390B2 (en) * 1992-06-15 2004-03-09 Herman Miller, Inc. Support assembly for a seating structure
US6082824A (en) * 1996-11-08 2000-07-04 Chow; William W. Therapeutic sling seat
US6755477B2 (en) * 1996-11-08 2004-06-29 William W. Chow Therapeutic sling seat
US6478381B1 (en) * 1999-10-29 2002-11-12 Lear Corporation Elastomeric seat back and slide-over head rest assembly for a vehicle seat
US20010040404A1 (en) * 1999-12-28 2001-11-15 Asahi Gomu Kako Co., Ltd. Cushion structure manufacturing method and apparatus of the same
US6758528B2 (en) * 1999-12-28 2004-07-06 Asahi Gomu Kako Co., Ltd. Cushion structure manufacturing method and apparatus of the same
US6439665B1 (en) * 2000-06-09 2002-08-27 Stylex Ergonomic chair with mesh seat and back
US6899398B2 (en) * 2000-09-20 2005-05-31 Dahti, Inc. Carrier and attachment method for load-bearing fabric
US20030168901A1 (en) * 2001-06-29 2003-09-11 Wilkerson Larry A. Chair having a suspension seat assembly
US6550866B1 (en) * 2002-01-24 2003-04-22 Tung-Hua Su Chair backrest with ventilating function
US20040124689A1 (en) * 2002-07-23 2004-07-01 Okumura Corporation Structure for mounting a net member to a frame for a seat or backrest of a chair

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080079307A1 (en) * 2006-09-30 2008-04-03 Tung-Hua Su Chair Backrest
US20080157580A1 (en) * 2006-12-29 2008-07-03 Peter Lin Body-supporting device
US7425039B2 (en) * 2006-12-29 2008-09-16 Peter Lin Body-supporting device
US20110057496A1 (en) * 2009-09-08 2011-03-10 Tsan-Ching Wang Seats for vehicles
US20110057497A1 (en) * 2009-09-08 2011-03-10 Tsan-Ching Wang Combination of net and frame
US20120313419A1 (en) * 2010-02-10 2012-12-13 Okamura Corporation Stretching structure of chair upholstery material
US8777321B2 (en) * 2010-02-10 2014-07-15 Okamura Corporation Stretching structure of chair upholstery material
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US10842281B2 (en) 2012-09-20 2020-11-24 Steelcase Inc. Control assembly for chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US11464341B2 (en) 2012-09-20 2022-10-11 Steelcase Inc. Chair assembly with upholstery covering
US9533457B2 (en) 2013-08-12 2017-01-03 Keter Plastic Ltd. Support panel
EP2837479A1 (en) * 2013-08-12 2015-02-18 Keter Plastic Ltd. Support panel
US20200163465A1 (en) * 2018-11-25 2020-05-28 Chih-Cheng Su Assembling structure of seat or backrest of mesh chair
US20220015546A1 (en) * 2019-02-21 2022-01-20 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11602223B2 (en) * 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US20220369812A1 (en) * 2021-05-24 2022-11-24 Comfort Office Furniture Co., Ltd Guangdong Mesh frame and chair

Similar Documents

Publication Publication Date Title
US20050057085A1 (en) Backrest and method for making backrest
US6007149A (en) Bicycle saddle with adjustable cushioning
US4718153A (en) Cushion manufacturing process
US5129705A (en) Head support
WO2008064168A3 (en) Apparatus and methods for forming hat stiffened composite parts using thermally expansive tooling cauls
US10849450B1 (en) Anti-fatigue mat with an encapsulatively sealed gel member
US20140084653A1 (en) Chair having a dynamically-flexible back and seat
JPH05300822A (en) Production of cushion material
CA2128925A1 (en) Bonded Seat Assembly
US20080164744A1 (en) Plastic stool and a method for making the same
US5340192A (en) Bicycle seat structure
USD484350S1 (en) Child's seat cushion
US7020904B2 (en) Swimming goggles
USD513456S1 (en) Stacking chair
US20060060625A1 (en) Custom molded backpack hipbelt and method
JP2006346031A (en) Cushion for chair and method of manufacturing the same
EP3920549A1 (en) Headphone device
KR20230020686A (en) Vehicle crash pad press device capable of automatically wrapping real wood sheets
JPH0615069A (en) Adhesive fixing method of sheet skin for cushion pad
KR20170040705A (en) Method of producing children with the character shape sofa
KR102400314B1 (en) Cushion material and mold thereof
WO2020136816A1 (en) Seat covering material, production method for seat covering material, and mold device used in production of seat covering material
JP3643266B2 (en) Floor mat manufacturing method, manufacturing apparatus therefor, and floor mat
USD481215S1 (en) Seat frame
JP7049029B1 (en) Frames for costumes, costumes, and their manufacturing methods

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION