CN86211114U - Protective sleeve of flat recording medium - Google Patents
Protective sleeve of flat recording medium Download PDFInfo
- Publication number
- CN86211114U CN86211114U CN 86211114 CN86211114U CN86211114U CN 86211114 U CN86211114 U CN 86211114U CN 86211114 CN86211114 CN 86211114 CN 86211114 U CN86211114 U CN 86211114U CN 86211114 U CN86211114 U CN 86211114U
- Authority
- CN
- China
- Prior art keywords
- protective sleeve
- blank
- coating
- packing felt
- packing
- 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.)
- Expired - Lifetime
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 42
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 238000012856 packing Methods 0.000 claims description 58
- 229910000679 solder Inorganic materials 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000002671 adjuvant Substances 0.000 claims description 4
- 239000002216 antistatic agent Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 7
- 230000008092 positive effect Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 description 6
- 238000004080 punching Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Landscapes
- Gasket Seals (AREA)
Abstract
The utility model is used for flat recording medium, such as in the protective sleeve of the thin magnetic film, the fixed disk, the disc, or the disc of television recording. The blanket coating in the protective sleeve is fixed on the edge close to the protective sleeve and on the contour line close to the opening by short distance welding spots, and hot welding spots are parted with large times of distance with each other in the middle. The way by which the pad is formed makes a more positive effect on cleaning.
Description
The present invention relates to a kind of protective sleeve that is used for flat recording medium; data medium especially for flexibility; this protective sleeve comprises a plastics blank that opening is arranged on it; blank has at least two place's outward flanges to be bent and is bonded together; forming or the sheath of sealing or, and make it to invest packing felt coating on the blank with the hot weld method on one side by the capillary that produces the needle-like solder joint at the most along the sheath of opening.
Relate to be used to record, this known protective sleeve of the kinds such as disk, film and X-ray sheet of telerecording and data recording, generally be the form of flat, foursquare or rectangular envelope sample sheath.No matter be used in the recording materials how (perhaps they can store magnetic, light or other signal) in the specific recording medium, recording medium requires not have dirt, dust etc., so that this material is reduced to minimum at the deleterious effect aspect the broadcast institute tracer signal quality.When recording medium is taken out from sheath, the danger that dust etc. are invaded is in the registered trademark of Flexy Disk(BASF joint-stock company) more strengthen in the cover, recording medium is the thin magnetic film form in this cover, except that several places opening, give complete closed by sheath, and during record/play operation, remain sealing.
Flexy Disk sheath is, for example, and by the blank manufacturing of hard polyvinyl chloride film.Before being folded into sheath sample form, the side that can become the sheath inner face later on is provided with the liner that non-textile is made, and is called " packing felt " or " packing felt coating " hereinafter.Blank by punching so that the sheath opening to be provided.Then it is folded to form sheath and some flangings, when folding operation was finished, all flangings stretched out superimposed Zhu Bianshang at sheath, and above being welded on.With the soft medium of disc that disperse the magnet coating; be inserted in the sheath then; this sheath is still opened at a lateral edges; after this terminal flanging of this sheath superimposed with the top edge that is welded on sheath; described thin magnetic film thereby be protected, and all each limits complete closed all.When described thin magnetic film was used for Flexy Disk disc driver record or play signal, film remained in the sheath the inside.
Germany disclosed application DOS3,140,088 disclose the sheath that is used for thin magnetic film, and this sheath is arranged on the both sides of thin magnetic film inside with the liner of plastic optical fibre material system.This gasket material point is welded on the sheath, and its some or all phase of solder joint is done radial array for thin magnetic film, and so that a sine-shaped profiled outline to be provided, thin magnetic film traverses this outline line with during rotation keeping, to realize cleaning completely.At predetermined point the cleaning liner is installed, with regard to equipment and control device that sheath is produced, is needed a considerable amount of expenses.
Germany disclosed application DOS2,912,064 disclose another kind of Flexy Disk sheath, and this sheath has the polishing material of being made up of the packing felt on the inside surface of thin magnetic film both sides.Polishing material is attached on the sheath material by adhint or along straight line or along round wire.Except that by adhint to recording medium cause may damage, another shortcoming of being found is about sheath, each attachment point is lower than zone line, so that significant, harmful friction takes place and may cause to scrape film during the thin magnetic film rotation, and therefore also damages magnetic surface.
An object of the present invention is to provide a kind of protective sleeve with the packing felt that carries out cleaning, the packing felt that this packing felt is more known is installed simple and easy and more effective in operation.
According to the present invention, if the packing felt coating is fixed on the blank at close outer peripheral all positions of sheath and all positions that are adjacent to said all opening outline lines by the closely-spaced all needle-like solder joints that separate that short spacing is arranged to each other, and there, at the said position that has between all needle-like solder joints that little spacing separates, the packing felt coating is fixed on the blank by all needle-like solder joints that separate of the wide spacing with the big several times of more said short spacing quite widely, and we find that this purpose just can reach.
Aspect sheath according to the present invention, with the known packing felt thing with each single regional liner characteristic that big quilt accurately limits relatively, described packing felt coating might have the liner form on big surf zone.
During manufacture, if liner welding, that is, most of " liner " is formed so that packing felt has each position of the low pin weldering of having of its padding form density, or directly carries out after the welding at all edges of packing felt coating or all be with it suitable simultaneously.And all welding in each position can carry out randomly, that is, control by a random generator.
Wiping and cleaning to the improved procedure of packing felt coating and recording medium can obtain favourable result, and this processing even can regulate.The instantaneous read/write errors that in prior art, causes by dust, fine hair or dirt particulate; because novel protected cover and reduce widely or even avoid fully; particularly because in the time need not using fluey thereby need not use the packing felt that produces fine hair; might utilize downless packing felt, come to this usually.Because in fact the wiping district that no longer equally only minority is big in situation is effective; but there are numerous independent " liners " to replace; these liners can pick up each root fine hair and each dust and dirt particulate; these liners only are not limited to effectively to carry out the cleaning effect in all zonules near the wiping district of read/write opening; usually come to this, thereby obtain another important advantage.And packing felt contacts with the pressure on the surface of recording medium, is keeping when the latter is outside driver.The all particulates that embed in the packing felt are retained on their position.In traditional protective sleeve, moving apart driver does not just have the pressure contact later on.So flexible jacket surface springs back to their initial position, form a gap between the own and recording medium at them.Therefore, no longer include any assurance make before stably fixing particulate will remain and be embedded in the packing felt, especially, cause dirt to pick up the saturated of capacity because the wiping contact only concentrates in the zone.
In the embodiment of another protective sleeve, if the needle-like solder joint arrangement between blank and the packing felt coating separates with irregular distance, have erose each independent padding " liner " with formation, can obtain above-mentioned some advantage.
If the packing felt coating exposes at high temperature, make it cause contraction, under its contraction state, rely on the capillary of heat to be fixed on the blank then, this also is favourable.When the packing felt coating is exposed under the high temperature and be fixed, normally be in contraction state under this state.
If the packing felt coating comprises polypropylene or polyester felt, the long filament that is spun into continuously therein uses the method for the method, particularly spot welding of heat to be welded to one another, and this also is favourable.This manufacturing for the packing felt coating is favourable, and this packing felt coating is downless.
If packing felt coating material is added with the moisture absorption adjuvant, so that the absorption that moisturizes in an advantageous manner, this also is useful.
Packing felt coating material also can advantageously show antistatic behaviour, so that can reduce electrostatic charge again.
Very favourable, that face that blank does not cover packing felt also can have antistatic behaviour, so that also reduce electric charge there.
If for example effective liner height of packing felt coating is adjusted to about 200 to about 500 microns,, is good so that reach best wiping contact for 5.25 inches Flexy Disks.
In another kind of pattern, if antistatic property is to be provided by the coating of conducting electricity, also be useful, coating is to be added on the upper surface of packing felt coating as thin flexible membrane, and if desired, is added in the behind of blank.
Now consult accompanying drawing and narrate one embodiment of the present of invention as an example, its ground plan explanation packing felt coating before carrying out punching operation is folded on the blank.
The blank 11 that expression one is made by hard sheeting (for example Polyvinylchloride) among the figure, the numerous needle-like solder joints that are arranged in zone 1 and the zone 2 of packing felt 10 usefulness are fixed on this above blank.Sheath is by forming along dot-dash punch line 8 punching press main wheel profiles, going out opening 6 and opening 7, then with respect to the transverse line 9 folding blanks of punching press.Zone 1 is positioned at edge, the adjacent central fold line 9 of contiguous packing felt coating 10 and centers on the place that is used as all punch lines that form central opening 6 and read/write opening 7.Zone 2 is surrounded by zone 1.The zone 1 in, between each solder joint roughly the distance with common is the same apart from a, a is about 2 to 4 millimeters.In by regional 1 area surrounded 2, spot pitch b generally is about 15 to 25 millimeters greater than a.So the density of solder joint is being lower than in zone 1 in zone 2 substantially.
The packing felt material, for example the polypropylene felt comprises, for example, and the long filament that is spun into continuously, suitably be connected to each other (i.e. welding) was heated to about 100 ℃ rightly before lamination process; Length when this causes it according to room temperature shrinks about 0.5%.
Along the profile to be punched (with reference to dot-dash punch line 8) and following fold line 9, the packing felt 10 that has heated relies on spot pitch a(zone 1 is arranged) the hot welding of all capillaries be superimposed together.The additional fastening of 10 pairs of blanks 11 of packing felt realizes in closed region 2.In thereafter several hours, the packing felt 10 of moisture absorption absorbs moisture under room temperature and common air humidity, thereby becomes long and swell between all solder joints, makes to have position padding or that the liner sample raises in different zones.The height h at liner sample rising position can regulate, because it directly depends on the packing felt material of use and the distance between each solder joint (it can suitably be regulated).The punching press sheath can carry out in any stage, but blank material must be at room temperature.
As heat subsequently blank 11 together with the result of superimposed packing felt coating, blank material can not expand with hindering, because it is shorter than their length before the lamination process that the long filament of packing felt coating 10 does not become, so that the liner that raises becomes more smooth, yet does not produce any stress in blank material.So prevented blank part 11 bendings of heating effectively.Traditional before superimposed heating blank 11 separately because identical former thereby can cancel, so can save.
Because the moisture pick-up properties of traditional packing felt, this performance can be owing to use the adjuvant of moisture absorption, generally be to use the antistatic agent treatment of moisture absorption and strengthened, the elongation of described long filament (needs) makes that unexpectedly the gasket construction that reaches repeatably, determines becomes possibility.And Ohmage advantageously is decreased near the value of magnetosphere Ohmage and (is about 10 with regard to the chromium dioxide layer
6Ω) or lower, thereby in fact can prevent electrostatic charge accumulation and the error that causes by it.Also may in conjunction with the packing felt coating and, if desired also on blank (that is, on the outside of protective sleeve) use adjuvant together with moisture absorption and/or antistatic property.
In any case the packing felt material should be selected, the length that makes its long filament or tow shortens when the heating in mode repeatably and increases when absorbing moisture in mode repeatably, so that form the liner of determining length and height.
For 5.25 inches thin magnetic films (Flexy Disks), in not folding blank, gasket height is considered to favourable from about 800 to about 950 microns, and in folded state, the significant height of liner is from about 200 to about 500 microns, depends on the thickness of used packing felt.These sizes are for example used in practice, and polypropylene and polyester felt can reach well.With the protective sleeve that is provided with this pattern packing felt coating, still there was antistatic treatment to exist no matter whether do pre-clean processes, can both obtain zero error, zero repetition and zero excellent results that falls back.Test is to carry out with BASF 6108 Flexy Disk drivers of being made by BASF AG with an IBM personal computer.
Other felt material that can be used for purpose of the present invention comprise the polyester felt as all patterns of the packing felt of cleaning.
By the heat bonding polyester staple 743 with antistatic behaviour that Ludwigshafen BASF AG makes, especially can advantageously use in the present invention.
In order to increase the electric conductivity of packing felt coating, with the conduction finishing agent, for example, a kind of coating solution of conduction is processed at its lower or upper surface, is possible in principle at least.
Compare with commodity Flexy Disk, might reduce 2 to 3 times of instantaneous errors.
Claims (10)
1; a kind ofly be used for flat recording medium; the protective sleeve of flexible data recording medium particularly; comprise a blank that the plastics of opening are arranged on it; blank has at least two place's outward flanges to be bent and is bonded together; to form or the sheath of sealing or the sheath of opening along one side at the most; and be attached to packing felt coating on the blank with the hot weld method by the capillary that produces the needle-like solder joint; this protective sleeve is characterised in that: wherein the packing felt coating is being fixed on the blank near all positions of each outer peripheral all position of sheath and adjacent said all opening outline lines by all pin solder joints that the nearly interval that short spacing is arranged to each other separates; and; in the zone between all pin solder joints position that said nearly spacing is separated, the packing felt coating is that the isolated quite widely all pin solder joints by the wide spacing with the big several times of more said short spacing are fixed on the blank.
2, the protective sleeve of stipulating by claim 1; have all openings; for example; central authorities all openings and all openings of read/write there, the density of the said all pin solder joints in the density that it is characterized in that the said all pin solder joints in each position of the outline line of contiguous said all openings wherein and the said close outer peripheral all positions of sheath is similar.
3,, it is characterized in that all pin solder joints that wherein wide spacing is separated are with irregular spacing separately, so that between numerous pin solder joints, form all erose liners by the protective sleeve of claim 1 regulation.
4, by the protective sleeve of claim 2 or 3 regulations, it is characterized in that wherein the packing felt coating is to stand pyroprocessing when being fixed on the blank with said each pin solder joint, thus pre-shrunk.
5,, it is characterized in that packing felt coating wherein comprises the polypropylene or the polyester felt of the long filament that is spun into continuously with heat bonding each other by the protective sleeve of each regulation in the claim 1 to 4.
6, by the protective sleeve of each regulation in the claim 1 to 5, it is characterized in that wherein packing felt coating material is added with the moisture absorption adjuvant.
7, by the protective sleeve of each regulation in the claim 1 to 6, it is characterized in that wherein packing felt coating material is added with antistatic material.
8, by the protective sleeve of claim 7 regulation, it is characterized in that wherein antistatic material also puts on that (two) face that blank is carried the packing felt coating.
9, by claim 7 or 8 protective sleeves of stipulating; it is characterized in that wherein antistatic material is a conductive coating; this coating is applied to the outside of packing felt coating as thin flexible membrane, and if desired, also puts on that (two) face that blank is carried described packing felt coating.
10,, it is characterized in that the effective peak height of the packing felt coating in all positions between all pin solder joints that said nearly spacing is separated wherein is from about 200 microns to about 500 microns by the protective sleeve of each regulation in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86211114 CN86211114U (en) | 1985-10-15 | 1986-10-15 | Protective sleeve of flat recording medium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8529251.6 | 1985-10-15 | ||
| CN 86211114 CN86211114U (en) | 1985-10-15 | 1986-10-15 | Protective sleeve of flat recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86211114U true CN86211114U (en) | 1988-10-05 |
Family
ID=4812651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86211114 Expired - Lifetime CN86211114U (en) | 1985-10-15 | 1986-10-15 | Protective sleeve of flat recording medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86211114U (en) |
-
1986
- 1986-10-15 CN CN 86211114 patent/CN86211114U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |