KR20030023863A - Online color exchange - Google Patents

Abstract

Disclosed are a system and method for selling coloring materials. An application program is provided on the server to convert spectrophotometer measurements at the customer's computer into color space coordinates. Spectrophotometer measurements are sent to the application program via a customer / client connection. The application program converts the spectrophotometer measurements to color space coordinates and stores the records cataloged by the color space coordinates in a server's database. Storing color space coordinates of the coloring material on the server facilitates the connection of potential buyers and sellers. In addition, by storing color space coordinates on the server, a larger number of records can also be obtained, thereby allowing greater compatibility in recipe calculation.

Description

Color exchange system and how to sell your products {ONLINE COLOR EXCHANGE}

The development of units of measure and global standards of weight has greatly facilitated international trade. Sellers can measure fabrics using scales or rulers that are globally accepted and can quantitatively describe fabrics such as weighing 100 kilograms or 300 meters in length. Thus, the buyer knows the exact amount of fabric without actually having to examine the fabric. This alleviates the need for the buyer to actually inspect the fabric, which significantly reduces the cost of the transaction and enables transactions between parties that are separated by vast distances.

However, the description of colors is more complicated. Simple color technologies such as red and blue provide a general color concept, but these concepts are too inaccurate in many commercial environments. If accurate color technology is required, the color is conveyed by physical samples examined by both parties. As such, delivering a physical sample from one party to another can further increase the time required to complete a transaction if the physical sample is sent by a late night courier.

It is common practice in the textile industry to use swatch booklets. The dyestuff supplier provides a variety of buyers with a pamphlet of sample fabrics dyed with each dye available to them. If a painter (dyehouse) wants to evaluate the colors that can be produced by using paints at a certain concentration on a particular substrate, the painter can observe a sample that shows the closest combination to what he / she wants. have. Providing sample pamphlets to buyers allows for faster recipe creation, thus improving customer service. Despite the advantages of sample pamphlets, there are also many disadvantages. Sample pamphlets are expensive to create and are not easy to duplicate, thus increasing the additional cost. In addition, paint suppliers should distribute sample pamphlets to each of their customers and potential customers. In many cases, customers are distributed worldwide, and this distribution can involve significant delays. Moreover, sample pamphlets should be updated or replaced as each dye is further generated. Due to the costs and delays associated with sample pamphlets, paint users (diehouses) often give up changing their dyes. Samples can also be used for the sale of colored products such as fabrics or yarns. If the buyer wants to purchase a fabric or thread of a particular color, the buyer merely identifies the particular color from the sample booklet and notifies the colored product manufacturer (fabric or yarn die house).

There are many ways to transmit color electronically, but electronic color transmission is currently inaccurate. For example, a color can be transferred from one to the other by optically scanning a sample of that color and electronically transmitting a digital representation of that color through a communication medium to a computer monitor or printer. The transmission of these digital representations is almost instantaneous and can be transmitted virtually anywhere in the world by using the Internet or a public switched telephone network. However, this digital representation must conform to a predetermined standard understood by both the optical scanner and the output device. If the optical scanner and the output device are separated by a large distance, there is a possibility that the optical scanner and the output device use different standards. In addition, the digital representation generated is based on the calibration parameters of the light scanner, as well as the substrate and illumination being colored. However, the color appearing on the output device is based on the calibration parameters of the output device.

CIE 1976 L * a * b * color space is the most widely used method for measuring object color. CIE 1976 L * a * b * is a mathematical model that describes color sensation and is based on the theory of color technology in opponent colors. The method of describing color by an opponent-type system is such that the information from the cone cone receptors of the eye somewhere between the eye and the brain is a bright-black, red-green, and yellow-blue signal. Follows the concept of being converted to: The concept is that color can be thought of as a combination of red and yellow, red and blue, green and yellow, and green and blue. One advantage of the CIE 1976L * a * b * standard is that the differences between colors are consistently well consistent with the visually perceived differences.

The digital representation of the color generated by the light scanner depends on various factors such as the substrate being colored and the illumination. In addition, the optical scanner can digitally represent the recognized color. In contrast, a spectrophotometer is a device for measuring reflectivity for each wavelength by exposing a colored substrate to a series of lights having different predetermined wavelengths. The spectrophotometer also measures "true" colors as opposed to perceived colors.

Although spectrophotometers measure true color characteristics, the results of spectrophotometers vary significantly with calibration parameters.

The present invention relates to a system and method for an on-line color physics web site that defines a standardized color space that defines all colors in the visual spectrum. The spectrophotometer of the customer's computer, controlled by the server computer's software program, produces a digital representation of the input coloring substance, which appears at a known concentration on a known substrate or colored product. The data structure of the server computer stores this digital representation and is globally accessible.

The present invention relates to color physics and, more particularly, to a system for accurately communicating color needs and supplies through electronic media.

1 is a block diagram of a color exchange system,

2 is a block diagram of a high speed communication network configured to facilitate color exchange;

3 is a block diagram of a color space;

4 is a block diagram of a system for inputting the color of a sample;

5 is a block diagram of an exemplary histogram,

6 is a block diagram of a color exchange system configured to facilitate the sale and purchase of coloring materials and colored products;

7 is a flowchart illustrating the operation of the color exchange system.

Referring now to FIG. 1, shown is a block diagram of a color exchange system 100. The color exchange system 100 connects the members of the colored product supply chain. Members of the colored product supply chain are producers 101 of dyes, paints and other substances used for coloring (hereinafter referred to as coloring substances), using these coloring materials to color various products (hereinafter colored) A product manufacturer 102, referred to as colored products, a colored product assembler 103 that assembles the colored product into a finished product, and any number of intermediates 104 leading to a retailer. Coloring material producer 101 includes, for example, dyestuff warehouses and paint manufacturers. Colored product manufacturers 102 include, for example, fabric dyeers, diehouses, auto parts makers, and molded plastic manufacturers. Colored product assemblers 103 include, for example, garment manufacturers and automobile manufacturers. Sellers who may include any of the above described portions may transmit their inventory of colored materials or colored products available for sale. In addition, a buyer, which may include any of the above-described parts, may transmit a coloring material or coloring product for searching for a purchase. Information about color for search and sale is classified and cataloged within predetermined color measurements and technical standards known as color spaces. Thus, a buyer who wants to buy a particular coloring material or colored product and a seller who wants to sell can find buyers and sellers who simultaneously send colors and secure transactions.

By centralizing the colors for search and sale, the color exchange system 100 reduces significant transaction costs. For example, a seller can save money associated with disseminating information about a product to sell. The buyer does not have to contact each seller to examine the inventory. By reducing transaction costs, the color exchange system 100 increases the liquidity of the market for coloring materials. In order to further increase the liquidity of the market for coloring materials and colored products, high speed communication must be made between the seller and buyer and the color exchange system 100.

2, a block diagram of a high speed communication network for facilitating the functionality of the color exchange system 100 described in FIG. 1, indicated generally by the reference numeral 200, is shown. Computer network 200 includes at least one server 205 and any number of customer computers 210. Server 205 is a computer that centralizes various resources for use by any number of customer computers 210. Resources centralized by the server 205 may include, for example, an application program 215 and a database 220. The server 205 may also provide an email service for the customer computer 210. The application program 215 includes a series of executable instructions stored in the memory of the server 205 and is preferably a multi-user program that can be used simultaneously by multiple customer computers 210.

Customer computer 210 accesses centralized resources by establishing an input / output connection with server 205, known as a customer / server connection. Customer / server connection is established by communication channel 225. Communication channel 225 includes, but is not limited to, any combination of communication media, such as, but not limited to, coaxial cables, fiber optic links, wireless radio links, or public switched telephone networks. Another type of communication medium is known the Internet. The Internet includes any number of local area networks (LANs) and wide area networks (WANs) from corporations, educational institutions, the military, and government agencies around the world, connected together by large data links.

In many cases, both customer computer 210 and server 205 are directly connected to the Internet. Customer computer 210 and server 205 communicate by addressing and transmitting data packets in accordance with Internet protocols, thereby establishing a customer / server connection. Alternatively, customer computer 210 establishes a connection with an internet port, known as an internet service provider (ISP), using a connection medium (usually a connection within a public switched telephone network) and then connects to the Internet. Can be used to establish a connection from the ISP to the customer computer 210.

The color exchange system 100 may be associated with the server 205, and each member 101, 102, 103, 104 of the colored product supply chain accesses the color exchange system 100 via the customer computer 210. can do. Execution in this manner enables simultaneous communication between the buyer and seller and the color exchange system 100. In addition, the centralized resources of the server 205 allow for storing information about the seller's inventory and the buyer's needs in a remotely accessible database 220. The server 205 is preferably connected directly to the Internet, and at least a major component of the communication channel includes the Internet, thereby allowing access from a customer computer 210 located virtually anywhere in the world.

The high speed communication network 200 allows for quick and efficient communication between the buyer and the seller. Despite high-speed communications, one of the major problems encountered in some cross-border trade between buyers and sellers is that the buyer cannot inspect the product purchased before closing the transaction. It is only after receiving the product that the buyer can actually be assured of his acceptability. Partly alleviating this problem is developing a global standard for the weight and unit of measurement. Sellers can measure fabrics using scales or rulers that are accepted around the world, and can quantitatively describe fabrics such as weighing 100 kilograms or 3000 meters in length. Thus, the buyer knows the exact amount of fabric without actually having to examine the fabric.

However, it is much more complicated to describe the coloring material or colored product owned by the seller so that the buyer can properly evaluate it. Simple color technologies such as red, blue, etc. are not accurate enough for many industrial applications. For example, a color product assembler 103, such as the garment manufacturer 103, may wish to purchase a set of zippers and sewing threads from the colored product manufacturer 102 to apply certain materials to make the garment. have. The garment manufacturer 103 must purchase a zipper and sewing thread that matches the color of the material within some degree of tolerance. In order for the garment manufacturer 103 to recognize and purchase such a zipper and sewing thread, the garment manufacturer 103 must convey the desired color and be able to know the color of the zipper and sewing thread produced by the colored product manufacturer 102. do.

Referring next to FIG. 3, a block diagram of a color space for describing color is shown, generally indicated by reference numeral 300. The most widely used color space 300 is known as the CIE 1976 L * a * b * color space. CIE 1976 L * a * b * is a mathematical model that describes color sensation and is based on the theory of color technology of alternative colors. This concept is that color can be thought of as a combination of red and green, yellow and blue, and black and white. One advantage of CIE 1976 L * a * b * is that the differences between colors are consistently well consistent with the visually perceived differences. A given color is associated with a series of parameter measurements that measure the red / green factor, blue / yellow factor, and black / white factor. These measurements uniquely describe color and can be represented as a point in the three-dimensional color space 300, where the red / green parameter measurements are shown as points on the red / green axis 305a, and blue The / yellow parameter measurement is shown as a point on the blue / yellow axis 305b and the black / white parameter measurement is shown as a point on the black / white axis 305c.

Information about the seller's inventory or the buyer's request may be transmitted using the above color space 300. The information may also be cataloged and stored as records in a data structure that mimics the color space 300 in the database 220. The data structure sorts these records and makes them searchable by the visual appearance of color.

Referring now to FIG. 4, shown is a block diagram of a system for inputting the color of a sample 402 into an on-line database, such as database 220, that includes a data structure that mimics the color space, see generally. It is indicated by reference numeral 400. The sample 402 can have the color of the colored material or colored product in the seller inventory, or can have the color of the colored material or colored product the buyer is looking for. The system includes a spectrophotometer 405 attached to a customer computer 210.

It is noted that color may appear differently based on the ambient light and substrate. In addition, different colors may appear equally based on ambient light and substrate. This effect is known as metamerism. Spectrophotometer 405 performs a wavelength reflection test on sample 402. The wavelength reflection test on the sample 402 produces a result that displays color regardless of ambient lighting. In addition, when the spectrophotometer performs wavelength reflection tests on colored and uncolored samples of a substrate separately, the influence of the substrate can be mathematically separated to provide results for the effect of the coloring material itself.

5, a block diagram of a histogram, indicated generally by the reference numeral 500, is shown. Histogram 500 includes a horizontal axis 505 that measures wavelength 510 of light. Spectrophotometer 405 illuminates the sample 402 with a predetermined intensity of light for each wavelength 510 (typically 32 different wavelengths that spread evenly around the visual spectrum). The intensity of the light reflected from the sample 402 is measured by the spectrophotometer 405, where the intensity of the light reflected from the sample 402 is plotted against the vertical axis 518 as a percentage of the light intensity reflected on the sample 402. Is represented by). Exemplary measurements of the light intensity reflected from the sample 402 as a percentage of the light intensity reflected on the sample 402 are shown in a diagram 515. The coordinates of the diagram 515 are gathered to form a histogram record.

Referring again to FIG. 4, a histogram record for sample 402 is provided to application program 215. The application program 215 performs a mathematical transformation that converts histogram records into records based on the three-dimensional color space of the CIE 1976 L * a * b * standard. Note that while the CIE 1976 L * a * b * standard is the most widespread, other color standards may also be used. The histogram record is output to the database 220 for storage. CIE 1976 L * a * b * standard parameter measurements under one standard light source are used as a sorting index for histogram records in database 220 to facilitate retrieval. In addition, the application program 215 may calculate the CIE 1976 L * a * b * standard parameter measurements of the resulting color from the known concentration of color material for the sample 402 applied to any known substrate.

Note that computers, such as server 205 and customer computer 210, execute lower machine specific instructions known as machine code. Global access to the Internet creates a problem of incompatibility between the application program 215 of the server 205 and the customer computer 210. To alleviate this problem, a program known as browser 420 is used at customer computer 210. The browser 420 is a program that executes an application program written in a high-level programming language, such as the application program 215. Thus, the application program 215 only needs to be written in a high-level programming language such as Java, which is generally enabled by the browser 420.

Browser 420 also supports histogram transfer from customer computer 210 to server 205. The customer / server connection is established by providing the browser with an address for the server 205 according to a predetermined addressing technique and communication protocol. The browser 420 transmits the histogram record by encapsulating the histogram record as an object and sending the object to the application program 215.

It is also desirable to provide a user interface program 425 between the user and the spectrophotometer 405. The user interface program 425 prompts the user to apply the sample 402 to the spectrophotometer 405. After applying the sample 402, the user may indicate via the user interface 425 that the sample 402 is ready for evaluation. In response to this user indication, the user interface program 425 causes the spectrophotometer 405 to evaluate the sample 402. The user interface program 425 can be configured as a plug-in program. The plug-in program is a program that is called by the browser 420 in dialogue with the browser 420.

Storing records in database 220 is advantageous for several reasons. One advantage is that sellers and buyers who want to buy or sell a particular coloring material or colored product can easily find each other by observing histogram records in the database 220. The seller wishing to sell the coloring material or the colored product simply scans the sample 402 with color using the spectrophotometer 405 as described, and includes histogram records stored in the database 220 as well as contact information, You can get your own supply for investigation by potential buyers. If the seller wishes to sell the coloring material, the application program 215 may generate a histogram record describing any number of colors formed by applying the known concentration of the coloring material to the known substrate. In the same way, a purchaser who wants to purchase a coloring material or colored product simply scans a sample of color 402 using a spectrophotometer 405, and a histogram record stored in the database 220 with contact information, The amount required for investigation by potential sellers can be obtained. Once the buyer or seller scans the sample 402, the application program 215 may choose to purchase such a similar coloring material or colored product, or to purchase a similar coloring material or colored product within a reasonable threshold. Facilitate the retrieval of histogram records in the database 220 about vendors that can be supplied. The application program 215 searches the database 220 by using the color space parameter of the color as the database query parameter.

Another important advantage is that recipes for coloring materials using histogram records in the database 220 can be calculated to produce the specific coloring materials the buyer seeks within certain thresholds. The greater the number of reactants, the greater the number of recipes that can approximate the coloring material of a particular demand. For example, a colored product manufacturer, such as fabric dyeer 102, may only scan a fabric sample 402 with the coloring material required by spectrophotometer 405 and send a histogram record to application program 215. . The application program 215 can examine the histogram records in the database 220 to produce a recipe that produces a coloring material that matches the coloring material on the sample 402 within a predetermined threshold. Fabric dyeer 102 may vary in some ways, such as, for example, the number of coloring materials, the amount of specific coloring materials, the price, the inclusion of certain coloring materials, and the limitations on exclusion of specific coloring materials. Parameters can be set. The application program 215 can then act as a search engine that draws out recipes for the fabric dyeer 102. In the case of the seller, the paint wholesaler 101 searching for the fabric dyeer 102 by searching for a particular color match causes the application program 215 to request for the coloring material required from the coloring material of the inventory of the paint wholesaler 101. Recipe can be calculated. The paint wholesaler 101 may then produce the product coloring material and sell the coloring material to the fabric dyeer 102.

Centralized resources of server 205 and application program 215 provide another benefit to recipe calculation. The application program 215 may be configured such that recipe prediction for a particular set of coloring material and substrate is also based on actual results obtained from an initial recipe comprising some coloring material of the coloring material or substrate set. Can be. The actual result of the initial recipe can be obtained by having a user scan a sample 402 of the resulting coloring material or colored product with the spectrophotometer 405. Histogram records representing the resulting coloring material or colored product may also be stored in the database 220.

In a centralized server 205 environment where multiple users are using the same prediction functionality resources, such as application program 215 and database 220, the actual resulting coloring material or colored product data. Or correction coefficients derived from the data from the first user who has already used a particular set of coloring material and substrate, to a second user who is beginning to use some or all of the coloring material or substrate set. Can be delivered. In this case, the application program 215 may calculate a more accurate recipe for the second user using the above data.

Referring to FIG. 6, a block diagram of a color exchange system 100 configured to facilitate the sale and purchase of coloring materials and colored products is shown. Members 101, 102, 103, 104 of the colored product supply chain register with the color exchange system 100 and provide a member information file to the color exchange system 100, which is stored in the merchant database 605. do. The member information file contains various identification and financial information about the member. Color exchange system 100 also includes a messaging system 610, an application program 215, and a transaction database 613.

If the buyer finds a potential seller, or vice versa, the buyer / seller uses the contact information provided in the database 220 storing the color space to electronically utilize a messaging system 610 such as email to each other. You can communicate with each other by sending messages. The server 205 can facilitate the transmission of electronic messaging by operating as an email server. If the buyer and seller agree to the sale of a particular coloring material, the buyer and seller can record the details of the transaction in transaction database 613. After consent, the buyer can pay for the purchase using an electronic payment system such as a credit card or debit card. The credit / debit card account or information may be retrieved from the merchant database 605 by the application program 215 or, alternatively, provided by the buyer at the time of the transaction.

The color exchange system 100 verifies the buyer's credit or funds available by requesting a credit for the selling price via a data link to a clearinghouse 620 associated with the buyer's financial institution. If the institution 620 declines to issue a letter of credit, the transaction is stopped by the color exchange system 100, thereby notifying the buyer and seller. Alternatively, the buyer can be configured to telegraph the funds from one bank account to the bank account 625 associated with the color exchange system 100. Color exchange system 100 is also connected to a bank account 625 associated therewith via a data link.

Issuing a letter of credit by the buyer's financial institution 620 or receiving the buyer's funds in the bank account 625 associated with the color exchange system 100 is electronically confirmed via the data link. When the buyer's funds are received, the color exchange system 100 notifies the seller and requires the seller to begin delivery of the product. If the seller provides proof that the product has been delivered in accordance with the transaction agreement, the color exchange system 100 transfers the funds as payment to the seller. Required evidence from the seller may include, for example, a bill of lading. Alternatively, buyers and sellers may agree to change arrangements such as freight on board, etc., which are recorded in transaction database 615. In this case, the seller must provide proof of delivery as promised in the sales contract in transaction database 615.

Proof of delivery is provided by a direct data link with courier 630 or shippers 635. When the seller delivers to courier 630 or shipper 635, the courier / shipper electronically sends the appropriate proof of delivery. In response, the color exchange system transfers funds as payment to the seller.

In addition, color exchange system 100 may facilitate purchase of insurance to ensure delivery of coloring material. The color exchange system 100 can provide links to various insurers 640 from which the parties can purchase insurance. As a revenue source, the color exchange system 100 may receive a fee for each transaction being insured or bill each insurer 640 with a flat advertising fee.

Referring next to FIG. 7, a flow diagram illustrating the operation of color exchange system 100 during an exemplary coloring material transaction is shown. In step 705, the color exchange system 100 receives information indicating the colored material or colored product in the inventory of any number of sellers. In step 710, the color exchange system 100 receives information about the colored material or colored product the buyer is about to purchase. In step 715, color exchange system 100 pairs the buyer and any number of sellers, who may provide a colored product or coloring material that produces the coloring material required by the buyer. The above can be performed in a number of ways. For example, a buyer searching the database 220 may find the seller (s) or vice versa. Alternatively, when the buyer searches for the coloring material, the buyer can use the application program 215 to create a recipe, which recipe includes the seller (s) coloring material. In another example where the buyer searches for the coloring material, the seller may use the application program 215 to create a recipe and notify the buyer of this. In step 720, the buyer and seller attempt to negotiate a transaction. If the negotiation is not successful, no transaction result and no further action is taken by the color exchange system 100.

If the negotiation succeeds in step 720, a record of the transaction is received by the color exchange system 100 and stored in the transaction database 615 (step 725). In step 725, the color exchange system 100 allows the buyer a predetermined amount of time to fund the color exchange system 100. If the buyer fails to provide funds within this predetermined amount of time, the color exchange system 100 stops the transaction and notifies both parties (step 730), and no further action is taken.

If the color exchange system 100 receives the buyer's funds in step 725, the color exchange system 100 notifies the seller to begin delivery (step 735). The seller is allowed a predetermined amount of time to provide proof of delivery in accordance with the transaction agreement (step 740). If the seller does not provide such proof within a predetermined amount of time, the color exchange system 100 stops the transaction (step 745) and returns the funds to the buyer (step 750). If the seller provides this proof in accordance with the transaction agreement within a predetermined amount of time, the color exchange system 100 transfers the buyer's funds to the seller as a payment (step 755), whereby the transaction is completed.

Claims (16)

In the color exchange system for product sales, A second customer receiving color information about the at least one product via a first customer / server connection connecting the server to a first customer computer associated with the at least one seller and connecting the server to a second customer computer associated with the seller A server that receives color information about a sought good over a server connection, A computer readable medium for storing a plurality of executable instructions on the server, the means for converting the color information about the at least one product into at least one point in a color space. readable medium) Color exchange system comprising a. The method of claim 1, And at said server, a database for storing color information indexed to said at least one point in said color space. The method of claim 1, And the plurality of executable instructions are executable by a browser program on the first client computer and the second client computer. The method of claim 3, wherein And the plurality of instructions are executable simultaneously on the first customer computer and the second customer computer. The method of claim 1, And the plurality of executable instructions further comprise means for calculating a target point in a color space corresponding to the color information of the desired product. The method of claim 5, The plurality of executable instructions further comprise means for finding the at least one seller from a plurality of sellers, wherein color information for the at least one product received from the customer associated with the seller is predetermined for the target point. A color exchange system that translates to at least one point in the color space within a predetermined threshold. The method of claim 5, The product comprises coloring substances, the computer readable medium further comprising means for finding the at least one seller from a plurality of vendors, the received computer received from the customer associated with the at least one seller. Color information for at least one product is converted into a plurality of points in a color space corresponding to a plurality of coloring materials producing a desired coloring material. In the method of selling a product, Receiving color information about at least one product from at least one seller; Receiving color information about the required product from the buyer; Mating the buyer and the at least one seller Including, The coloring information of the at least one product from the at least one seller is similar to the color information of the required product. How to sell your product. The method of claim 8, Receiving information about at least one coloring material from the at least one vendor comprises receiving a plurality of wavelength reflection measurements corresponding to the coloring material associated with the corresponding plurality of wavelengths Way. The method of claim 9, Receiving information about at least one coloring material from the at least one vendor comprises converting the plurality of wavelength reflection measurements associated with the plurality of wavelengths to at least one point in a color space. The method of claim 10, Receiving information about the requested coloring material from the buyer further comprises calculating a target point in the color space describing the color information about the required product. The method of claim 11, Pairing the buyer with the at least one seller includes finding the at least one seller from a plurality of sellers, wherein coloring information about the at least one product from the at least one seller is the target point. A method of selling a product that is converted to at least one point within a predetermined threshold of. The method of claim 11, Wherein the product comprises a coloring material, and wherein mating the buyer and the at least one seller comprises finding the at least one seller from a plurality of sellers, wherein the at least one from the at least one seller Coloring information about the product is converted into a plurality of points in the color space, the plurality of points corresponding to a plurality of coloring materials producing the required coloring material. The method of claim 8, Receiving from the buyer or the at least one seller a transaction agreement comprising a transaction price and a required proof of delivery. The method of claim 14, Receiving funds equal to a transaction price from the buyer. The method of claim 15, Receiving a proof of delivery from the seller; In response to receiving proof of delivery from the seller, transmitting the buyer's funds to the seller Product sales method comprising more.