Pure Presso Patents 30-Second Home Roasting with "Green Coffee Pearls"

Source: https://purepresso.com/

The quest for the perfect, freshest cup of coffee has driven innovations from bean-to-cup machines to single-origin subscriptions. Now, a new European patent (WO 2025/172375 A1) from Dutch startup Pure Presso B.V. aims to revolutionize the market by moving the roasting process from the factory directly into the consumer's kitchen, and it does so in a mere 30 seconds.

The Core Invention: Engineered "Green Coffee Pearls"

The heart of Pure Presso's invention is not just a machine, but a completely new form of coffee raw material: compressed, granulated green coffee beans, which the company brands as "Green Coffee Pearls."

Traditional "roast-at-home" systems use whole green beans, which can take several minutes to roast. Pure Presso's breakthrough lies in a specific manufacturing process:

1. Fragmentation: Green coffee beans are broken down into small fragments.

2. Compression: These fragments are then compressed into uniform, small granules or "pearls," typically 2-5mm in size, often spherical.

This engineered shape is the key to the system's speed and efficiency.

Why Pearls? The Technical Advantages

The patent outlines several critical benefits of using these compressed pearls over whole or coarsely ground beans:

• Ultra-Fast Roasting: The uniform, small size and increased surface area allow for incredibly rapid and even heat transfer. The patent specifies roasting can be completed in under 2 minutes, and the company's website promises a mere 30 seconds. This eliminates the long wait time that has plagued previous home-roasting concepts.

• Enhanced Gas Escape: The compression process creates a porous structure within the pearls, allowing gases and moisture to escape more easily during roasting. This can lead to a better-developed aroma and a more consistent roast.

• Optimal Machine Integration: The spherical shape and uniform size make the pearls ideal for automated handling within the machine, from the roasting chamber to the grinder and into the brewing unit, ensuring a seamless "bean-to-cup" experience.

The Pure Presso System: A Fully Integrated Experience

The patent describes a sophisticated countertop appliance that integrates three key units:

1. The Roasting Unit: Features a transparent, often glass, roasting chamber. Heated air circulates through the chamber, suspending and roasting the pearls. The transparency allows users to witness the roasting process in real-time.

2. The Grinding Unit: Immediately after roasting, the hot pearls are automatically transferred and ground.

3. The Brewing Unit: The freshly ground coffee is then brewed, resulting in a cup of coffee made from beans that were roasted just seconds before.

This all-in-one system ensures that the volatile aromatic compounds, which are often lost during the days or weeks between industrial roasting and brewing, are fully captured in the cup.

A Strong Sustainability Pitch

Pure Presso's website heavily emphasizes the environmental benefits of its model:

• Radical Energy Savings: By roasting a single portion in 30 seconds instead of a large batch in a factory for 16 minutes, the company claims a savings of over 90% in energy used for roasting.

• Reduced Carbon Footprint: This efficiency, combined with the elimination of transportation for roasted beans, saves up to 3 kg of CO2 per kg of coffee.

• Compostable Packaging: The Green Coffee Pearls are stable and do not release CO2, so they can be packaged in simple, compostable materials without the need for degassing valves used in roasted coffee packaging.

Pure Presso's patented technology represents a shift in coffee preparation. By re-engineering the coffee bean itself into a "pearl" optimized for speed and creating a machine to leverage it, they offer a compelling value proposition: the ultimate in freshness, unparalleled customization of roast profile, and a significantly reduced environmental footprint.

Trending Stories

Latest Stories